View / the Complete Manual

View / the Complete Manual
Ethernet
Communications
Modules
Manual Number HX--ECOM--M
WARNING
Thank you for purchasing automation equipment from Automationdirect.com™, doing business as,
AutomationDirect. We want your new automation equipment to operate safely. Anyone who installs or uses this
equipment should read this publication (and any other relevant publications) before installing or operating the
equipment.
To minimize the risk of potential safety problems, you should follow all applicable local and national codes that regulate
the installation and operation of your equipment. These codes vary from area to area and usually change with time. It is
your responsibility to determine which codes should be followed, and to verify that the equipment, installation, and
operation are in compliance with the latest revision of these codes.
At a minimum, you should follow all applicable sections of the National Fire Code, National Electrical Code, and the
codes of the National Electrical Manufacturer’s Association (NEMA). There may be local regulatory or government
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For additional warranty and safety information, see the Terms and Conditions section of our Desk Reference. If you
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AVERTISSEMENT
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Afin de réduire au minimum le risque d’éventuels problèmes de sécurité, vous devez respecter tous les codes locaux
et nationaux applicables régissant l’installation et le fonctionnement de votre équipement. Ces codes diffèrent d’une
région à l’autre et, habituellement, évoluent au fil du temps. Il vous incombe de déterminer les codes à respecter et de
vous assurer que l’équipement, l’installation et le fonctionnement sont conformes aux exigences de la version la plus
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conviennent à votre application particulière et nous n’assumons aucune responsabilité à l’égard de la conception, de
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Nos produits ne sont pas insensibles aux défaillances et ne sont ni conçus ni fabriqués pour l’utilisation ou la revente
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Copyright 2011, Automationdirect.commc Incorporated
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1
Manual Revisions
If you contact us in reference to this manual, be sure and include the revision number.
Title: Ethernet Communication Modules
Manual Number: HX--ECOM--M
Issue
Date
Description of Changes
Original
4/98
Original Issue
1st Edition,
Rev A
8/02
Added DL250--1 and DL260 references
Removed DL250 references
Minor changes
(Note: DL250 has the same functionality as the
DL250--1 except for local expansion capability.)
2nd Edition
6/03
Added H0--ECOM module, changed manual part
number
2nd Edition,
Rev A
6/03
Corrected Special Purpose Communication Relays
3rd Edition
11/04
Added H2--ECOM100 module
Updates for NetEdit3
3rd Edition,
Rev A
04/05
Added H0--ECOM100 module
3rd Edition,
Rev B
04/06
Added H4--ECOM100 module
3rd Edition,
Rev C
06/11
Updated manual and made change to Module ID
DIP switch and corrected tables in Ch. 5.
1
Table of Contents
i
Chapter 1: Introduction
Manual Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
The Purpose of this Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Other Reference Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Who Should Read this Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Quality Technical Manuals and Technical Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Conventions Used . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ECOM Module Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ECOM Communication Possibilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Your Network PC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Frequently Asked Questions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1--2
1--2
1--2
1--2
1--2
1--3
1--4
1--4
1--5
1--6
Chapter 2: Setup and Installation
ECOM Network Identifiers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Module ID . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Name . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
IP Address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ethernet (MAC) Address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Using Multiple Network Identifiers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Setting the Module ID with the DIP Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
H0 / H2 Series ECOM DIP Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
The H4 Series ECOM DIP Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inserting the ECOM Module in the PLC Base . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
H0 Series ECOM Module Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DL205 Slot Choices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
H2 Series ECOM Module Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DL405 Slot Choices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
H4 Series ECOM Module Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ECOM Network Layouts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Network Cabling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ECOM Supports Two Standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
10/100BaseT Networks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
10/100BaseT Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
UTP Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
10BaseFL Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fiber Optic Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fiber Optic Module ST Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maximum Cable Length . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maximum Number of ECOM Modules on the Network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2--2
2--3
2--3
2--4
2--4
2--4
2--5
2--5
2--6
2--7
2--7
2--7
2--8
2--9
2--10
2--10
2--12
2--12
2--12
2--13
2--13
2--13
2--13
2--13
2--14
2--15
ii
Table of Contents
Chapter 3: Configuring ECOMs Using NetEdit3
NetEdit3 Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installing NetEdit3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Launching NetEdit3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
The NetEdit3 Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Adding Network Protocol Support to the NetEdit3 PC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Using NetEdit3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ethernet Communication Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ethernet Address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Module Type, IP Address and ID . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Module Info> General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Module Info>Ethernet Stats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ECOM Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ECOM Settings>Configuration>General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ECOM Settings>Configuration>Advanced . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ECOM Settings>Configuration>Peer to Peer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ECOM Settings>Utils>Test CPU Access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ECOM Settings>Firmware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FileMenu>Live Update . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
F / B / C Columns . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3--2
3--2
3--3
3--3
3--4
3--5
3--5
3--6
3--6
3--7
3--7
3--7
3--8
3--9
3--10
3--12
3--12
3--13
3--13
Chapter 4: RLL Programming for Communications
PLC-to-PLC Communications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
How RLL is Used for Communications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Network Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Read (RX) and Write (WX) Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Building the Read (RX) or Write (WX) Routine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
The First LD Instruction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
The Second LD Instruction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
The LDA Instruction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Write (WX) Instruction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Addressing the Different Memory Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Bit Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Word Memory and Aliases . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DL05 CPU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DL06 CPU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
D2--240 CPU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
D2--250--1 CPU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
D2--260 CPU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
D4--430 CPU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
D4--440 CPU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
D4--450 CPU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Special Relays for Communications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Program with One Read Instruction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Program for the Initiating PLC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Program for the Responding PLC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rung 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rung 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rung 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ethernet Communications Modules, 3rd Edition Rev. C, 04/11
4--2
4--2
4--3
4--3
4--3
4--3
4--4
4--4
4--5
4--6
4--6
4--6
4--7
4--7
4--8
4--8
4--9
4--9
4--10
4--10
4--11
4--13
4--13
4--13
4--14
4--14
4--14
iii
Table of Contents
Rung 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Program for the Responding PLC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Example Program with One Write Instruction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Program for the Initiating PLC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Program for the Responding PLC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rung 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rung 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rung 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rung 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Program for the Responding PLC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Integrating Multiple Read and Write Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Interlocking Relays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
First RX/WX Instruction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Second RX/WX Instruction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Third RX/WX Instruction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Returning to the First RX/WX Instruction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Shift Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Store If Equal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
First RX/WX Instruction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Second RX/WX Instruction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Third RX/WX Instruction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4--14
4--14
4--15
4--15
4--15
4--16
4--16
4--16
4--16
4--16
4--17
4--17
4--18
4--19
4--19
4--19
4--20
4--20
4--21
4--21
4--21
Chapter 5: MODBUS TCP for H0/H2/H4--ECOM100
MODBUS TCP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Client / Server Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Protocol Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Supported MODBUS Function Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Network Server (slave) Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
MODBUS Function Codes Supported . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Determining the MODBUS Address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
If Your Host Software or Client Requires the Data Type and Address . . . . . . . . . . . . . . . . . . . . .
Example 1: V2100 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Example 2: Y20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Example 3: T10 Current Value . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Example 4: C54 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
If the Host Software or Client Requires an Address ONLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Example 1: V2100 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Example 2: Y20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Example 3: C54 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Network Client (master) Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
MODBUS Function Codes Supported . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PLC Memory Supported for Client Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Example 1: Calculating Word PLC Address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Example 2: Calculating Discrete Input PLC Address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Building the Read (RX) or Write (WX) Routine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Step 1: Identify ECOM Slot Location and Server Node # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Step 2: Load Number of Bytes to Transfer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Step 3: Specify Master Memory Area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Step 4: Specify Slave Memory Area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Communications from a Ladder Program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5--2
5--2
5--2
5--4
5--5
5--5
5--5
5--6
5--11
5--11
5--11
5--11
5--12
5--14
5--14
5--14
5--15
5--15
5--16
5--17
5--17
5--18
5--18
5--19
5--19
5--19
5--20
Ethernet Communications Modules, 3rd Edition Rev. C, 04/11
iv
Table of Contents
Multiple Read and Write Interlocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
H0/H2--ECOM100 System Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5--20
5--21
Chapter 6: H0/H2/H4--ECOM100 DHCP & HTML Configuration
H0/H2/H4--ECOM100 DHCP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DHCP Issues . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Disabling DHCP and Assigning a Static IP Address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Using HTML Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Connecting to the H0/H2/H4--ECOM100 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
H0/H2/H4--ECOM100 Client Peer to Peer Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6--2
6--2
6--2
6--3
6--3
6--5
Chapter 7: Maintenance and Troubleshooting
Isolating a Communication Problem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Diagnostic Tools and Techniques . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Troubleshooting Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ECOM Module Diagnostic LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
H0 Series Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
H24--ECOM--(F) Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
H2/H4--ECOM100 Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Using NetEdit3 for Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Select a Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Module Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Change Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ethernet Stats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
RX/WX Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Record the . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Module Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replacing the ECOM Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Diagnosing Network Cable Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7--2
7--2
7--2
7--4
7--4
7--5
7--6
7--7
7--7
7--7
7--8
7--8
7--9
7--9
7--9
7--10
7--11
Appendix A: General Specifications
General Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ethernet Standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ethernet Communications Modules, 3rd Edition Rev. C, 04/11
A--2
A--4
Introduction
In This Chapter. . . .
— Manual Overview
— ECOM Module Introduction
— Frequently Asked Questions
11
1--2
Introduction
Introduction
Manual Overview
The Purpose of
this Manual
This manual describes how to use the
Ethernet Communication (ECOM)
Modules. You will find information about:
S
S
S
S
S
S
Setting up the ECOM module
Network layouts
PC-to-PLC communications
PLC-to-PLC communications
RLL programming examples
Maintenance and troubleshooting
Other Reference
Materials
Other DirectLOGICt manuals may be useful for your application.
User Manuals
S DL05 User Manual
part number D0--USER--M
S DL06 User Manual
part number D0--06USER--M
S DL205 User Manual
part number D2--USER--M
S DL405 User Manual
part number D4--USER--M
S DirectSOFT User Manual
(with part number PC--PGMSW v2.3
or later)
S KEPDirect for PLCs
(with part number DA--KEPPLC--M)
Who Should Read
this Manual
If you need a high-speed communications link between your DirectLOGIC PLC and
PCs or other DirectLOGIC PLCs and you understand the basics of installing and
programming PLCs, this is the right manual for you. This manual gives you the
information you need to set up and install a communication link to an ECOM module.
Quality Technical
Manuals and
Technical Support
We strive to make our manuals the best in the industry. We rely on your feedback to
let us know if we are reaching our goal. If you cannot find the solution to your
particular application, or, if for any reason you need additional assistance, please
call us at 770--844--4200. Our technical support group is glad to work with you in
answering your questions. They are available weekdays from 9:00 a.m. to 6:00
p.m. Eastern Time. You can also contact us on the web at:
http://www.automationdirect.com
If you have a comment or question about any of our products, services, or manuals
please fill out and return the ‘Suggestions’ card that came with this manual.
Ethernet Communications Modules, 3rd Edition Rev. C, 06/11
Introduction
1--3
Conventions Used
When you see the “notepad” icon in the left--hand margin, the paragraph to its
immediate right will be a special note.
The word NOTE: in boldface will mark the beginning of the text.
When you see the “exclamation mark” icon in the left--hand margin, the paragraph to
its immediate right will be a warning. This information could prevent injury, loss of
property, or even death (in extreme cases).
The word WARNING: in boldface will mark the beginning of boldface text.
Key Topics for
Each Chapter
The beginning of each chapter will list the
key topics that can be found in that
chapter.
1
Ethernet Communications Modules, 3rd Edition Rev. C, 06/11
Introduction
When you see the “light bulb” icon in the left--hand margin, the paragraph to its
immediate right will give you a special tip.
The word TIP: in boldface will mark the beginning of the text.
1--4
Introduction
ECOM Module Introduction
Introduction
Several Ethernet Communication (ECOM) modules are currently available for use
with DL05/06, DL205 and DL405 PLC systems. The ECOM modules are shown
below. These modules provide a low-cost, high-speed Ethernet link for PLC
systems. The modules are easy to set up and install on 10/100BaseT (twisted pair,
copper wire) or 10BaseFL (fiber optic) Ethernet networks.
LEDs on the face of each module give vital information about the status of the
module and the communication link. The 10/100BaseT modules use standard RJ45
modular connectors, and the 10BaseFL modules use ST style bayonet connectors.
DL05/06 ECOM Modules
H0--ECOM
H0--ECOM100
DL205 ECOM Modules
H2--ECOM
H2--ECOM100
H2--ECOM--F
DL405 ECOM Modules
H4--ECOM
H4--ECOM100
H4--ECOM--F
H0/H2/H4--ECOM100 modules shown
NOTE: If you are using a D0--06LCD in your DL06 PLC, the date code for the display
unit must be 032A_ or later to be compatible with the H0 series ECOM modules.
ECOM
Communication
Possibilities
You can use the ECOM modules to share data between two or more DirectLOGIC
PLCs or between DirectLOGIC PLCs and personal computers. The
H0/H2/H4--ECOM100 additionally allows client/server communications with other
Ethernet devices using the MODBUS TCP protocol. Communication between
PLCs/MODBUS TCP devices is accomplished by using the Read/Write (RX/WX)
instructions which are available in the DirectSOFT Programming Software Users
Manual. Chapters 4 and 5 explain the use of the RX/WX instructions.
You can also use a personal computer running DirectSOFT Programming Software
to program your PLCs over the Ethernet network. It is just like programming through the
programming port on the CPU, but with the convenience of doing it from a single
location.
Use catalog number PC--DSOFT5 to program the complete DirectLOGIC family of
PLCs (the DL105 and DL305 series are the only PLCs that cannot be programmed
over Ethernet). Chapter 2 will indicate the CPUs which can be used with the ECOM
modules.
NOTE: We recommend using a dedicated network for your PLC control
applications. For more information see Chapter 2, Setup and Installation.
Ethernet Communications Modules, 3rd Edition Rev. C, 06/11
Introduction
PCs running our KEPDirect for PLCs software can establish Ethernet links for
exchanging information with DirectLOGIC 05/06/205/405 PLCs.
You can use a personal computer equipped with a 10/100BaseT or 10BaseFL
network adapter card and NetEdit3 software to configure the ECOM module over the
network. You can also use NetEdit3 for troubleshooting certain communication
problems. The NetEdit3 utility is included with this manual and is available for download
at http://www.automationdirect.com.
Ethernet Communications Modules, 3rd Edition Rev. C, 06/11
Introduction
Your Network PC
1--5
1--6
Introduction
Introduction
Frequently Asked Questions
Q. How can I speed up my ECOM communications?
A. Try shortening the scan time of the PLC (the PLC allows only one ECOM
transaction per scan).
Q. What causes “Task code error response” with extended E353 error?
A. Error is from the PLC and means “timeout in the background communications”.
Error is due to a backplane communication problem (ECOM, DCM, etc.).
Q. Can an ECOM be configured to talk through a gateway?
A. Yes. You configure the gateway to reroute traffic to and from the ECOM via port
7070 (hex).
Q. When using a DL205 with an ECOM, is there a way to turn on the PLC outputs from a computer
using a non--Windows operating system?
A. Host Engineering has what is called an Ethernet SDK (software developers kit)
which can normally be downloaded (free) from their website. However, this will be
useless for your system, but to accommodate your operating system, you can fill out
a form located on the Host Engineering website and request the source code for the
Ethernet SDK. This is necessary so that Host Engineering will know who is using
their source code. The source code can then be recompiled to work on your system.
With the SDK recompiled for your system, you can use CCM (i.e. DirectNET)
protocol to turn on PLC outputs by simply knowing the memory types and ranges as
required for syntax.
The request form and details about the SDK can be found on the Host Engineering
homepage (www.hosteng.com). Once there, click on “EBC/ECOM/EDRV” under
“S/W Developer Kits” in the left--hand column.
Q. What is the fastest way to get data from PLC to PLC?
A. Install ECOM in both PLCs and use the RX/WX commands is the quickest way to
do this. It is much faster that using serial communication.
Q. Can the ECOM do a broadcast message to multiple slave devices?
A. No.
Q. Can the MAC address be changed?
A. The MAC address is burned into ROM on the module and is set just before it
leaves the factory. There is no logical way for any protocol to change this address.
Host Engineering’s range for Ethernet (MAC) addresses is 00.E0.62.xx.xx.xx.
Ethernet Communications Modules, 3rd Edition Rev. C, 06/11
Setup and Installation
12
In This Chapter. . . .
— ECOM Network Identifiers
— Setting the Module ID with the DIP Switch
— Inserting the ECOM Module in the PLC Base
— ECOM Network Layouts
— Network Cabling
— Maximum Cable Length
— Maximum Number of ECOM Modules on the Network
2--2
Setup and Installation
ECOM Network Identifiers
Installation and
Safety Guidelines
Setup and
Installation
This section describes network identifiers that can be assigned to the ECOM
module. Each module must be assigned at least one unique identifier to make it
possible for PCs or other ECOMs to recognize it on the network. Four methods of
identifying the ECOM module give it the flexibility to fit most networking schemes.
The four ECOM identifiers are:
• Module ID
• Name
• IP (Internet Protocol) Address
• Ethernet (MAC) Address
The first three are user-selectable. The last one is set at the factory. Each of the
identifiers is discussed in this chapter. If you have more than a few ECOMs on your
network, consider making a chart or spreadsheet of network IDs, as shown below:
Ethernet (MAC) Address Module ID
00 E0 62 20 01 20
00 E0 62 20 01 58
00 E0 62 20 01 8D
00 E0 62 20 01 94
00 E0 62 20 01 DE
00 E0 62 20 01 F1
00 E0 62 20 01 FB
00 E0 62 20 01 F0
3
8
17
2
61
33
1
5
Name
IP Address
PumpStationTwo
Effluent
BldgThree
PumpStationOne
192.168.100.005
255.255.255.255
192.168.100.001
192.168.100.002
192.168.100.003
192.168.100.004
255.255.255.255
192.168.100.006
Control Room
Mixer
The decision about which type of identifier to use is an important one. Much of the
decision depends on the requirements of your particular application. PC-to-PLC
communications are generally better accommodated with one type of identifier while
PLC-to-PLC communications require a different type. Ease of maintenance and
troubleshooting also must be considered before deciding which type to use.
The identifiers are used to link your PC to your PLC or one PLC to another PLC. The
flexible design of the module allows you to use different identifiers for different links
to the same module. This is particularly important if you require both PC-to-PLC and
PLC-to-PLC communications on the same network.
The following table summarizes Network Identifiers and their uses:
How to Set
Format
Communication
Restrictions/Notes
DIP Switch
Number 1-63
PLC-to-PLC or
PC-to-PLC
Disables Module ID in
NetEdit3
NetEdit3
Number 1-90
PLC-to-PLC or
PC-to-PLC
DIP Switch must be set to “0”
NetEdit3
Number 1-999,999,999
PC-to-PLC Only
> 90 (Not for PLC-to-PLC )
Name
NetEdit3
32 Alphanumeric Characters
PC-to-PLC Only
HMI Software may have restrictions
IP Address
NetEdit3
4 Three-digit Numbers
xxx.xxx.xxx.xxx
(See Page 2-4)
PC-to-PLC; (PLC
to PLC--Client/
Server using TCP/
IP or MODBUS
TCP protocol)
See Your Network Administrator for IP address;
(refer to pages 3--10 to 3--11,
chapters 5 and 6)
Ethernet (MAC)
Address
Set at Factory
12 Hex digits
PC-to-PLC Only
Factory-assigned, for IPX
Module ID
Ethernet Communications Modules, 3rd Edition Rev C, 06/11
Setup and Installation
Module ID
2--3
A Module ID is required for PLC-to-PLC communications, and it can be set either of
two ways. You can assign the Module ID:
•
using the DIP switches on the module.
•
using the configuration tools in NetEdit3
•
HTML Configuration (after IP address is assigned to module using
NetEdit3; described in Chapter 5; H0/H2/H4--ECOM100 only)
Use the DIP switch if you want the ability to install or change modules without using a
PC to set the Module ID. Set the module’s DIP switch, insert the module in the base,
and connect the network cable. Your Module ID is set on powerup, and your ECOM
is ready to communicate on the network. We step through setting the DIP switch on
pages 2-5 and 2-6.
Setup and
Installation
1 2 3 4 5 6 7 8
ON
7 6 5 4 3 2 1 0
If you prefer to be able to set or change all Module IDs on your network from a single
PC, use the tools in NetEdit3, discussed in chapter 3.
Name
A Name makes it easy to recognize the PLC by its function. An example of a Name is
“PumpStationOne.” The Name can be up to 32 alphanumeric characters in length. A
Name can be assigned using NetEdit3.
Installation and
Safety Guidelines
P
L
C
E
C
O
M
Pump Station One
PUMP STATION ONE
NOTE: Some HMI software products will not accept Names with numbers as the first
character, spaces or certain other non-alphanumeric ASCII characters. Also, your
HMI product may not accept Names longer than 16 characters. Consult your HMI
product documentation about its naming conventions.
Ethernet Communications Modules, 3rd Edition Rev C, 06/11
2--4
Setup and Installation
Setup and
Installation
IP Address
An IP Address can be assigned to the ECOM module if your network requires one.
Usually, the IP Address is required in cases where PLCs are sharing the same
network with PCs, and some of the PCs are carrying out functions unrelated to PLC
control. Normally, a network administrator will assign an IP Address to each device
on the network. If you have a separate dedicated network for your PLCs, you can use
the Module ID or a Name for each communication link. You must use an IP Address,
if you are using the UDP/IP or MODBUS TCP protocol.
Use NetEdit3 to assign an IP address to the ECOM (refer to chapter 3).
The module ships from the factory with an IP Address of 0.0.0.0. This is not a usable
IP Address for normal communications. It only serves as a default setting which can
be changed using NetEdit3. The valid settings are 1 through 254. You do not have
to change the default IP Address unless you are using the IP Address to link to your
ECOM module. The default setting does not cause conflicts with other network
communications.
If you change the default IP Address for linking to other network devices, you must
change all four “0” fields. If any field contains the number 255 and other fields have
been changed, the module will not be recognized on the network.
Example
Valid Client (PC/ECOM) IP Address:
255.255.0.0
192.168.50.2
Valid Server ECOM IP Address:
192.168.55.5
Valid Server ECOM IP Address:
192.168.70.15
Client (PC/ECOM) Subnet Mask:
1--254
Valid settings for
Bold number fields
(Do not duplicate)
Installation and
Safety Guidelines
WARNING: It is extremely important not to have duplicate IP Addresses on
your network. If you are using the IP Address to link the ECOM to any network
devices (PCs or PLCs), the ECOM must have a unique number.
Ethernet (MAC)
Address
A unique Ethernet (MAC) Address is assigned to each module at the factory and will
not change. It is printed on a label attached to each ECOM module. The Ethernet
(MAC) Address is recognized by NetEdit3. The Ethernet (MAC) Address is a twelve
digit number with no deliberate relationship to your network or functional areas of
your plant. It does not usually serve as a convenient and easily remembered
identifier for your ECOM.
Factory-assigned Ethernet (MAC) Address
H0--ECOM
00 E0 62 20 20 36
Host Auto Prod
H2--ECOM
00 E0 62 20 00 84
Host Auto Prod
H4--ECOM
00 E0 62 20 00 85
You can use the IP Address to satisfy network requirements, a Name for PCs
Using Multiple
Network Identifiers running HMI software and the Module ID for PLCs to share data among themselves.
Using one type of identifier does not limit your use of the other identifier types.
Ethernet Communications Modules, 3rd Edition Rev C, 06/11
Setup and Installation
2--5
Setting the Module ID with the DIP Switch
You can use the DIP switch on the ECOM module to set the Module ID to a
number from one to sixty-three. Each module on a given network must be
assigned a unique Module ID if the Module ID is to be used for communications.
Do not use Module ID “0” for communications.
If the DIP switch is set to a number greater than 0, the software tools are disabled
from setting the Module ID. The software tools will only allow changes to the
Module ID if the DIP switch setting is 0 (zero, all switches OFF). The DIP switch
settings are read at powerup. You can use the software tools to set the Name and IP
Address even if you use the DIP switch for setting the Module ID.
H0 / H2 Series
ECOM DIP Switch
The ECOM’s DIP switches contain eight individual slide switches, but not all of these
are active. The individual slide switches are labeled 1 through 8 on the body of the
DIP switch (upside down in the following figures). You will find that the printed circuit
board is labeled 0 (zero) through 7. We use the labeling on the printed circuit board in
describing how to set the switch. The numbers on the printed circuit board indicate
the power of 2 represented by each slide switch. For example, switch 0 represents
20 (or 1), switch 1 is 21 (or 2), switch 2 is 22 (or 4), and so on. The following figures
show the binary value of each switch in parentheses ( ).
If using the ECOM/ECOM100 module with Dataworx software, or the ECOM100
with IBox Communication instructions, then Dipswitch 7 must be set to ON.
Setup and
Installation
WARNING: Using duplicate Module IDs on a single network will cause
unreliable PLC-to-PLC communications.
Ignore these numbers
4
3
5
6
8
7
Not
Used
5 4
. .
25 24
. .
(32)(16)
2
6
1
7
3.
23
.
(8)
2.
22
.
(4)
1.
21
.
(2)
0
.
20
.
(1)
Binary Value
The numbers (0--7) printed on the circuit
board indicate the power of 2 represented
by each slide switch.
The Module ID equals the sum of the binary values of the slide switches set in the ON
position. For example, if you set slide switches 1, 2, and 3 to the ON position, the
Module ID will be 14. This is found by adding 8+4+2=14. The maximum value you can
set on the DIP switch is 32+16+8+4+2+1=63. This is achieved by setting switches 0
through 5 to the ON position.
Ethernet Communications Modules, 3rd Edition Rev C, 06/11
Installation and
Safety Guidelines
Only used for
Dataworx or IBox
Communications
Instructions.
ON
2--6
Setup and Installation
H4--ECOM (--F)
Ignore these numbers
ON
3
4
5
6
1
7
0
8
Setup and
Installation
2
2
Installation and
Safety Guidelines
1
3
Binary Value
4
.
.
22 21
.
.
(4) (2)
5
.
23
.
(8)
6
. .
25 24
. .
(32)(16)
7
Not Used
.
20
.
(1)
The numbers (0--7) printed on the
circuit board indicate the power of
2 represented by each slide switch.
The Module ID equals the sum of the binary values of the slide switch set in the ON
position. For example, if you set slide switches 0, 1, and 3 to the ON position, the
Module ID will be 11. This is found by adding 8+2+1=11. The maximum value you can
set on the DIP switch is 32+16+8+4+2+1=63. This is achieved by setting switches 0
through 5 to the ON position.
NOTE: When all the switches are set to OFF (Module ID = 0), the Module ID can be
set using the software utilities in NetEdit and DirectSOFT. Do not use
Module ID “0” for normal communications. It is okay to leave the Module ID set at
zero if you are using the Name or IP Address for communications.
Ethernet Communications Modules, 3rd Edition Rev C, 06/11
Setup and Installation
2--7
Inserting the ECOM Module in the PLC Base
H0 Series ECOM
Before installing the option module in the DL05 option slot or any of the DL06 option
Module Installation slots, set the Module ID dip switch (if your application requires this) on the H0 Series
ECOM module. The next step is to remove the protective option slot cover. Remove
the cover by squeezing the pinch tabs and lifting the cover off.
Pinch Tabs
PWR
RUN
CPU
TX1
RX1
TX2
RX2
C0 X1 X3 X4 X6 C2 X11 X13X14 X16 C4 X21 X23N.C.
X0 X2 C1 X5 X7 X10 X12 C3 X15 X17 X20 X22 N.C.
TERM
PORT1
PORT2
RUN STOP
Now, insert the module into the open slot on the DL05 or into any one of the four slots
in the DL06. Locate the module so the printed information is oriented in the same
direction as the markings on the PLC. Be careful to align the female connector on the
printed circuit board of the module with the male connector on the PLC mother
board. Press the module into the slot until the front of the module is flush with the
front of the PLC. Check the DL06 power budget to be sure that it remains within the
power supply limits before installing more modules.
The DL205 system supports placement of the ECOM module in the CPU-base only,
not in local expansion bases or remote I/O bases. The number of usable slots
depends on how many slots your base has. The module does not work in slot 0 of the
DL205 series PLCs, the slot next to the CPU. The D2--240, D2--250--1 and D2--260
CPUs support the ECOM modules. The D2--230 CPU does not support the ECOM
modules.
205
CPU
Slot 0
Slot 1 Slot 2
Slot 3
Slot 4
No!
WARNING: Your system can be damaged if you install or remove system
components before disconnecting the system power. To minimize the risk of
equipment damage, electrical shock, or personal injury, always disconnect
the system power before installing or removing any system component.
Ethernet Communications Modules, 3rd Edition Rev C, 06/11
Installation and
Safety Guidelines
DL205 Slot
Choices
Setup and
Installation
G LG 0V Y0 Y2 C1 Y5 Y7 Y10 Y12 C3 Y15 Y17
AC(L) AC(N) 24V C0 Y1 Y3 Y4 Y6 C2 Y11 Y13 Y14Y16 N.C.
50 -- 60Hz
2.0A,6 -- 27V 2.0A PWR: 100--240V
50--60Hz
40VA
OUTPUT: 6--240V
Y 0 1 2 3 4 5 6 7 10 11 12 13 14 15 16 17 20 21 22D0--06DR
23
X
INPUT: 12 -- 24V
3 -- 15mA
2--8
Setup and Installation
Module Type
H2--ECOM
H2 ECOM100
H2--ECOM100
H2--ECOM--F
H2 Series ECOM
Module Installation
CPU
DL240
DL250 1
DL250--1
DL260
CPU-Base
Usable Slots
D2--03B--1, D2--03BDC1--1, D2--03BDC--2
1
D2--04B--1, D2--04BDC1--1, D2--04BDC--2
1, 2
D2--06B--1, D2--06BDC1--1, D2--06BDC2--1
1, 2, 3, 4
D2--09B--1, D2--09BDC1--1, D2--09BDC2--1
1, 2, 3, 4, 5, 6, 7
205
Setup and
Installation
Retaining Clips
To install the ECOM module, line up the module’s printed circuit board with the
grooves in the base and push the module until it is flush with face of the DL205 base
power supply. If you feel more than moderate resistance when you push the module
into the base, the circuit board may not be aligned with the grooves in the base.
When the module is firmly seated in the slot, depress the top and bottom retaining
clips to lock the module in place.
Installation and
Safety Guidelines
NOTE: When adding modules to your PLC always confirm that your power budget
will accommodate the added module. See the User Manual for your PLC for more
information about calculating the power budget. See Appendix A for the power
consumption of the ECOM modules.
Ethernet Communications Modules, 3rd Edition Rev C, 06/11
Setup and Installation
DL405 Slot
Choices
2--9
For PLC systems with D4--430 and D4--440 CPUs, the ECOM modules can reside in
any I/O slot but only in the CPU-base. The D4--450 CPU allows the installation of the
ECOM module in the CPU-base or in local expansion bases.
If the ECOM module is used in a local expansion base, all bases in the system must
be the “--1” type bases. The valid part numbers for these bases are D4--04B--1,
D4--06B--1, and D4--08B--1. The “--1” on the end of the part number indicates that the
base supports specialty modules including the ECOM. The “--1” bases can be
connected as local expansion bases or remote bases. They are not the same
thing. Remote bases do not support the ECOM modules.
405
Slot 0
Slot 1
Slot 2
Slot 3
Setup and
Installation
CPU
WARNING: Your system can be damaged if you install or remove system
components before disconnecting the system power. To minimize the risk of
equipment damage, electrical shock, or personal injury, always disconnect
the system power before installing or removing any system component.
Module Type
Base
D4--430/440
D4--450
D4--450
D4--04B, D4--04B--1
Usable CPU-Base
Slots
0, 1, 2, 3
Usable Expansion
Base Slots
N/A
D4--06B, D4--06B--1
0, 1, 2, 3, 4, 5
N/A
D4--08B, D4--08B--1
0, 1, 2, 3, 4, 5, 6, 7
N/A
D4--04B
0, 1, 2, 3
N/A
D4--06B
0, 1, 2, 3, 4, 5
N/A
D4--08B
0, 1, 2, 3, 4, 5, 6, 7
N/A
D4--04B--1
0, 1, 2, 3
0, 1, 2, 3*
D4--06B--1
0, 1, 2, 3, 4, 5
0, 1, 2, 3, 4, 5*
D4--08B--1
0, 1, 2, 3, 4, 5, 6, 7
0, 1, 2, 3, 4, 5, 6, 7*
* You must use the “--1” base for the CPU-base and all local expansion bases.
NOTE: Before installing the ECOM module, confirm that your power budget will
accommodate the added module. See the DL205 or DL405 User Manual for your
PLC for more information about calculating the power budget. See Appendix A for
the power consumption of the ECOM modules.
Ethernet Communications Modules, 3rd Edition Rev C, 06/11
Installation and
Safety Guidelines
H4--ECOM
H4 ECOM100
H4--ECOM100
H4--ECOM--F
CPU
2--10
Setup and Installation
H4 Series ECOM
To insert the ECOM module in a DL405 base, place the bottom tab of the module into
Module Installation the notch at the bottom of the base. Pivot the module toward the base as shown
below. Ensure that each module is tightly seated and secured with the captive screw
at the top of the module.
Setup and
Installation
DL405 Base
Disconnect power before installing module!
Installation and
Safety Guidelines
ECOM Network Layouts
The ECOM Ethernet network is a peer-to-peer network. Using Read (RX) or Write
(WX) instructions, any PLC on the network can initiate communications with any
other PLC on the network. A PC running our KEPDirect for PLCs software can also
initiate communications with any ECOM that is on the same network, but a PLC
cannot initiate communication with the PC. A PLC cannot literally broadcast to all
other PLCs at the same time, but a PLC can sequence through communication
connections with each other PLC on the network, one at a time.
The ECOM products inherently support two network layouts: point-to-point and star.
The point-to-point layout can be used to link together two PLCs or a PC and a PLC. A
hub or repeater connects multiple networkable devices into a star topology. Multiple
hubs or repeaters are used to modify the star topology so that it becomes a
star-bus-star topology. See the figures below and on the next page.
Point-to-Point
Ethernet Communications Modules, 3rd Edition Rev C, 06/11
Setup and Installation
Hub or Repeater
Star Topology
2--11
10/100BaseT
or
10BaseFL
Setup and
Installation
Hubs or repeaters can connect together to make it possible to connect more devices
to the network or to extend the range of the network.
10BaseT
or
10BaseFL
Any Backbone
Star-Bus-Star Topology
NOTE: Hubs or repeaters often designate one port for uplink to another hub. This
port may not be able to be used to connect to a PLC. If the uplink port is used to
connect to another hub, it may disable the adjacent port. Use of the uplink port may
require the use of a crossover cable.
Ethernet Communications Modules, 3rd Edition Rev C, 06/11
Installation and
Safety Guidelines
Hub or Repeater
10Base2
10Base5
10BaseT
100BaseT
10BaseFL
2--12
Setup and Installation
Network Cabling
ECOM Supports
Two Standards
Two types of ECOMs are available. One type supports the 10/100BaseT cabling
standard, and the other supports the 10BaseFL connection standard. The
10/100BaseT standard uses twisted pairs of copper wire conductors, and the
10BaseFL standard is for fiber optic cabling.
10/100BaseT
10BaseFL
Setup and
Installation
Unshielded
Twisted-Pair
cable with RJ45
connectors
10/100BaseT
Networks
62.5/125 MMF
fiber optics cable
with ST-style
connectors
The cable used to connect a PLC (or PC) to a hub or repeater is called a patch
(straight-through) cable. The cable used to connect together two PLCs, or a PC and
a PLC or two hubs is a crossover cable. We recommend that you purchase cables
pre-assembled with connectors for convenient and reliable networking.
Installation and
Safety Guidelines
Patch (Straight--through) Cable
10/100BaseT
TD+ 1
TD-- 2
RD+ 3
4
5
RD-- 6
7
8
OR/WHT
OR
GRN/WHT
BLU
BLU/WHT
GRN
BRN/WHT
BRN
RJ45
OR/WHT
OR
GRN/WHT
BLU
BLU/WHT
GRN
BRN/WHT
BRN
1
2
3
4
5
6
7
8
TD+
TD-RD+
RD--
RJ45
Crossover Cable
1 2 3 4 5 6 78
8-pin RJ45 Connector
(8P8C)
TD+ 1
TD-- 2
RD+ 3
4
5
RD-- 6
7
8
OR/WHT
OR
GRN/WHT
BLU
BLU/WHT
GRN
BRN/WHT
BRN
RJ45
GRN/WHT
GRN TD+ 1
OR/WHT TD-- 2
RD+ 3
BLU
4
BLU/WHT
5
OR
RD-- 6
BRN/WHT
7
BRN
8
RJ45
This diagram illustrates the standard wire positions in the RJ45 connector.
We recommend all ECOM 10/100BaseT cables to be Category 5, UTP
cable.
Ethernet Communications Modules, 3rd Edition Rev C, 06/11
Setup and Installation
10/100BaseT
Connections
UTP Cable
2--13
Most 10/100BaseT hubs or repeaters use a patch (straight-through) cable for
connecting the network devices (PLCs or PCs). For hub-to-hub connections a
crossover type cable is commonly required. The figures on the previous page show
pin assignments and insulation color codes for patch (straight-through) and
crossover type Ethernet cables.
The ECOM has an eight-pin modular port that accepts RJ45 type connectors. UTP
(Unshielded Twisted-Pair) cable is rated according to its data-carrying ability
(bandwidth) and is given a “category” number. We strongly recommend using a
category 5 cable for all ECOM connections.
NOTE: See page 2--14 for 10/100BaseT distance limitations.
Fiber Optic Cable
Fiber Optic Module
ST Connector
Each module has two bayonet ST-style connectors. The ST-style connector uses a
quick release coupling which requires a quarter turn to engage or disengage. The
connectors provide mechanical and optical alignment of fibers.
Each cable segment requires two strands of fiber: one to transmit data and one to
receive data. The ST-style connectors are used to connect the H2--ECOM--F or
H4--ECOM--F module to another H2--ECOM--F or H4--ECOM--F module or a fiber
optic hub or repeater.
The H2--ECOM--F and H4--ECOM--F modules accept 62.5/125 multimode fiber
optic (MMF) cable. The glass core diameter is 62.5 micrometers and the glass
cladding is 125 micrometers. The fiber optic cable is highly immune to noise and
permits communications over much greater distances than 10BaseT.
Multimode Fiber Optic (MMF) Cable
Fiber cross-section
Ferrule
Transmit
Sheathing
Receive
Transmit
Cladding
Connecting Two
Fiber Optic ECOMs
Transmit
Receive
Receive
NOTE: See page 2--14 for 10BaseFL distance limitations.
Ethernet Communications Modules, 3rd Edition Rev C, 06/11
Installation and
Safety Guidelines
Core
62.5/125 MMF cable with
bayonet ST-style connectors
Setup and
Installation
10BaseFL
Connections
2--14
Setup and Installation
Maximum Cable Length
The maximum distance per 10/100BaseT cable segment is 100 meters or 328 feet.
Repeaters extend the distance. Each cable segment attached to a repeater can be 100
meters. Two repeaters connected together extend the total range to 300 meters.
10/100BaseT Distance Limitations
Setup and
Installation
100 meters
(328 feet)
100 meters
(328 feet)
100 meters
(328 feet)
100 meters
(328 feet)
100 meters
(328 feet)
Between
Repeaters
The maximum distance per 10BaseFL cable segment is 2,000 meters or 6,560 feet.
Installation and
Safety Guidelines
Repeaters extend the distance. Each cable segment attached to a repeater can be 2,000
meters. Two repeaters connected together extend the total range to 6,000 meters.
10BaseFL Distance Limitations
2,000 meters
(6,560 feet)
2,000 meters
(6,560 feet)
2,000 meters
(6,560 feet)
2,000 meters
(6,560 feet)
Between
Repeaters
Ethernet Communications Modules, 3rd Edition Rev C, 06/11
2,000 meters
(6,560 feet)
Setup and Installation
2--15
Maximum Number of ECOM Modules on the Network
The maximum number of nodes that can be connected to a 10/100BaseT or
10BaseFL network is a function of the topology used in constructing the network.
Therefore, it is not possible to state an absolute maximum number of nodes that
would apply in all cases.
You must take into consideration the network limitations imposed by all cabling and
network devices. Consider the limitations imposed on your network if your network
uses:
• a combination of cabling standards, such as 10/100 BaseT and
10Base2, or
• intermediate devices, such as switches or routers.
Setup and
Installation
The IEEE 802.3 specification defines the maximum node limit for an Ethernet
segment in terms of the ability to detect and avoid data collisions. A “legal” network
can have any number of devices provided that they can:
• detect all data collisions that may occur during the communication
process and
• respond to these collisions appropriately.
Each ECOM module can be assigned a Module ID ranging from 1 to 999,999,999.
Theoretically, you could have this many Ethernet modules coexisting on a single
network. Other network limitations would restrict the network size before reaching
this limit. For the majority of network PLC applications there is practically no limit to
the number of ECOM modules you can access from the NetEdit3, DirectSOFT
Programming Software or the KEPDirect for PLCs software.
There is a node limit for PLC-to-PLC communications. The network Read and Write
instructions performed by the initiating (master) PLC are only capable of accessing
PLCs with Module IDs of 1 through 90. This effectively sets the maximum number of
nodes available for PLC-to-PLC communications at 90.
Ethernet Communications Modules, 3rd Edition Rev C, 06/11
Installation and
Safety Guidelines
WARNING: We recommend against connecting Ethernet modules to the same
network that serves as your primary office network. While Ethernet networks
can handle a very large number of data transmissions, and normally handle
them very quickly, heavy Ethernet traffic can adversely affect the reliability
and speed of the network.
Configuring ECOMs
Using NetEdit3
In This Chapter. . . .
— NetEdit3 Software
— Using NetEdit3
— Locating the MAC Address Label
3
3--2
Using NetEdit3
NetEdit3 Software
NetEdit3 is a software utility which can be used to set network identifiers (Module ID
or IP Address), perform diagnostic and troubleshooting tasks and upgrade the
firmware in the ECOM module if necessary. The H0/H2/H4--ECOM100 requires
NetEdit 3.5 or later.
You can install NetEdit3 on Windows98/ME/2000/XPt or Windows NT4t. NetEdit3
is included with this manual on the AutomationDirect Software Product Showcase
CD (also available online at www.automationdirect.com). After inserting the CD into
the drive, the following window will appear.
Using
NetEdit3
Installing NetEdit3
Installation and
Safety Guidelines
Click on the Essential Tools button. The following window will be displayed.
Click on Install NetEdit3. A series of windows will step you through the installation
process. Fill in the necessary information as the installation wizard prompts through
the install. In the Setup Type window, select Typical setup. This setup type is
recommended for most users. The installation process places NetEdit3 in the
C:\HAPTools directory (default).
Ethernet Communications Modules, 3rd Edition Rev. C, 06/11
Using NetEdit3
3--3
There are three methods to launch NetEdit3.
The three methods are:
• using the Windows Start menu Programs>AutomationDirect Tools>
NetEdit3 as shown below
• launching DirectSoft (if installed), from the programming window, select
PLC>Tools>NetEdit3
• launching DirectSoft (if installed), then select Utilities>NetEdit3
The NetEdit3
Screen
Starting NetEdit3 brings up the screen below. All NetEdit3 functions are accessed
from this screen.
Using
NetEdit3
Launching
NetEdit3
Installation and
Safety Guidelines
Ethernet Communications Modules, 3rd Edition Rev. C, 06/11
3--4
Using NetEdit3
Adding Network
You may have already set up your PC with selected networking protocols for
Protocol Support Ethernet communications. If not, you will need to select the protocols now for
to the NetEdit3 PC communication with the Ethernet modules. We strongly recommend that you
include the IPX protocol. For Windows 2000, go from My Computer on your
Windows desktop to Control Panel. Double click on Network and Dial--up
Connections, then double click on the desired Network Device to see the installed
Protocols. If IPX is not listed among the protocols already loaded, add it now by
clicking on the Install button. For Windows XP, go from Start>Settings>Control
Panel. The steps are the same as Windows 2000 from this point.
Add the TCP/IP protocol if it is necessary for your application. The TCP/IP selection
will give you support for the UDP/IP protocol. Also, add the IPX protocol if it is not
already active.
NOTE: We strongly recommend you load IPX protocol on your PC for the connection
from your PC to the ethernet modules. Use UDP/IP in your application, if required,
but also add IPX to your list of active protocols. Having IPX loaded on your PC gives
you a backup for troubleshooting communication problems.
Installation and
Safety Guidelines
Using
NetEdit3
→
→
Ethernet Communications Modules, 3rd Edition Rev. C, 06/11
Using NetEdit3
3--5
Using NetEdit3
This section steps through the features and uses of NetEdit3. We will describe the
individual segments of the NetEdit3 screen and the function of each.
NOTE: Your PC-based Control software may be capable of configuring the EBC
module. If so, please refer to the appropriate documentation for that software
product to determine the best method to configure the EBC. Depending on which
software you are using, it may not be necessary to use NetEdit3.
Ethernet
Communication
Protocol
In the upper left corner of the NetEdit3 screen, you will find buttons labeled IPX and
TCP/IP. The ECOM module understands these protocols. Both protocols are
permanently resident in the firmware of the module.
When you click on one of these buttons, you are selecting the protocol you want your
PC to use to communicate with the ECOM module. You are not telling the module
which protocol to use, because it is using both protocols all the time. IPX is a Novell
standard in widespread use, and UDP/IP is a popular protocol supported by the
TCP/IP suite of protocols in your PC.
Ethernet Communications Modules, 3rd Edition Rev. C, 06/11
Installation and
Safety Guidelines
Some PC-based control software
products may support only one of
these
protocols.
Read
the
documentation for your software to be
sure the protocol you select is
supported.
Using
NetEdit3
The figure to the right shows the
Protocol selection buttons in the upper
left corner of the NetEdit3 screen. The
choice you make here tells your PC
which protocol to send to the ECOM to
link NetEdit3 to the module.
3--6
Using NetEdit3
Ethernet Address
The upper left section of the NetEdit3
screen
displays
the
Ethernet
Address of the modules currently on
the network.
If modules are added or removed from
the network, click on the Scan Network
button
to
update
the
list.
Notice that the MAC Address is the
factory-assigned address that is on the
permanent label on the module.
Select a specific module here by
clicking on the MAC Address or by
using the arrow keys. The selected
module is highlighted.
Using
NetEdit3
NOTE: The Module window may list the MAC Addresses of devices not covered by
this manual.
Module Type, IP
Address and ID
Installation and
Safety Guidelines
The upper mid section of the NetEdit3 screen displays the Module Type,
IP Address, module ID, Name and Description of the modules currently
on the network.
A new ECOM will have an IP Address of 0.0.0.0, a Module ID of 0 (zero),
and no Module Name or Description. To assign or change a module an
IP address, ID, name or description refer to the EBC Settings>General
Information description later in this section.
Right clicking on an ECOM module
listed on the NetEdit3 screen will
display the window to the right. This is
an alternative to using the Module Info
or ECOM settings tabs (shown below)
to access the module’s configuration
settings. The settings are discussed
later in this section.
Ethernet Communications Modules, 3rd Edition Rev. C, 06/11
Using NetEdit3
Module Info>
General
Information
When the Module Info tab is selected, the General Info box lists the
selected module’s Firmware Revision, Booter Revision, DIP Switch
Setting, PWB Revision, PLD Revision and CPU Revision.
This box is in the lower left section of the NetEdit3 screen.
Module Info>
Ethernet Stats
When the Module Info tab is selected, the
Ethernet Stats box displays statistics related
to the selected module’s communication
errors. Click on the Reset Stats button to reset
all categories to 0 (zero).
3--7
When the ECOM Settings tab is selected, the selected module’s
Configuration, Utilities and Firmware tools can be accessed.
This box is in the lower middle section of the NetEdit3 screen.
Ethernet Communications Modules, 3rd Edition Rev. C, 06/11
Installation and
Safety Guidelines
ECOM Settings
Using
NetEdit3
This box is in the lower middle section of the
NetEdit3 screen.
3--8
Using NetEdit3
ECOM Settings>
Configuration>
General
The General Settings box allows you to assign a Module ID. Module IDs must
be unique for each ECOM, but they do not have to be in sequence. The
module’s DIP switches must be set to zero to allow NetEdit3 to set a Module
ID. Do not use address zero for communications.
Using
NetEdit3
Installation and
Safety Guidelines
Clicking the General button in the ECOM
Settings>Configuration box brings up the General
Settings window below.
The Name field and Description field are optional.
To set an IP Address, highlight the number in each of the four boxes, and
overwrite the number. Use the twelve-digit number assigned to the ECOM
module by your network administrator. If you change the IP Address, do not use
the number “255” in any field. Doing so will cause communication problems.
The OK button sends all the entries to the module’s flash memory.
The following table summarizes NetEdit3’s Network Identifiers and their uses:
How to Set
Format
Communication
Restrictions/Notes
DIP Switch
Number 1-63
PLC-to-PLC or
PC-to-PLC
Disables Module ID in
NetEdit3
NetEdit3
Number 1-90
PLC-to-PLC or
PC-to-PLC
DIP Switch must be set to “0”
NetEdit3
Number 1-999,999,999
PC-to-PLC Only
> 90 (Not for PLC-to-PLC )
Name
NetEdit3
32 Alphanumeric Characters
PC-to-PLC Only
HMI Software may have restrictions
IP Address
NetEdit3
4 Three-digit Numbers
xxx.xxx.xxx.xxx
(See Page 2-4)
PC-to-PLC; (PLC
to PLC--Client/
Server using TCP/
IP or MODBUS
TCP protocol)
See Your Network Administrator for IP address;
(refer to pages 3--10 to 3--11,
chapters 5 and 6)
Ethernet (MAC)
Address
Set at Factory
12 Hex digits
PC-to-PLC Only
Factory-assigned, for IPX
Module ID
Ethernet Communications Modules, 3rd Edition Rev. C, 06/11
Using NetEdit3
ECOM Settings>
Configuration>
Advanced
3--9
Clicking the Advanced button in the ECOM
Settings>Configuration box brings up the
ECOM Advanced Settings window below.
Ethernet Communications Modules, 3rd Edition Rev. C, 06/11
Installation and
Safety Guidelines
The K--Sequence Retries field shows the number of times the backplane
transmission between ECOM and CPU is to be retried.
The OK button loads the communication settings in the ECOM module’s flash
memory.
Using
NetEdit3
RX/WX -- Settings box in this window provides a
place to make changes that affect PLC-to-PLC
communications.
ACK Timeout -- sets the time limit for receiving
the acknowledge (ACK) response to an RX or WX
instruction. The ECOM sends a message across
the LAN. The acknowledge response comes back
directly from the ECOM module receiving the
transmission. This timeout is the maximum for
transmission and acknowledgement from ECOM
to ECOM across the LAN. It is not dependent on
the PLC scan time.
Resp. Timeout -- sets the maximum time for the
receiving PLC CPU to respond to the ECOM that
initiated the communication. The instruction has
travelled from the initiating PLC CPU to the
initiating ECOM, across the Ethernet LAN to the receiving ECOM, then to the
receiving PLC CPU, and back again to the initiating ECOM. Multiple PLC scans
may be required to execute an RX/WX instruction so the Resp. Timeout should
allow for multiple scans. Also, communication errors may result in retries which
require more time. Your response timeout setting must accommodate retries as
well.
The WX/RX Retries field shows the number of times the ECOM will retry
transmissions to the network.
3--10
Using NetEdit3
ECOM Settings>
Configuration>
Peer to Peer
This function allows you to configure the client H0/H2/H4--ECOM(100) module to
use an IP protocol packet to perform the RX/WX instruction, as opposed to a
broadcast packet to locate the slave ECOM or MODBUS TCP server.
Chosing Peer to Peer: The following are reasons or conditions of when to configure
the H0/H2/H4--ECOM(100) for peer to peer communications with a TCP/IP server
device:
• To eliminate network broadcast traffic when the ECOM(100) is a client
executing RX/WX network instructions.
•
When an ECOM(100) is an “ECOM protocol client” and needs to access
other server ECOMs through a router.
•
When an ECOM100 needs to serve as MODBUS TCP client
Installation and
Safety Guidelines
Using
NetEdit3
Clicking the Peer to Peer Config button in the
ECOM Settings>Configuration box brings up
the Peer to Peer Configuration window shown
below. Any previous peer to peer
configurations will be listed in the table.
The RX and WX ladder logic
instructions used by the PLC
allow you specify a Node
(Device) Number as the slave
identifer in the range of 1--87.
The Peer to Peer Configuration
information is stored in the
ECOM(100) module’s flash
memory.
This
basically
associates a Device Number
(that is used by the RX/WX
instructions) with a server’s IP
address.
Clicking on the Add button in the Peer to
Peer Configuration window will display
the Add Device Address window shown
to the right. Enter the necessary server’s
network information (i.e. Device Number,
server’s IP address and protocol). You
can manually enter the information or you
can click on the Find Hx--ECOM button to
display all local ECOMs currently on the
network. MODBUS TCP device’s
network information will have to be
entered manually. Refer to page 6--6 for
information on Port and Unit ID Numbers.
Clicking the OK button adds the Device
Configuration to the main peer to peer
configuration screen. Be certain not to
duplicate Device Numbers.
Ethernet Communications Modules, 3rd Edition Rev. C, 06/11
Using NetEdit3
3--11
Clicking on the Find Hx--ECOM
button in the Add Device Address
window will display the Select
ECOM window shown to the right.
Highlight the server ECOM that
you intend to communicate with
peer to peer via the client
ECOM(100) module. Then click
the OK button. This will add the
ECOM’s Device Configuration
information to the previous Add
Device Address window.
Once the module’s network information is in the Add Device Address window
(previous page), click the OK button to add the information to the main Peer to
Peer Configuration window. Repeat the steps to add other ECOMs to the
configuration. Clicking the OK button on the main screen window writes the
module(s) network information to the ECOM(100)’s flash memory.
Using
NetEdit3
Installation and
Safety Guidelines
Ethernet Communications Modules, 3rd Edition Rev. C, 06/11
3--12
Using NetEdit3
ECOM Settings>
Utils>Test CPU
Access
Clicking the Test CPU Access button in the
ECOM Settings>Utilities box brings up the
window shown below.
The ECOM has two distinct “sides”, the network side, which contains the network
configuration settings, and the backplane side, which the ECOM uses to
communicate with the PLC CPU. It is possible that only one side could be operating
correctly, while the other side is not. The Test CPU Access function will test the
connection from your PC to the ECOM module through the network side, across the
backplane to the PLC CPU and back to your PC.
Installation and
Safety Guidelines
Using
NetEdit3
ECOM Settings>
Firmware
The functions in the Firmware box are used
to update the selected module’s Firmware
and Booter versions. The Restore Factory
Settings buttons resets the selected
module’s IP address, ID, Name and
Description to factory defaults. Refer the
sections on the next page to determine if
updates are necessary.
Clicking on the either of the Update
buttons opens the appropriate ECOM
folder within the Images folder, which
is created during the install of
NetEdit3. The Images folder is located
in the same folder as NetEdit3.exe.
Each module folder contains the
module’s firmware and boot loader
files. The next section discusses
keeping the firmware files up to date.
Ethernet Communications Modules, 3rd Edition Rev. C, 06/11
Using NetEdit3
FileMenu>
Live Update
3--13
The Live Update will retrieve the latest firmware
and boot loader files from the Host Engineering
web site and place them in the NetEdit3 Images
folder that was created during the install of
NetEdit3. The feature requires that you have a
functional Internet connection (dial--up or
broadband). If the Images folder does not exist
on your PC, it will be created as part of the
retrieval process.
F/B/C
Columns
The “F” column will display an
asterick beside any device whose
firmware is older than its firmware file
in your Images folder.
The “B” column will display an asterick beside any device whose boot loader is
older than its boot loader file in your Images folder.
The “C” column will display an asterick beside any device that has a
configuration conflict with another device on the network. Duplicate module IDs
(that are non--zero) and duplicate IP Addresses (that are not 255.255.255.255)
will report as conflicts.
Ethernet Communications Modules, 3rd Edition Rev. C, 06/11
Installation and
Safety Guidelines
The F, B, and C columns are provided
to signify potential issues with
devices on the network.
Using
NetEdit3
When you click the Go! button
on the Live Update window,
NetEdit3 will compare the
version information of the files
on the Host Engineering web
site against the files you have
locally on your PC, and it will
download any newer files. Once
this process is complete,
NetEdit3 will rescan the devices
on your network and refresh the
“F” and “B” columns next to the
listed devices.
1
RLL Programming for
Communications
4
In This Chapter. . . .
— PLC-to-PLC Communications
— How RLL is Used for Communications
— Network Instructions
— Addressing the Different Memory Types
— Special Relays for Communications
— Example Program with One Read Instruction
— Example Program with One Write Instruction
— Integrating Multiple Read and Write Instructions
4--2
RLL Programming for Communications
Getting Started
PLC-to-PLC Communications
This chapter steps you through the development of a Relay Ladder Logic (RLL)
program to enable one PLC to communicate with another PLC. For the experienced
programmer of DirectLOGIC PLCs, the communication programs presented in this
chapter will be simple to follow. If you have never programmed a DirectLOGIC PLC,
you may want to refer to the DirectSOFT Programming Software User Manual and
the User Manual for your PLC for additional information.
NOTE: The programs described in this chapter are not used for communication
between a PC and a PLC. For PC-to-PLC communications, please see the product
documentation for the PC software you are using. If you are using our DSData
Server software, the manual you will need is the KEPDirect for PLCs User Manual.
How RLL is Used for Communications
User Application
Guidelines
DirectSOFT Programming Software provides Read and Write instructions
(RX/WX) for PLC-to-PLC communication over a network. The Read and Write
instructions are part of the ladder logic program running in the CPU of the initiating,
or master, PLC. These instructions tell the initiating CPU to send a message over the
Ethernet network to a responding, or slave, PLC. The ECOM module is the
connecting point to the network for each PLC. The initiating PLC’s Read or Write
communication finds its destination by the Module ID of the responding PLC’s
ECOM module. See Chapter 2 and 3 for information about assigning Module IDs.
RLL Programming
for Communications
Module ID 3
CPU
O
U
T
P
U
T
E I
C N
O P
M U
T
CPU
O
U
T
P
U
T
Wr i te
Re a d
Initiating PLC
CPU
I E
N C
P O
U M
T
Module ID 14
I
N
P
U
T
O
U
T
P
U
T
CPU
I E
N C
P O
U M
T
Responding PLC
Hub
O
U
T
P
U
T
Module ID 9
O
U
T
P
U
T
CPU
I
N
P
U
T
E
C
O
M
O
U
T
P
U
T
Module ID 20
In the figure above, the initiating PLC sends a Read or Write message to the
responding PLC’s ECOM module which is designated as “Module ID 14.” The
responding PLC processes the message. Any one of the PLCs could initiate
communication with any one of the others.
Ethernet Communications Modules, 3rd Edition Rev. C, 06/11
RLL Programming for Communications
4--3
Network Instructions
Read (RX) and
Write (WX)
Instructions
The Read (RX) and Write (WX) instructions are used by the initiating PLC to Read a
block of data from another PLC or Write a block of data to another PLC. To perform
their functions, the RX and WX boxes must be preceded in the ladder logic program
by two Load instructions and one Load Address instruction.
The Load and Load Address instructions load communication parameters into the
accumulator and the first and second level of the accumulator stack. The RX or
WX instruction takes these parameters from the stack and the accumulator and
prepares the data to be sent over the network. If you need to know more about the
function of the accumulator and the accumulator stack, refer to the User Manual for
your PLC.
Building the
Read (RX) or
Write (WX)
Routine
For network communications, you build
the Read (RX) or Write (WX) instructions
into a routine which requires the four
instructions you see to the right. The
function of each of these instructions is
explained below or on the next page. They
must be used in the sequence shown.
LD
A aaa
LD
A aaa
O aaa
RX or WX
A aaa
The First LD
Instruction
Upper Byte
Lower Byte
Initiating PLC
(Master)
Base Number
CPU Base = 0
Expansion Base = 1, 2 or 3
See page 2-7 and 2--9 about using ECOMs in local expansion or
in remote I/O bases.
K 0 1 1 4
Responding PLC
LD
K114
(Slave)
ECOM Slot Number
Initiating PLC
See page 2-7 and 2-8 about
slot numbers.
ECOM Module ID
Responding PLC
See page 2-3 and 3--8 about
setting the Module ID.
Ethernet Communications Modules, 3rd Edition Rev. C, 06/11
RLL Programming
for Communications
The first Load (LD) instruction accepts either a constant or a variable. Use a “K” to
designate the number as a constant. Use a “V” if you are entering the address of a
register. The contents of that register perform the same function as the constant
shown below. For example, you could use V2000 in place of K0114. If the contents of
V2000 is the number “114,” the function would be the same. Using a variable allows
changing parameters while the program is running. It is recommended, however, to
use a constant when possible.
User Application
Guidelines
LDA
Getting Started
4--4
RLL Programming for Communications
The Second LD
Instruction
The second Load (LD) instruction
determines the length of the data block to
be transmitted during the Read or Write
communication. This instruction will also
accept two data types. Use a “K” to
designate the number as a constant. Use a
“V” if you are entering the address of a
register.
For Word Memory data, you must use a
multiple of two bytes between 2 and 128.
For Bit Memory data, you can use any
multiple of one byte between 1 and 128.
For more information about addressing
Word and Bit Memory, see page 4-6.
LD
K114
LD
K8
PLC Memory
RLL Programming
for Communications
User Application
Guidelines
4 words = 8 bytes
The LDA
Instruction
The Load Address (LDA) instruction
specifies the V-memory address of the
beginning memory register in the
initiating, or master, PLC. The data block
to be transmitted will begin at this address
and extend the number of bytes specified
in the preceding LD instruction. The
leading “O” indicates this is an octal
number. Simply substitute the letter “O” for
the “V” in the V-memory designation. For
example, V40600 becomes O40600.
Read instructions copy the data block from
the responding PLC memory into the
initiating PLC memory.
Write instructions copy the data block from
the initiating PLC memory into the
responding PLC memory.
LD
K114
LD
K8
LDA
O40600
Initiating PLC
V40577
V40600
V40601
V40602
V40603
V40604
Ethernet Communications Modules, 3rd Edition Rev. C, 06/11
4--5
RLL Programming for Communications
The Read (RX) instruction specifies the
memory location to be read from the
responding PLC.
A block of data is read that begins at the
specified memory location and extends the
number of bytes specified in the second LD
instruction.
In this example, the eight byte block of data
beginning at C100 and ending at C177 in
the responding, or slave, PLC is read
(copied) into the initiating PLC’s memory
beginning at V40600.
LD
K114
LD
K8
LDA
O40600
RX
C100
Re a d
Responding PLC
Initiating PLC
V40577
V40600
V40601
V40602
V40603
V40604
word
Write (WX)
Instruction
C177
bit
byte
C100
bit
4 words = 8 bytes
The Write (WX) instruction specifies the
memory location to be written to in the
responding PLC.
A block of data is written that begins at the
specified memory location and extends the
number of bytes specified in the second LD
instruction.
In the example, the 8-byte block of data
beginning at V40600 and ending at V40603
in the initiating, or master, PLC is written
(copied) into the responding PLC’s memory
beginning at C100 and ending at C177.
LD
K114
LD
K8
O40600
WX
C100
Responding PLC
V40577
V40600
V40601
V40602
V40603
V40604
byte
C177
bit
byte
word
V40603
V40604
V40605
V40606
V40607
V40610
C100
bit
4 words = 8 bytes
Ethernet Communications Modules, 3rd Edition Rev. C, 06/11
RLL Programming
for Communications
LDA
W r i t e
Initiating PLC
User Application
Guidelines
byte
V40603
V40604
V40605
V40606
V40607
V40610
4--6
RLL Programming for Communications
Getting Started
Addressing the Different Memory Types
Bit Memory
RLL Programming
for Communications
User Application
Guidelines
Word Memory
and Aliases
Some data types are inherently 16 bits long, for example timer and counter current
values. Other data types are 1 bit long, for example: discrete inputs and outputs.
Word-length and bit-length data are mapped into Word Memory, also known as
V-memory, which allows you to address any of the different memory types as 16-bit
words.
Bit memory can be addressed in Read and Write instructions by the name of the first
bit of any byte. If your second LD instruction contains the constant K8, eight bytes will
be transmitted. If you use C0 in your RX or WX instruction, you will transmit the eight
bytes from C0 through C77.
In the example below, V40600 is the V-memory designation for the sixteen bits from
C0 through C17. Aliases are a convenient substitute for V-memory designations,
and can be used interchangeably in Read and Write instructions. VC0 is the alias for
V40600. Either nomenclature addresses the same 16 bits.
The alias is simply the name of the first bit in a group of sixteen bits, with V added as a
prefix. For example, VC0 represents the 16 bits beginning with C0. Word Memory,
Bit Memory and Aliases all use the octal numbering system.
Word Memory Address V40600
= VC0 (Alias)
C17 C16 C15 C14 C13 C12 C11 C10 C7
C6
C5
C4
C3
C2
C1
C0
V40601 = VC20
C37 C36 C35 C34 C33 C32 C31 C30 C27 C26 C25 C24 C23 C22 C21 C20
V40602 = VC40
C57 C56 C55 C54 C53 C52 C51 C50 C47 C46 C45 C44 C43 C42 C41 C40
V40603 = VC60
C77 C76 C75 C74 C73 C72 C71 C70 C67 C66 C65 C64 C63 C62 C61 C60
The following Write routines are all equivalent. DirectSOFT gives you the flexibility
to identify the responding PLC’s memory area in three different ways, as shown
below.
LD
LD
K114
LD
LD
K8
LDA
LD
K114
O40600
WX
LD
K8
LDA
O40600
WX
C100
Ethernet Communications Modules, 3rd Edition Rev. C, 06/11
K114
K8
LDA
O40600
WX
VC100
V40605
RLL Programming for Communications
DirectSOFT
is Flexible
4--7
You can address the different data types by any available convention shown in the
tables that follow. The largest block of data that can be sent in a single Read or Write
operation is 128 bytes. The smallest block of data is one byte for Bit Memory types
and two bytes, or one word for Word Memory types. The octal numbering system is
used for all addresses in these tables.
DL05 CPU
DL05 CPU
Data Types
Bit Memory
Word Memory
Alias
Timer Current Values
None
V0 -- V177
TA0 -- TA177
Counter Current Values
None
V1000 -- V1177
CTA0 -- CTA177
None
V1200 -- V7377
User Data Words
None
X0 -- X377
V40400 -- V40417
VX0 -- VX360
Output Points
(See note 1)
Y0 -- Y377
V40500 -- V40517
VY0 -- VY360
Control Relays
C0 -- C777
V40600 -- V40677
VC0 -- VC760
Special Relays
SP0 -- SP777
V41200 -- V41237
VSP0 -- VSP760
Timer Status Bits
T0 -- T177
V41100 -- V41107
VT0 -- VT160
Counter Status Bits
CT0 -- CT177
V41140 -- V41147
VCT0 -- VCT160
Stages
S0 -- S377
V41000 -- V41017
VS0 -- VS360
1 -- The DL05 systems are limited to 8 discrete inputs and 6 discrete outputs with the present available hardware, but
256 point addresses exist.
DL06 CPU
DL06 CPU
Data Types
Bit Memory
Word Memory
User Application
Guidelines
Input Points
(See note 1)
Alias
None
V0 -- V377
TA0 -- TA377
Counter Current Values
None
V1000 -- V1177
CTA0 -- CTA177
User Data Words
None
V400 -- V677
V1200 -- V7377
V10000 -- V17777
None
Input Points
(See note 1)
X0 -- X777
V40400 -- V40437
VX0 -- VX760
Output Points
(See note 1)
Y0 -- Y777
V40500 -- V40537
VY0 -- VY760
Control Relays
C0 -- C1777
V40600 -- V40677
VC0 -- VC1760
Special Relays
SP0 -- SP777
V41200 -- V41237
VSP0 -- VSP760
Timer Status Bits
T0 -- T377
V41100 -- V41117
VT0 -- VT160
Counter Status Bits
CT0 -- CT177
V41140 -- V41147
VCT0 -- VCT160
Stages
S0 -- S1777
V41000 -- V41077
VS0 -- VS1760
Remote I/O
GX0 -- GX3777
GY0 -- GY3777
V40000 -- V40177
V40200 -- V40377
VGX0 -- VGX3760
VGY0 -- VGY3760
1 -- The DL06 systems are limited to 20 discrete inputs and 16 discrete outputs with the present available hardware,
but 512 point addresses exist.
Ethernet Communications Modules, 3rd Edition Rev. C, 06/11
RLL Programming
for Communications
Timer Current Values
RLL Programming
for Communications
User Application
Guidelines
Getting Started
4--8
RLL Programming for Communications
NOTE: The D2--230 CPU does not support the ECOM modules.
D2--240 CPU
D2--240 CPU
Data Types
Bit Memory
Word Memory
Alias
Timer Current Values
None
V0 -- V177
TA0 -- TA177
Counter Current Values
None
V1000 -- V1177
CTA0 -- CTA177
User Data Words
None
V2000 -- V3777
V4000 -- V4377
None
Input Points
X0 -- X477
V40400 -- V40423
VX0 -- VX460
Output Points
Y0 -- Y477
V40500 -- V40523
VY0 -- VY460
Control Relays
C0 -- C377
V40600 -- V40617
VC0 -- VC360
Special Relays
SP0 -- SP137
SP540 -- SP617
V41200 -- V41205
V41226 -- V41230
VSP0 -- VSP120
VSP540 -- VSP600
Timer Status Bits
T0 -- T177
V41100 -- V41107
VT0 -- VT160
Counter Status Bits
CT0 -- CT177
V41040 -- V41147
VCT0 -- VCT160
Stages
S0 -- S777
V41000 -- V41037
VS0 -- VS760
D2--250--1 CPU
D2--250--1 CPU
Data Types
Bit Memory
Word Memory
Alias
Timer Current Values
None
V0 -- V377
TA0 -- TA377
Counter Current Values
None
V1000 -- V1377
CTA0 -- CTA377
User Data Words
None
V1400 -- V7377
V10000 -- V17777
None
Input Points
X0 -- X777
V40400 -- V40437
VX0 -- VX760
Output Points
Y0 -- Y777
V40500 -- V40537
VY0 -- VY760
Control Relays
C0 -- C1777
V40600 -- V40677
VC0 -- VC1760
Special Relays
SP0 -- SP777
V41200 -- V41237
VSP0 -- VSP760
Timer Status Bits
T0 -- T377
V41100 -- V41117
VT0 -- VT360
Counter Status Bits
CT0 -- CT177
V41140 -- V41147
VCT0 -- VCT160
Stages
S0 -- S1777
V41000 -- V41077
VS0 -- VS1760
Ethernet Communications Modules, 3rd Edition Rev. C, 06/11
RLL Programming for Communications
D2--260 CPU
4--9
D2--260 CPU
Data Registers
Bit Memory
Word Memory
Alias
Timer Current Values
None
V0 -- V377
TA0 -- TA377
Counter Current Values
None
V1000 -- V1377
CTA0 -- CTA377
User Data Words
None
V400 -- V777
V1400 -- V7377
V10000 -- V37777
None
Input Points
X0 -- X1777
V40400 -- V40477
VX0 -- VX1760
Output Points
Y0 -- Y1777
V40500 -- V40577
VY0 -- VY1760
Control Relays
C0 -- C3777
V40600 -- V40777
VC0 -- VC3760
Special Relays
SP0 -- SP137
SP320 -- SP717
V41200 -- V41205
V41215 -- V41234
VSP0 -- VSP120
VSP320 -- VSP700
Timer Status Bits
T0 -- T377
V41100 -- V41117
VT0 -- VT360
Counter Status Bits
CT0 -- CT377
V41140 -- V41157
VCT0 -- VCT360
Stages
S0 -- S1777
V41000 -- V41077
VS0 -- VS1760
Remote I/O
GX0 -- GX3777
GY0 -- GY3777
V40000 -- V40177
V40200 -- V40377
VGX0 -- VGX3760
VGY0 -- VGY3760
D4--430 CPU
Data Registers
Bit Memory
Word Memory
Alias
Timer Current Values
None
V0 -- V177
TA0 -- TA177
Counter Current Values
None
V1000 -- V1177
CTA0 -- CTA177
User Data Words
None
V1400 -- V7377
None
X0 -- X477
V40400 -- V40423
VX0 -- VX460
Output Points
Y0 -- Y477
V40500 -- V40523
VY0 -- VY460
Control Relays
C0 -- C737
V40600 -- V40635
VC0 -- VC720
Special Relays
SP0 -- 137
SP320 -- SP617
V41200 -- V41205
V41215 -- V41230
VSP0 -- VSP120
VSP320 -- VSP600
Timer Status Bits
T0 -- T177
V41100 -- V41107
VT0 -- VT160
Counter Status Bits
CT0 -- CT177
V41140 -- V41147
VCT0 -- VCT160
Stages
S0 -- S577
V41000 -- V41027
VS0 -- VS560
Remote I/O
GX0 -- GX777
V40000 -- V40037
VGX0 -- VGX760
Ethernet Communications Modules, 3rd Edition Rev. C, 06/11
RLL Programming
for Communications
Input Points
User Application
Guidelines
D4--430 CPU
Getting Started
4--10
RLL Programming for Communications
D4--440 CPU
D4--440 CPU
Data Registers
Bit Memory
User Application
Guidelines
Alias
Timer Current Values
None
V0 -- V377
TA0 -- TA377
Counter Current Values
None
V1000 -- V1177
CTA0 -- CTA177
User Data Words
None
V1400 -- V7377
V10000 -- V17777
None
Input Points
X0 -- X477
V40400 -- V40423
VX0 -- VX460
Output Points
Y0 -- Y477
V40500 -- V40523
VY0 -- VY460
Control Relays
C0 -- C1777
V40600 -- V40677
VC0 -- VC1760
Special Relays
SP0 -- 137
SP320 -- SP717
V41200 -- V41205
V41215 -- V41234
VSP0 -- VSP120
VSP320 -- VSP700
Timer Status Bits
T0 -- T377
V41100 -- V41117
VT0 -- VT360
Counter Status Bits
CT0 -- CT177
V41140 -- V41147
VCT0 -- VCT160
Stages
S0 -- S1777
V41000 -- V41077
VS0 -- VS1760
Remote I/O
GX0 -- GX1777
V40000 -- V40077
VGX0 -- VGX1760
D4--450 CPU
RLL Programming
for Communications
Word Memory
D4--450 CPU
Data Registers
Bit Memory
Word Memory
Alias
Timer Current Values
None
V0 -- V377
TA0 -- TA377
Counter Current Values
None
V1000 -- V1377
CTA0 -- CTA377
User Data Words
None
V1400 -- V7377
V10000 -- V37777
None
Input Points
X0 -- X1777
V40400 -- V40477
VX0 -- VX1760
Output Points
Y0 -- Y1777
V40500 -- V40577
VY0 -- VY1760
Control Relays
C0 -- C3777
V40600 -- V40777
VC0 -- VC3760
Special Relays
SP0 -- SP137
SP320 -- SP717
V41200 -- V41205
V41215 -- V41234
VSP0 -- VSP120
VSP320 -- VSP700
Timer Status Bits
T0 -- T377
V41100 -- V41117
VT0 -- VT360
Counter Status Bits
CT0 -- CT377
V41140 -- V41157
VCT0 -- VCT360
Stages
S0 -- S1777
V41000 -- V41077
VS0 -- VS1760
Remote I/O
GX0 -- GX3777
GY0 -- GY3777
V40000 -- V40177
V40200 -- V40377
VGX0 -- VGX3760
VGY0 -- VGY3760
Ethernet Communications Modules, 3rd Edition Rev. C, 06/11
RLL Programming for Communications
4--11
Special Relays for Communications
The DirectLOGIC PLCs provide internal contacts (bits) for monitoring the status of
communications. The internal contacts are called Special Relays (there are other
Special Relays used for other purposes). There are two Special Relays for each slot
in the base that will accept the ECOM module. The two relays perform the following
functions:
S Communication Busy -- This bit is on when the communication module
is busy transmitting or receiving. You must use this bit, or relay contact,
to prevent overwriting your Read or Write (RX/WX) instructions.
S Communication Error -- This bit is on when an error occurred in the
last RX or WX communication. This error automatically clears (the bit
resets to zero) when another RX or WX instruction executes.
For example, Special Relays SP124 and
SP125 correspond to an ECOM module
in slot 3 of the PLC base.
The Special Relay SP125 is used in the
example to energize the output Y50,
indicating a communication error has
occurred. This Special Relay must
appear earlier in the program than your
RX or WX instruction because it is turned
off (reset to zero) when a subsequent
Read or Write instruction is executed.
The Special Relay SP124 indicates the
ECOM is busy. When SP124 is on, the
normally closed contact opens to prevent
executing another RX or WX instruction
until the last one is completed. The
appropriate busy bit must be used as a
NC contact on every RX/WX instruction
rung in the program.
SP125
Y50
SET
LD
K204
LD
LDA
Option Slot
Communication busy
SP120
Communication error
SP121
DL06 Special Purpose Communication Relays
CPU-Base
Slot 1
Slot 2
Slot 3
Slot 4
Communication busy
SP120
SP122
SP124
SP126
Communication error
SP121
SP123
SP125
SP127
Ethernet Communications Modules, 3rd Edition Rev. C, 06/11
RLL Programming
for Communications
RX
DL05 Special Purpose Communication Relays
CPU-Base
User Application
Guidelines
SP124
4--12
RLL Programming for Communications
Getting Started
DL240, DL250--1 and DL260 Special Purpose Communication Relays
CPU-Base
Slot 1
Slot 2
Slot 3
Slot 4
Slot 5
Slot 6
Slot 7
Communication busy
SP122
SP124
SP126
SP130
SP132
SP134
SP136
Communication error
SP123
SP125
SP127
SP131
SP133
SP135
SP137
D2--240
D2--250--1
D2--260
0
1
2
3
CPU Slot
4
5
6
7
No ECOM permitted in slot 0!
D4--430 and D4--440 Special Purpose Communication Relays
Slot 0
Slot 1
Slot 2
Slot 3
Slot 4
Slot 5
Slot 6
Slot 7
Communication busy
SP120
SP122
SP124
SP126
SP130
SP132
SP134
SP136
Communication error
SP121
SP123
SP125
SP127
SP131
SP133
SP135
SP137
2
4
User Application
Guidelines
CPU-Base
DL405
Slot
0
1
3
5
6
7
RLL Programming
for Communications
D4--450 Special Purpose Communication Relays
CPU-Base
Slot 0
Slot 1
Slot 2
Slot 3
Slot 4
Slot 5
Slot 6
Slot 7
Communication busy
SP120
SP122
SP124
SP126
SP130
SP132
SP134
SP136
Communication error
SP121
SP123
SP125
SP127
SP131
SP133
SP135
SP137
Expansion Base 1
Slot 0
Slot 1
Slot 2
Slot 3
Slot 4
Slot 5
Slot 6
Slot 7
Communication busy
SP140
SP142
SP144
SP146
SP150
SP152
SP154
SP156
Communication error
SP141
SP143
SP145
SP147
SP151
SP153
SP155
SP157
Expansion Base 2
Slot 0
Slot 1
Slot 2
Slot 3
Slot 4
Slot 5
Slot 6
Slot 7
Communication busy
SP160
SP162
SP164
SP166
SP170
SP172
SP174
SP176
Communication error
SP161
SP163
SP165
SP167
SP171
SP173
SP175
SP177
Expansion Base 3
Slot 0
Slot 1
Slot 2
Slot 3
Slot 4
Slot 5
Slot 6
Slot 7
Communication busy
SP200
SP202
SP204
SP206
SP210
SP212
SP214
SP216
Communication error
SP201
SP203
SP205
SP207
SP211
SP213
SP215
SP217
Ethernet Communications Modules, 3rd Edition Rev. C, 06/11
4--13
RLL Programming for Communications
Program with One Read Instruction
The Ladder View screen below is the program development screen in DirectSOFT
Programming Software. This four rung program is explained in detail on page 4-14.
This is a complete program although its function is very limited. There is also a two
rung program that runs in the responding PLC, and it is also explained on page 4-14.
Program for the
Initiating PLC
User Application
Guidelines
Program for the
Responding PLC
Re a d
Module ID 3
CPU
E I
C N
O P
M U
T
Initiating PLC
(master)
Module ID 14
O
U
T
P
U
T
Y0
Off
X0
Hub
On
CPU
I
N
P
U
T
E
C
O
M
O
U
T
P
U
T
Responding PLC
(slave)
For the purpose of these example programs, both the initiating PLC and the
responding PLC must be in RUN Mode.
Ethernet Communications Modules, 3rd Edition Rev. C, 06/11
RLL Programming
for Communications
When the toggle switch input to the responding PLC is turned on (transitions from 0
to 1), the C0 bit in the initiating PLC transitions from 0 to 1. The program in the
initiating PLC causes Y0 to turn on in response to the C0 bit.
Getting Started
4--14
RLL Programming for Communications
Rung 1
In our example, the normally open contact
labeled C0 is an internal control relay.
When C0 is on, discrete output Y0 is
energized.
Rung 2
The second rung uses a Special Relay to
identify a communication error. In the
example, SP123 is on if a communication
error is present for slot one. Use different
Special Relays if your ECOM module is in a
different slot (see page 4-11 and 4-12). We
use SP123 to turn on an indicator light
connected to a discrete output.
User Application
Guidelines
Rung 3
The Special Relay labeled SP122 is on
when slot 1 is busy transmitting or
receiving. The Read instruction may take
longer than one PLC scan to complete. Use
this Special Relay to prevent overwriting the
previous Read instruction with each PLC
scan.
Upper Byte
Initiating PLC
(Master)
C0
SP123
SP122
RLL Programming
for Communications
LD
K0114
LD
K2
Responding PLC
(Slave)
Base Number
ECOM Slot Number
Y1
SET
Lower Byte
K 0 1 1 4
Y0
OUT
LDA
O40600
ECOM Module ID
BCD
RX
VC100
Number of bytes to be transferred.
Max = 128 bytes.
Beginning address in the initiating PLC,
expressed as an octal number.
Beginning address in the responding PLC.
Rung 4
Program for the
Responding PLC
All DirectLOGIC PLCs use an END
statement to identify the final rung of the
main body of the program.
This two-rung program resides in the
responding PLC’s CPU. Its function is
simply to use the X0 contact to turn on the
internal control relay, C100.
Ethernet Communications Modules, 3rd Edition Rev. C, 06/11
END
X0
C100
OUT
END
4--15
RLL Programming for Communications
Example Program with One Write Instruction
The Ladder View screen below is the program development screen in DirectSOFT
Programming Software. This four-rung program is explained in detail on page 4-16.
This is a complete program although its function is very limited. There is also a
two-rung program that runs in the responding PLC. It is also explained on page 4-16.
Program for the
Initiating PLC
User Application
Guidelines
Program for the
Responding PLC
Module ID 3
CPU
E I
C N
O P
M U
T
Initiating PLC
(master)
Module ID 14
O
U
T
P
U
T
Off
X0
On
Y0
Hub
CPU
I
N
P
U
T
E
C
O
M
O
U
T
P
U
T
Responding PLC
(slave)
For the purpose of these example programs, both the initiating PLC and the
responding PLC must be in RUN Mode.
Ethernet Communications Modules, 3rd Edition Rev. C, 06/11
RLL Programming
for Communications
When the toggle switch input to the initiating PLC is turned on (transitions
from 0 to 1), the C100 bit in the responding PLC also transitions from 0 to 1. The
program in the responding PLC causes Y0 to turn on in response to the C100 bit.
Getting Started
4--16
RLL Programming for Communications
Rung 1
In our example, the normally open contact
labeled X0 is a toggle switch input to a
discrete input module. When X0 is on,
Control Relay C0 is energized.
Rung 2
The second rung uses a Special Relay to
identify a communication error. In the
example, SP123 is on if there is a
communication error present in slot one.
Use different Special Relays if your ECOM
module is in a different slot (see page 4-11
and 4-12). We use SP123 to turn on an
indicator light connected to a discrete
output.
User Application
Guidelines
Rung 3
The Special Relay labeled SP122 is on
when slot 1 is busy transmitting or
receiving. The Write instruction may take
longer than one PLC scan to complete. Use
this Special Relay to prevent overwriting the
previous Write instruction with each PLC
scan.
Upper Byte
Initiating PLC
(Master)
X0
SP123
SP122
RLL Programming
for Communications
LD
K0114
LD
K2
Responding PLC
(Slave)
Base Number
ECOM Slot Number
Y1
SET
Lower Byte
K 0 1 1 4
C0
OUT
LDA
O40600
ECOM Module ID
BCD
WX
VC100
Number of bytes to be transferred.
Max = 128 bytes.
Beginning address in the initiating PLC,
expressed as an octal number.
Beginning address in the responding PLC.
Rung 4
Program for the
Responding PLC
All DirectLOGIC PLCs use an END
statement to identify the final rung of the
main body of the program.
This two-rung program resides in the
responding PLC’s CPU. Its function is
simply to take the C100 contact and
convert it to a real output, Y0.
Ethernet Communications Modules, 3rd Edition Rev. C, 06/11
END
C100
Y0
OUT
END
4--17
RLL Programming for Communications
Integrating Multiple Read and Write Instructions
Multiple Read and Write instructions require interlocks for sequencing because only
one RX/WX instruction can be processed per CPU scan. Using interlocks, one
RX/WX instruction is processed in each scan until all RX/WX instructions have been
executed. After the last instruction, the sequence then begins again at the first
RX/WX instruction.
Without interlocks, the RX/WX instructions would be executed in an unpredictable
order, and some might be executed many times before others are executed once.
The interlocks serve to open (disconnect) the ladder circuits for all Read and Write
instructions except the one that should be processed on the current CPU scan.
We show two methods of creating the interlocks necessary for sequencing multiple
Read and Write instructions:
S Sequenced Internal Control Relays
S Shift Register
We will step you through the development of the interlocks using both methods. The
two examples shown perform the same function. Only the interlocks are different.
The following program segment sequences through three RX/WX instructions (two
Write instructions and one Read instruction). You can develop your own program
incorporating either of the two interlocking control strategies and expanding the
number of interlocks to accommodate the number of RX/WX instructions in your
program.
It is easy to see the function of the interlocking relays if we construct a truth table first.
Across the top of the truth table we
show internal control relays that we
are considering using for our
sequencing strategy. We have used
C50 through C52 for our chart, but
any contacts that are not used for
other purposes in your program will
work just as well.
Down the left side of the chart, we list
the number of RX/WX instructions we
may want to use in our RLL program.
Truth Table
C52
C51
C50
First RX/WX
0
0
0
Second RX/WX
0
0
1
Third RX/WX
0
1
0
Fourth RX/WX
0
1
1
Fifth RX/WX
1
0
0
Sixth RX/WX
1
0
1
Seventh RX/WX
1
1
0
Eighth RX/WX
1
1
1
The three contacts in this truth table
will accommodate as many as eight
Read or Write instructions. Our program only has three RX/WX instructions so we
only need to use two contacts (see why on page 4-18). We will use C50 and C51.
One additional contact (C53) would give us 32 combinations since the number of
combinations expands as the power of 2.
Ethernet Communications Modules, 3rd Edition Rev. C, 06/11
RLL Programming
for Communications
Interlocking
Relays
User Application
Guidelines
NOTE: To fully understand the material in this section, you will first need to
understand the Example Programs on pages 4-13 and 4-15, as well as the material
in the Network Instructions section, beginning on page 4-3.
4--18
RLL Programming for Communications
Getting Started
Our three RX/WX instructions can be
sequenced by the two contacts C50
and C51. Two contacts provide four
different binary states:
S
S
S
S
both off
C50 on and C51 off
C50 off and C51 on
both on
We only need to use three of the four
binary states (circled) since we only
have three RX/WX instructions to
sequence.
RLL Programming
for Communications
User Application
Guidelines
First RX/WX
Instruction
C50 and C51 are interlocking
contacts. They are normally closed in
this rung to permit power flow to the
first WX instruction. Both bits are off,
corresponding to the first row of the
truth table.
After the WX instruction is executed
C50 is SET (turned on) which opens
the contact in this rung and closes the
C50 contact in the next rung.
C51 is RESET (turned off) which
leaves the C51 contact closed for the
next rung.
Ethernet Communications Modules, 3rd Edition Rev. C, 06/11
Truth Table
C52
C51
C50
First RX/WX
0
0
0
Second RX/WX
0
0
1
Third RX/WX
0
1
0
Fourth RX/WX
0
1
1
Fifth RX/WX
1
0
0
Sixth RX/WX
1
0
1
Seventh RX/WX
1
1
0
Eighth RX/WX
1
1
1
SP122
C51
C50
LD
K114
LD
K2
LDA
O40600
WX
VC100
C50
SET
C51
RST
RLL Programming for Communications
Second RX/WX
Instruction
C50 is normally open and C51 is
normally closed. For this rung to be
executed, the C50 bit must be on and
the C51 bit must be off, corresponding
to the second row of the truth table.
C50 was turned on in the previous
rung. C51 was turned off in the
previous rung.
SP122
C51
C50
LDA
O40601
WX
VC0
C50
RST
C51 is SET (turned on), which closes
the normally open C51 contact in the
next rung.
C51 is also RESET, which allows the
C51 contact to close in preparation for
repeating the first communication rung
on the next CPU scan (page 4-18).
Returning to the
First RX/WX
Instruction
SP122
C51
C50
LD
K114
LD
K2
LDA
O40602
RX
VC20
C50
RST
C51
RST
At the end of the third RX/WX instruction, we cycle back to the top row of the truth
table on page 4-18. Both C50 and C51 are off, and the next CPU scan executes the
first RX/WX instruction.
Ethernet Communications Modules, 3rd Edition Rev. C, 06/11
RLL Programming
for Communications
After the RX instruction is executed,
C50 is RESET which opens the C50
contact in this rung and allows it to
close in preparation for repeating the
first communication rung on the next
CPU scan (page 4-18).
C51
SET
User Application
Guidelines
In this last rung, C50 is normally
closed and C51 is normally open. For
this rung to be executed, the C50 bit
must be off and the C51 bit must be on,
corresponding to the third row of the
truth table. C51 was turned on in the
previous rung.
LD
K109
LD
K2
After the WX instruction is executed
C50 is RESET (turned off) which
opens the C50 contact in this rung and
closes it in the next rung.
Third RX/WX
Instruction
4--19
4--20
RLL Programming for Communications
Getting Started
Shift Register
The Shift Register can be used for creating interlocks, as an alternative to using
control relays. For a complete explanation of the function of the Shift Register, see
the User Manual for your PLC. If you have more than a few RX/WX instructions,
using control relays can become cumbersome. The Shift Register allows a single
contact to be used in each communication rung as an interlock.
User Application
Guidelines
The data input to the Shift Register
(SR) is Special Relay SP1. SP1 is the
always-on bit. Combined with a
normally closed contact it sends zeros
to the Shift Register data input.
The clock input to the Shift Register is
SP122, the communication busy bit.
Each time one of the RX/WX
instructions executes, the Shift
Register moves the set bit over one
place.
C63 is used in this example to reset the
Shift Register to all zeros.
SP1
SR
C60
C77
SP122
C63
C77 C76 C75 C74 C73 C72 C71 C70 C67 C66 C65 C64 C63 C62 C61 C60
Shift Register after first scan.
C77 C76 C75 C74 C73 C72 C71 C70 C67 C66 C65 C64 C63 C62 C61 C60
Shift Register after second scan.
RLL Programming
for Communications
C77 C76 C75 C74 C73 C72 C71 C70 C67 C66 C65 C64 C63 C62 C61 C60
Shift Register after first RX/WX.
C77 C76 C75 C74 C73 C72 C71 C70 C67 C66 C65 C64 C63 C62 C61 C60
Shift Register after second RX/WX.
C77 C76 C75 C74 C73 C72 C71 C70 C67 C66 C65 C64 C63 C62 C61 C60
Shift Register after third RX/WX.
C77 C76 C75 C74 C73 C72 C71 C70 C67 C66 C65 C64 C63 C62 C61 C60
Shift Register after third RX/WX plus one scan.
Store If Equal
The Store If Equal instruction detects
when the Shift Register is reset to
zeros. When that condition is true the
C60 bit is SET by this rung. The C60 bit
becomes the high bit shifted by the
Shift Register until each RX/WX
instruction is executed in turn.
Ethernet Communications Modules, 3rd Edition Rev. C, 06/11
V40603
K0
=
C60
SET
RLL Programming for Communications
4--21
First RX/WX
Instruction
C60 is the interlocking contact. It is
turned on by the Store If Equal rung
preceding this one.
SP122
C60
LD
K114
LD
K2
LDA
O40600
WX
VC100
Second RX/WX
Instruction
C61 is the interlocking contact. It is
turned on by the sequencing steps of
the Shift Register in a preceding rung.
SP122
C61
LD
K109
LDA
O40601
User Application
Guidelines
LD
K2
WX
VC0
C62 is the interlocking contact. It is
turned on by the sequencing steps of
the Shift Register in a preceding rung.
SP122
C62
LD
K114
LD
K2
LDA
O40602
RX
VC20
After this rung is executed, the Shift Register shifts the high bit from C62 to C63 on
the next CPU scan. C63 resets the Shift Register to zeros, the Store If Equal sets the
C60 bit, and the CPU executes the first RX/WX instruction.
Ethernet Communications Modules, 3rd Edition Rev. C, 06/11
RLL Programming
for Communications
Third RX/WX
Instruction
MODBUSr TCP for
H0/H2/H4--ECOM100
In This Chapter. . . .
— MODBUS TCP
— Supported MODBUS Function Codes
— Network Server Operation
— Network Client Operation
— H0/H2/H4--ECOM100 System Memory
15
5--2
MODBUS TCP for H0/H2/H4--ECOM100
MODBUS TCP
Client / Server
Model
MODBUS TCP is essentially the serial MODBUS RTU protocol encapsulated in a
TCP/IP wrapper. MODBUS RTU is used for serial communications between a
master and slave(s) devices. MODBUS TCP is used for TCP/IP communications
between client and server devices on an Ethernet network. The TCP version of
MODBUS follows the OSI Network Reference Model.
The MODBUS messaging service provides a Client/Server communication
between devices connected on an Ethernet TCP/IP network. This client / server
model is based on four type of messages:
• MODBUS Request -- the message sent on the network by the Client to
initiate a transaction
• MODBUS Confirmation -- the Response Message received on the Client
side
• MODBUS Indication -- the Request message received on the Server
side
• MODBUS Response -- the Response message sent by the Server
Client / Server Model
Request
Indication
Client
Server
Confirmation
Protocol
Description
A typical MODBUS TCP frame consists of the following fields:
TCP HEADER
MODBUS TCP
H0/H2--ECOM100
Response
The H0/H2--ECOM100 can
act as a Client or Server
MBAP HEADER
FUNCTION
DATA
The MBAP header (MODBUS Application Protocol header) is seven bytes long. It
consists of the following fields.
• Transaction Identifier -- It is used for transaction pairing, the MODBUS
server copies in the response the transaction identifier of the request. (2
bytes)
• Protocol Identifier -- It is used for intra--system multiplexing. The
MODBUS protocol is identified by the value 0. (2 bytes)
• Length -- The length field is a byte count of the following fields, including
the Unit Identifier and data fields. (2 bytes)
• Unit Identifier -- This field is used for intra--system routing purpose. It is
typically used to communicate to a MODBUS or a MODBUS+ serial line
slave through a gateway between an Ethernet TCP/IP network and a
MODBUS serial line. This field is set by the MODBUS Client in the
request and must be returned with the same value in the response by
the server. (1 byte)
This header provides some differences compared to the MODBUS RTU application
data unit used on serial line:
Ethernet Communications Modules, 3rd Edition Rev C, 06/11
MODBUS TCP/IP for H0/H2/H4--ECOM100
•
•
•
5--3
The MODBUS “slave address” field usually used on MODBUS Serial
Line is replaced by a single byte “Unit Identifier” within the MBAP
Header. The “Unit Identifier” is used to communicate via devices such
as bridges, routers and gateways that use a single IP address to
support multiple independent MODBUS end units.
All MODBUS requests and responses are designed in such a way that
the recipient can verify that a message is finished. For function codes
where the MODBUS PDU has a fixed length, the function code alone is
sufficient. For function codes carrying a variable amount of data in the
request or response, the data field includes a byte count.
Protocol Identifier -- It is used for intra--system multiplexing. The
MODBUS protocol is identified by the value 0. (2 bytes)
The function code field of a message contains 8 bits. Valid function codes are in the
range of 1 -- 255 decimal. The function code instructs the slave what kind of action to
take. Some examples are to read the status of a group of discrete inputs; to read the
data in a group of registers; to write to an output coil or a group of registers; or to read
the diagnostic status of a slave.
When a slave responds to the master, it uses the function code field to indicate either
a normal response or that some type of error has occurred. For a normal response,
the slave echoes the original function code. In an error condition, the slave echoes
the original function code with its MSB set to a logic 1.
Installation and
The data field is constructed using sets of two hexadecimal digits in the range of 00
to FF. According to the network’s serial transmission mode, these digits can be made
of a pair of ASCII characters or from one RTU character.
The data field also contains additional information that the slave uses to execute the
action defined by the function code. This can include internal addresses, quantity of
items to be handled, etc.
The data field of a response from a slave to a master contains the data requested if
no error occurs. If an error occurs, the field contains an exception code that the
master uses to determine the next action to be taken. The data field can be
nonexistent in certain types of messages.
MODBUS TCP
H0/H2--ECOM100
Ethernet Communications Modules, 3rd Edition Rev C, 06/11
5--4
MODBUS TCP for H0/H2/H4--ECOM100
NOTE: ModScan32 is a Windows based application program that can be used as a
MODBUS master to access and change data points in a connected device
(H0/H2/H4--ECOM100) The utility is ideally suited for quick and easy testing of
MODBUS TCP network slave devices. Visit www.win--tech.com to download a free
ModScan32 trial demo and for more information on ModScan32.
Supported MODBUS Function Codes
The following MODBUS function codes are supported by the H0/H2/H4--ECOM100.
Not all function codes are supported when the ECOM100 serves as a network client.
The “Network Client Operation” section later in this chapter lists the function codes
that are supported in client mode.
MODBUS
Function Code
Function
Server
Mode
Client
Mode
Read Output Table
yes
yes
02
Read Input Table
yes
yes
03
Read Holding Registers (when addressing
mode is 584/984, this function is used to access analog output registers)
yes
yes
04
Read Input Registers (when addressing mode
is 584/984, this function is used to access
analog input registers)
yes
yes
05
Force Single Output
yes
no
06
Preset Single Registers
yes
no
08
Loop back / Maintenance
yes
no
15
Force Multiple Outputs
yes
yes
16
Preset Multiple Registers
yes
yes
MODBUS TCP
H0/H2--ECOM100
01
Ethernet Communications Modules, 3rd Edition Rev C, 06/11
MODBUS TCP/IP for H0/H2/H4--ECOM100
5--5
Network Server (slave) Operation
This section describes how other MODBUS TCP clients on a network can communicate
with an H0/H2/H4--ECOM100 that you have configured for MODBUS TCP protocol. A
network client must send a MODBUS function code and MODBUS address to specify a
PLC memory location the DL05/06/205/405 CPU. No CPU ladder logic is required to
support MODBUS TCP server operation.
MODBUS Function The H0/H2/H4--ECOM100 supports the following MODBUS function codes when
Codes Supported acting as a MODBUS TCP server.
MODBUS
Function Code
Determining the
MODBUS Address
Function
DL05/06/205 /405
Data Types Available
01
Read Output Table
Y, C, T, CT
02
Read Input Table
X, SP
03
Read Holding Registers (when addressing
mode is 584/984, this function is used to access analog output registers)
V
04
Read Input Registers (when addressing mode
is 584/984, this function is used to access
analog input registers)
V
05
Force Single Output
Y, C, T, CT
06
Preset Single Registers
V
08
Loop back / Maintenance
15
Force Multiple Outputs
Y, C, T, CT
16
Preset Multiple Registers
V
Installation and
There are typically two ways that most MODBUS addressing conventions allow you
to specify a PLC memory location. These are:
• By specifying the MODBUS data type and address
• By specifying a MODBUS address only.
MODBUS TCP
H0/H2--ECOM100
Ethernet Communications Modules, 3rd Edition Rev C, 06/11
5--6
MODBUS TCP for H0/H2/H4--ECOM100
If Your Host Software Many MODBUS TCP clients allow you to specify the MODBUS data type and the
or Client Requires
MODBUS address that corresponds to the PLC memory location. This is the easiest
the Data Type and
method, but not all packages allow you to do it this way.
Address
The actual equation used to calculate the address depends on the type of PLC data
you are using. The PLC memory types are split into two categories for this purpose.
• Discrete -- X, SP, Y, C, S, T(contacts), CT (contacts)
• Word -- V--memory, Timer current value, Counter current value
In either case, you basically convert the PLC octal address to decimal and add the
appropriate MODBUS starting address (as required). The following tables show the exact
range used for each group of data.
NOTE: For an automated MODBUS/Koyo address conversion utility, download the file
modbus_conversion.xls from the www.automationdirect.com technical support
website.
DL05 Memory Type
QTY
(Dec.)
PLC Range
(Octal)
For Discrete Data Types .... Convert PLC Addr. to Dec.
MODBUS
Address Range
+
Start of Range
MODBUS
Data Type
+ Data Type
Inputs (X)
256
X0
--
X377
2048
--
2303
Input
Special Relays (SP)
512
SP0
--
SP777
3072
--
3583
Input
Outputs (Y)
256
Y0
--
Y377
2048
--
2303
Coil
Control Relays (C)
512
C0
--
C777
3072
--
3583
Coil
Timer Contacts (T)
128
T0
--
T177
6144
--
6271
Coil
Counter Contacts (CT)
128
CT0
--
CT177
6400
--
6527
Coil
Stage Status Bits (S)
256
S0
--
S377
5120
--
5375
Coil
For Word Data Types ....
128
V0
--
V177
Counter Current Values (V) 128
V1000
--
V--Memory, user data (V)
V1400
--
3072
+
Data Type
0
--
127
Input Register
V1177
512
--
639
Input Register
V7377
768
--
3839
Holding Register
MODBUS TCP
H0/H2--ECOM100
Timer Current Values (V)
Convert PLC Addr. to Dec.
Ethernet Communications Modules, 3rd Edition Rev C, 06/11
MODBUS TCP/IP for H0/H2/H4--ECOM100
DL06 Memory Type
QTY
(Dec.)
PLC Range
(Octal)
For Discrete Data Types .... Convert PLC Addr. to Dec.
MODBUS
Address Range
+
Start of Range
MODBUS
Data Type
+ Data Type
Inputs (X)
512
X0
--
X777
2048
--
2559
Input
Special Relays (SP)
512
SP0
--
SP777
3072
--
3583
Input
Outputs (Y)
512
Y0
--
Y777
2048
--
2559
Coil
Control Relays (C)
1024
C0
--
C1777
3072
--
4095
Coil
Timer Contacts (T)
256
T0
--
T377
6144
--
6399
Coil
Counter Contacts (CT)
128
CT0
--
CT177
6400
--
6527
Coil
Stage Status Bits (S)
1024
S0
--
S1777
5120
--
6143
Coil
Global Inputs (GX)
2048
GX0
--
GX3777
0
--
2047
Input
Global Outputs (GY)
2048
GY0
--
GY3777
0
--
2047
Coil
For Word Data Types ....
Timer Current Values (V)
Convert PLC Addr. to Dec.
+
256
V0
--
V377
Counter Current Values (V) 128
V1000
--
V1177
V--Memory, user data (V)
V400 -- V677
V1400 -- V7377
V10000 -- V17777
DL240 Memory Type
256
3072
4096
QTY
(Dec.)
PLC Range
(Octal)
For Discrete Data Types .... Convert PLC Addr. to Dec.
Data Type
0
--
255
Input Register
512
--
639
Input Register
256
768
4096
----
511
3839
8191
Holding Register
MODBUS
Address Range
+
Start of Range
MODBUS
Data Type
+ Data Type
320
X0
--
X477
2048
--
2367
Input
Special Relays (SP)
144
SP0
SP540
---
SP137
SP617
3072
3280
---
3167
3471
Input
Outputs (Y)
320
Y0
--
Y477
2048
--
2367
Coil
Control Relays (C)
256
C0
--
C377
3072
--
3551
Coil
Timer Contacts (T)
128
T0
--
T177
6144
--
6271
Coil
Counter Contacts (CT)
128
CT0
--
CT177
6400
--
6527
Coil
Stage Status Bits (S)
512
S0
--
S777
5120
--
5631
Coil
Timer Current Values (V)
Convert PLC Addr. to Dec.
V0
--
V177
Counter Current Values (V) 128
V1000
--
V--Memory, user data (V)
1024
V2000
V--Memory, user data (V)
non--volatile
256
V--Memory, system (V)
106
Data Type
0
--
127
Input Register
V1177
512
--
639
Input Register
--
V3777
1024
--
2047
Holding Register
V4000
--
V4377
2048
--
2303
Holding Register
V7620
V7746
---
V7737
V7777
3984
4070
---
4063
4095
Holding Register
Ethernet Communications Modules, 3rd Edition Rev C, 06/11
MODBUS TCP
H0/H2--ECOM100
128
+
Installation and
Inputs (X)
For Word Data Types ....
5--7
5--8
MODBUS TCP for H0/H2/H4--ECOM100
DL250--1 Memory Type
QTY
(Dec.)
PLC Range
(Octal)
For Discrete Data Types .... Convert PLC Addr. to Dec.
+
Start of Range
MODBUS
Data Type
+ Data Type
Inputs (X)
512
X0
--
X777
2048
--
2560
Input
Special Relays (SP)
512
SP0
SP320
---
SP137
SP777
3072
3280
---
3167
3583
Input
Outputs (Y)
512
Y0
--
Y777
2048
--
2560
Coil
Control Relays (C)
1024
C0
--
C1777
3072
--
4095
Coil
Timer Contacts (T)
256
T0
--
T377
6144
--
6399
Coil
Counter Contacts (CT)
128
CT0
--
CT177
6400
--
6527
Coil
Stage Status Bits (S)
1024
S0
--
S1777
5120
--
6143
Coil
For Word Data Types ....
Timer Current Values (V)
Convert PLC Addr. to Dec.
256
V0
--
V377
Counter Current Values (V) 128
V1000
--
V1177
V--Memory, user data (V)
3072
4096
V1400 -V10000 --
V--Memory, system (V)
256
V7400
DL260 Memory Type
QTY
(Dec.)
--
Inputs (X)
1024
Special Relays (SP)
512
Outputs (Y)
+
Data Type
0
--
255
Input Register
512
--
639
Input Register
V7377
V17777
768
4096
---
3839
8191
Holding Register
V7777
3840
--
4095
Holding Register
MODBUS
Address Range
MODBUS
Data Type
PLC Range
(Octal)
For Discrete Data Types .... Convert PLC Addr. to Dec.
+
Start of Range
+ Data Type
X0
--
X1777
2048
--
3071
Input
SP0
SP320
---
SP137
SP717
3072
3280
---
3167
3535
Input
1024
Y0
--
Y1777
2048
--
3071
Coil
Control Relays (C)
2048
C0
--
C3777
3072
--
5119
Coil
Timer Contacts (T)
256
T0
--
T377
6144
--
6399
Coil
Counter Contacts (CT)
256
CT0
--
CT377
6400
--
6655
Coil
Stage Status Bits (S)
1024
S0
--
S1777
5120
--
6143
Coil
Global Inputs (GX)
2048
GX0
--
GX3777
0
--
2047
Input
Global Outputs (GY)
2048
GY0
--
GY3777
0
--
2047
Coil
For Word Data Types ....
Timer Current Values (V)
MODBUS TCP
H0/H2--ECOM100
MODBUS
Address Range
Convert PLC Addr. to Dec.
256
V0
--
V377
Counter Current Values (V) 256
V1000
--
V1377
V--Memory, user data (V)
256
3072
11264
V400-- V777
V1400 -- V7377
V10000 -- V35777
V--Memory, system (V)
256
V7600 -V36000 --
V7777
V37777
Ethernet Communications Modules, 3rd Edition Rev C, 06/11
+
Data Type
0
--
255
Input Register
512
--
767
Input Register
256
768
4096
----
511
3839
15359
Holding Register
3968
15360
---
4095
16383
Holding Register
MODBUS TCP/IP for H0/H2/H4--ECOM100
DL430 Memory Type
QTY
(Dec.)
PLC Range
(Octal)
For Discrete Data Types .... Convert PLC Addr. to Dec.
MODBUS
Address Range
(Decimal)
+
Start of Range
MODBUS
Data Type
+ Data Type
Inputs (X)
320
X0
--
X477
2048
--
2367
Input
Special Relays (SP)
288
SP0
SP320
---
SP137
SP617
3072
3280
---
3167
3471
Input
Outputs (Y)
320
Y0
--
Y477
2048
--
2367
Coil
Control Relays (CR)
512
C0
--
C737
3072
--
3583
Coil
Timer Contacts (T)
128
T0
--
T177
6144
--
6271
Coil
Counter Contacts (CT)
128
CT0
--
CT177
6400
--
6527
Coil
Stage Status Bits (S)
384
S0
--
S577
5120
--
5503
Coil
Global I/O (GX)
512
GX0
--
GX777
0
--
511
Input
For Word Data Types ....
Timer Current Values (V)
Convert PLC Addr. to Dec.
128
V0
--
V177
Counter Current Values (V) 128
V1000
--
V--Memory, user data (V)
3072
V1400
V--Memory, system (V)
256
V7400
DL440 Memory Type
QTY
(Dec.)
+
Data Type
0
--
127
Input Register
V1177
512
--
639
Input Register
--
V7377
768
--
3839
Holding Register
--
V7777
3840
--
4095
Holding Register
MODBUS
Address Range
(Decimal)
MODBUS
Data Type
PLC Range
(Octal)
For Discrete Data Types .... Convert PLC Addr. to Dec.
+
Start of Range
+ Data Type
320
X0
--
X477
2048
--
2367
Input
Special Relays (SP)
352
SP0
SP320
---
SP137
SP717
3072
3280
---
3167
3535
Input
Outputs (Y)
320
Y0
--
Y477
2048
--
2367
Coil
Control Relays (CR)
1024
C0
--
C1777
3072
--
4095
Coil
Timer Contacts (T)
256
T0
--
T377
6144
--
6399
Coil
Counter Contacts (CT)
128
CT0
--
CT177
6400
--
6527
Coil
Stage Status Bits (S)
1024
S0
--
S1777
5120
--
6143
Coil
Global I/O (GX)
1024
GX0
--
GX1777
0
--
1023
Input
256
V0
--
V377
Counter Current Values (V) 128
V1000
--
V--Memory, user data (V)
V--Memory, system (V)
+
Data Type
0
--
255
Input Register
V1177
512
--
639
Input Register
3072
4096
V1400 -- V7377
V10000 -- V17777
768
4096
---
3839
8191
Holding Register
288
V700 -- V737
V7400 -- V7777
448
3840
---
479
4095
Holding Register
Ethernet Communications Modules, 3rd Edition Rev C, 06/11
MODBUS TCP
H0/H2--ECOM100
Timer Current Values (V)
Convert PLC Addr. to Dec.
Installation and
Inputs (X)
For Word Data Types ....
5--9
5--10
MODBUS TCP for H0/H2/H4--ECOM100
DL450 Memory Type
QTY
(Dec.)
PLC Range
(Octal)
For Discrete Data Types .... Convert PLC Addr. to Dec.
Inputs (X)
1024
Special Relays (SP)
512
Outputs (Y)
MODBUS
Address Range
(Decimal)
+
Start of Range
MODBUS
Data Type
+ Data Type
X0
--
X1777
2048
--
3071
Input
SP0
SP320
---
SP137
SP717
3072
3280
---
3167
3535
Input
1024
Y0
--
Y1777
2048
--
3071
Coil
Control Relays (CR)
2048
C0
--
C3777
3072
--
5119
Coil
Timer Contacts (T)
256
T0
--
T377
6144
--
6399
Coil
Counter Contacts (CT)
256
CT0
--
CT377
6400
--
6655
Coil
Stage Status Bits (S)
1024
S0
--
S1777
5120
--
6143
Coil
Global Inputs (GX)
1536
GX0
--
GX2777
0
--
1535
Input
Global Outputs (GY)
1536
GY0
--
GY2777
0
--
1535
Coil
For Word Data Types ....
256
V0
--
V377
Counter Current Values (V) 256
V1000
--
V--Memory, user data (V)
3072
12288
V--Memory, system (V)
320
+
Data Type
0
--
255
Input Register
V1377
512
--
767
Input Register
V1400 -V10000 --
V7377
V37777
768
4096
---
3839
16383
Holding Register
V700
V7400
V777
V7777
448
3840
---
768
4095
Holding Register
---
MODBUS TCP
H0/H2--ECOM100
Timer Current Values (V)
Convert PLC Addr. to Dec.
Ethernet Communications Modules, 3rd Edition Rev C, 06/11
MODBUS TCP/IP for H0/H2/H4--ECOM100
5--11
The following examples show how to generate the MODBUS address and data type
for hosts which require this format.
Example 1: V2100
Find the MODBUS address for User V
location V2100.
1. Find V--Memory in the table.
2. Convert V2100 into decimal (1089).
3. Use the MODBUS data type from the table.
PLC Address (Dec.) + Data Type
V2100 = 1088 decimal
1088 + Hold. Reg. = Holding Reg. 1089
Example 2: Y20
Find the MODBUS address for output Y20.
PLC Addr. (Dec) + Start Addr. + Data Type
1. Find Y outputs in the table.
Y20 = 16 decimal
2. Convert Y20 into decimal (16).
16 + 2049 + Coil = Coil 2065
3. Add the starting address for the range
(2049).
4. Use the MODBUS data type from the table.
Example 3: T10
Current Value
Find the MODBUS address to obtain the
current value from Timer T10.
1. Find Timer Current Values in the table.
2. Convert T10 into decimal (8).
3. Use the MODBUS data type from the table.
Example 4: C54
Find the MODBUS address for Control Relay PLC Addr. (Dec) + Start Addr. +Data Type
C54.
C54 = 44 decimal
1. Find Control Relays in the table.
44 + 3072 + Coil = Coil 3117
2. Convert C54 into decimal (44).
3. Add the starting address for the range
(3072).
4. Use the MODBUS data type from the table.
PLC Address (Dec.) + Data Type
TA10 = 8 decimal
8 + Input Reg. = Input Reg. 8
Installation and
MODBUS TCP
H0/H2--ECOM100
Ethernet Communications Modules, 3rd Edition Rev C, 06/11
5--12
MODBUS TCP for H0/H2/H4--ECOM100
If the Host Software Some MODBUS TCP clients do not allow you to specify the MODBUS data type and address.
or Client Requires an Instead, you specify an address only. This method requires another step to determine the
address, but it is not difficult. Basically, MODBUS also separates the data types by address
Address ONLY
ranges as well. This means an address alone can actually describe the type of data and
location. This is often referred to as “adding the offset”.
The actual equation used to calculate the address depends on the type of PLC data you are
using. The PLC memory types are split into two categories for this purpose.
• Discrete -- X, GX, SP, Y, CR, S, T, C (contacts)
• Word -- V--Memory , Timer current value, Counter current value
In either case, you basically convert the PLC octal address to decimal and add the
appropriate MODBUS starting address (as required). The following tables show the exact
range used for each group of data.
NOTE: For an automated MODBUS/Koyo address conversion utility, download the file
modbus_conversion.xls from the www.automationdirect.com website.
Discrete Data Types*
PLC Memory Type
Global Inputs (GX)
QTY (Dec.)
2048
PLC Range
(Octal)
GX0--GX1746
MODBUS Address
Access
Range
10001--10999
GX1747 -- GX3777
11000--12048
Inputs (X)
1024
X0 -- X1777
12049 -- 13072
Special Relays (SP)
512
SP0-- SP777
13073 -- 13584
--
--
13585 -- 20000
Global Outputs (GY)
2048
GY0-- GY3777
1 -- 2048
Outputs (Y)
1024
Y0 -- Y1777
2049 -- 3072
Control Relays (CR)
2048
C0 -- C3777
3073 -- 5120
Timer Contacts (T)
256
T0 -- T377
6145 -- 6400
Counter Contacts (CT)
256
CT0 -- CT377
6401 -- 6656
Stage Status Bits (S)
1024
S0 -- S1777
5121 -- 6144
--
--
6657 -- 10000
Reserved
Reserved
MODBUS TCP
H0/H2--ECOM100
* Refer to your PLC user manual for the correct memory mapping size of your PLC.
Some of the addresses shown above might not pertain to your particular CPU.
Ethernet Communications Modules, 3rd Edition Rev C, 06/11
Read
only
Read/
Write
MODBUS TCP/IP for H0/H2/H4--ECOM100
5--13
Word Data Types*
Registers
(Word)
QTY (Dec.)
PLC Range
(Octal)
MODBUS 40001
Address Range
MODBUS 30001
Address Range
V--Memory (Timers)
256
V0 -- V377
40001 -- 40256
30001 -- 30256
V--Memory (Counters)
256
V1000 -- V1377
40513 -- 40768
30513 -- 30768
V--Memory (Data
Words)
256
V400 -- V777
40257 -- 40512
30257 -- 30512
3072
V1400 -- 7377
40769 -- 43840
30769 -- 33840
5903
V10000 -- V23416
44097 -- 49999
34097 -- 39999
5361
V23417 -- V35777
410000 -- 415360
310000 -- 315360
128
V7600 -- V7777
43969 -- 44096
33969 -- 34096
1024
V36000 -- V37777
415361 -- 416384
315361 -- 316384
V--Memory
(Remote Inputs)
128
V40000 -- V40177
416385 -- 416512
316385 -- 316512
Read
only
V--Memory
(Remote Outputs)
128
V40200 -- V40377
416513 -- 416640
316513 -- 316640
Read/
Write
V--Memory
(Input Points)
64
V40400 -- V40477
416641 -- 416704
316641 -- 316704
Read
only
V--Memory
(Output Points)
64
V40500 -- V40577
416705 -- 416768
316705 -- 316768
Read/
Write
V--Memory
(Control Relays)
128
V40600 -- V40777
416769 -- 416896
316769 -- 316896
V--Memory
(Timers Status Bits)
16
V41100 -- V41117
416961 -- 416976
316961 -- 316976
V--Memory
(Counter Status Bits)
16
V41140 -- V41157
416993 -- 417008
316993 -- 317008
V--Memory
(Special Relays)
32
V41200 -- V41237
417025 -- 417056
317025 -- 317056
V--Memory
(System Parameters)
Access
Read/
Write
Read
only
Installation and
* Refer to your PLC user manual for the correct memory mapping size of your PLC.
Some of the addresses shown above might not pertain to your particular CPU.
MODBUS TCP
H0/H2--ECOM100
Ethernet Communications Modules, 3rd Edition Rev C, 06/11
5--14
MODBUS TCP for H0/H2/H4--ECOM100
Example 1: V2100
Find the MODBUS address for User V
location V2100.
1. Find V--Memory in the table.
2. Convert V2100 into decimal (1088).
3. Add the MODBUS starting address for the
mode (40001).
PLC Address (Dec.) + Mode Address
V2100 = 1088 decimal
1088 + 40001 = 41089
Find the MODBUS address for output Y20.
PLC Addr. (Dec) + Start Address + Mode
1. Find Y outputs in the table.
Y20 = 16 decimal
2. Convert Y20 into decimal (16).
16 + 2048 + 1 = 2065
3. Add the starting address for the range
(2048).
4. Add the MODBUS address for the mode
(1).
Example 3: C54
Find the MODBUS address for Control Relay PLC Addr. (Dec) + Start Address + Mode
C54.
C54 = 44 decimal
1. Find Control Relays in the table.
44 + 3072 + 1 = 3117
2. Convert C54 into decimal (44).
3. Add the starting address for the range
(3072).
4. Add the MODBUS address for the mode
(1).
MODBUS TCP
H0/H2--ECOM100
Example 2: Y20
Ethernet Communications Modules, 3rd Edition Rev C, 06/11
MODBUS TCP/IP for H0/H2/H4--ECOM100
5--15
Network Client (master) Operation
This section describes how the DL05/06/205/405 CPU can serve as a client on a
MODBUS TCP network using the H0/H2/H4--ECOM100. This section discusses how to
design the required ladder logic for network client operation.
Client
MODBUS TCP Servers
Slave #1
Slave #2
Slave #3
MODBUS TCP Protocol
When using the ECOM100 as a client on the
network, you use simple RLL instructions to
initiate the requests. The WX instruction
initiates network write operations, and the RX
instruction initiates network read operations.
Before executing either the WX or RX
commands, we need to load data related to
the read or write operation onto the CPU’s
accumulator stack. When the WX or RX
instruction executes, it uses the information
on the stack combined with data in the
instruction box to completely define the task.
Client
Slave
WX (write)
RX (read)
Network
MODBUS
Function Code
Function
DL05/06/205/405
Data Types Available
Read Output Table
Y, C, T, CT
02
Read Input Table
X, SP
03
Read Holding Registers (when addressing
mode is 584/984, this function is used to access analog output registers)
V
15
Force Multiple Outputs
Y, C, T, CT
16
Preset Multiple Registers
V
NOTE: The H0/H2/H4--ECOM100, as a client/master, does not support function
code 4. Thus, 30001 address ranges cannot be read from a server/slave device.
Ethernet Communications Modules, 3rd Edition Rev C, 06/11
MODBUS TCP
H0/H2--ECOM100
01
Installation and
MODBUS Function The H0/H2/H4--ECOM100 supports the following MODBUS function codes when
Codes Supported acting as a MODBUS TCP client.
5--16
MODBUS TCP for H0/H2/H4--ECOM100
PLC Memory
Supported for
Client Operation
The actual equation used to calculate the address depends on the type of PLC data you are
using. The PLC memory types are split into three categories for this purpose.
• Discrete -- X, GX, SP
• Discrete -- Y, CR, S, T, C
• Word -- Timer current value, Counter current value, Data Words
In either case, you basically take the MODBUS address you are trying to target, subtract the
starting MODBUS of that range, convert the result to octal and add the octal number to the
begining PLC address in the appropriate PLC range. See the conversion examples on the
following page. The following tables show the exact range used for each group of data.
NOTE: For an automated MODBUS/Koyo address conversion utility, download the file
modbus_conversion.xls from the www.automationdirect.com website.
Discrete Data Types*
PLC Memory Type
Global Inputs (GX)
PLC Range
(Octal)
QTY (Dec.)
2048
GX0--GX1746
MODBUS Address
Access
Range
10001--10999
GX1747 -- GX3777
11000--12048
Inputs (X)
1024
X0 -- X1777
12049 -- 13072
Special Relays (SP)
512
SP0-- SP777
13073 -- 13584
--
--
13585 -- 20000
Global Outputs (GY)
2048
GY0-- GY3777
1 -- 2048
Outputs (Y)
1024
Y0 -- Y1777
2049 -- 3072
Control Relays (CR)
2048
C0 -- C3777
3073 -- 5120
Timer Contacts (T)
256
T0 -- T377
6145 -- 6400
Counter Contacts (CT)
256
CT0 -- CT377
6401 -- 6656
Stage Status Bits (S)
1024
S0 -- S1777
5121 -- 6144
--
--
6657 -- 10000
Reserved
Reserved
Read
only
Read/
Write
Word Data Types*
MODBUS TCP
H0/H2--ECOM100
Registers
(Word)
PLC Range
(Octal)
QTY (Dec.)
MODBUS Address
Access
Range
V--Memory (Timers)
256
V0 -- V377
40001 -- 40256
V--Memory (Counters)
256
V1000 -- V1377
40513 -- 40768
V--Memory (Data Words)
256
V400 -- V777
40257 -- 40512
3072
V1400 -- 7377
40769 -- 43840
5903
V10000 -- V23416
44097 -- 49999
5361
V23417 -- V35777
410000 -- 415360
128
V7600 -- V7777
43969 -- 44096
1024
V36000 -- V37777
415361 -- 416384
V--Memory
(System Parameters)
Read/
Write
* Refer to your PLC user manual for the correct memory mapping size of your PLC.
Some of the addresses shown above might not pertain to your particular CPU.
Ethernet Communications Modules, 3rd Edition Rev C, 06/11
MODBUS TCP/IP for H0/H2/H4--ECOM100
5--17
NOTE: Your PC’s Windows calculator can be used for number conversions (i.e. decimal to
octal). The Windows calculator must be in Calculator>View>Scientific mode to enable number
conversions capability.
Example 1:
Calculating Word
PLC Address
Example 2:
Calculating Discrete
Input PLC Address
Find the PLC address to use to target MODBUS
address 41025 in a server device.
1. Subtract the begining of the MODBUS word
address range (40001) from the desired
MODBUS address to target.
2. Convert decimal result into octal.
3. Add octal result to begining PLC range
(Input, Output or Word).
Find the PLC address to use to target MODBUS
address 12060 in a server device.
1. Subtract the begining of the MODBUS Input
address range (12049) from the desired
MODBUS address to target.
2. Convert decimal result into octal.
3. Add octal result to begining PLC range
(Input, Output or Word).
1. 41025 -- 40001 = 1024 decimal
2. 1024 decimal = 2000 octal
3. V0 (octal) + 2000 (octal) = V2000 octal
1. 12060 -- 12049 = 11 decimal
2. 11 decimal = 13 octal
3 X0 (octal) + 13 (octal) = X13 octal
Installation and
MODBUS TCP
H0/H2--ECOM100
Ethernet Communications Modules, 3rd Edition Rev C, 06/11
5--18
MODBUS TCP for H0/H2/H4--ECOM100
Building the
Read (RX) or
Write (WX)
Routine
For network communications, you build the
Read (RX) or Write (WX) instructions into a
routine which requires the four instructions
you see to the right. They must be used in the
sequence shown. The following step-by-step
procedure will provide you the information
necessary to set up your ladder program to
receive data from a network server.
LD
A aaa
LD
A aaa
LDA
O aaa
RX or WX
A aaa
Step 1:
Identify ECOM Slot
Location and
Server Node #
The first Load (LD) instruction accepts either a constant or a variable.
Use a “K” to designate the number as a constant. Use a “V” if you are
entering the address of a register. The contents of that register perform
the same function as the constant shown below. For example, you could
use V2000 in place of K0114. If the contents of V2000 is the number
“114,” the function would be the same. Using a variable allows changing
parameters while the program is running.
Upper Byte
Lower Byte
Initiating PLC/ECOM
(Client)
Initiating PLC
See page 2-7 and 2-8 about
slot numbers.
Ethernet Communications Modules, 3rd Edition Rev C, 06/11
K114
Responding
device (Server)
ECOM Slot Number
MODBUS TCP
H0/H2--ECOM100
Base Number
CPU Base = 0
Expansion Base = 1, 2 or 3
See page 2-7 and 2--9 about using ECOMs in local expansion or
in remote I/O bases.
K 0 1 1 4
LD
Server Node #
Responding Device on Network
See page 3--10 or 6--4 about
assigning a node number to a
server’s IP address
5--19
MODBUS TCP/IP for H0/H2/H4--ECOM100
Step 2:
Load Number of
Bytes to Transfer
Step 3:
Specify Master
Memory Area
The second Load (LD) instruction
determines the number of bytes which will
be transferred between the master and
slave in the subsequent WX or RX
instruction. The value to be loaded is in
BCD format (decimal), from 1 to 128
bytes.
The third instruction in the RX or WX
sequence is a Load Address (LDA)
instruction. Its purpose is to load the
starting address of the memory area to be
transferred. Entered as an octal number,
the LDA instruction converts it to hex and
places the result in the accumulator.
For a WX instruction, the CPU sends the
number of bytes previously specified from
its memory area beginning at the LDA
address specified.
For an RX instruction, the CPU reads the
number of bytes previously specified from
the server, placing the received data into
its memory area beginning at the LDA
address specified.
1
2
8
(BCD)
# of bytes to transfer
LD
K128
4
0
6
0
0
(octal)
Starting address of
client transfer area
LDA
O40600
MSB
V40600
LSB
15
0
MSB
V40601
LSB
15
0
Step 4:
Specify Slave
Memory Area
The last instruction in our sequence is the
WX or RX instruction itself. Use WX to
write to the server, and RX to read from the
server. All four of our instructions are
shown to the right. In the last instruction,
you must specify the starting address and
a valid data type for the server.
SP122
LD
K114
LD
K128
Installation and
NOTE: Since V--memory words are always 16 bits, you may not always use the
whole word. For example, if you only specify to read 3 bytes, you will only get 24 bits
of data. In this case, only the 8 least significant bits of the last word location will be
modified. The remaining 8 bits are not affected.
LDA
O40600
Ethernet Communications Modules, 3rd Edition Rev C, 06/11
MODBUS TCP
H0/H2--ECOM100
RX
V0
5--20
MODBUS TCP for H0/H2/H4--ECOM100
Communications
from a
Ladder Program
Typically network communications will
last longer than 1 scan. The program must
wait for the communications to finish
before starting the next transaction.
SP123
Y1
SET
SP122
LD
K114
ECOM Communication
Error
LD
K3
ECOM Port Busy
LDA
O40600
RX
V0
Depending on which slot the ECOM is in, it has two Special Relay contacts
associated with it (see page 4--11 to 4--12 for special relays). One indicates “Port
busy”, and the other indicates “Port Communication Error”. The example above
shows the use of these contacts for an ECOM that is in slot 1. The “Port Busy” bit is
on while the PLC communicates with the slave. When the bit is off the program can
initiate the next network request.
The “Port Communication Error” bit turns on when the PLC has detected an error.
Use of this bit is optional. When used, it should be ahead of any network instruction
boxes since the error bit is reset when an RX or WX instruction is executed.
If you are using multiple reads and writes
in the RLL program, you have to interlock
the routines to make sure all the routines
are executed. If you don’t use the
interlocks, then the CPU will only execute
the first routine. This is because each port
can only handle one transaction at a time.
In the example to the right, after the RX
instruction is executed, C0 is set. When
the port has finished the communication
task, the second routine is executed and
C0 is reset.
If you’re using RLL PLUS Stage
Programing, you can put each routine in a
separate program stage to ensure proper
execution and switch from stage to stage
allowing only one of them to be active at a
time.
MODBUS TCP
H0/H2--ECOM100
Multiple Read and
Write Interlocks
Ethernet Communications Modules, 3rd Edition Rev C, 06/11
Interlocking Relay
SP122 C100
LD
K114
LD
K3
LDA
O40600
Interlocking
Relay
SP122 C100
RX
V0
C100
SET
LD
K114
LD
K3
LDA
O40400
WX
V0
C100
RST
5--21
MODBUS TCP/IP for H0/H2/H4--ECOM100
H0/H2/H4--ECOM100 System Memory
H0/H2/H4--ECOM100
Module Version
Information
Device Data
Words
(16--bit)
Word Descriptions
Access
317501 -- 317506;
(417501 -- 417506)*
6
1
2
3
4
5
6
Read
only
317507 -- 317510
(417507 -- 417510)
--
Reserved
--
317511 -- 317600;
(417511 -- 417600)*
90
1 -- Version of Device
2 -- Family
3 -- Processor
4 -- Module Type
5 -- Status Code
(6--8) -- Ethernet Address
9 -- RAM Size
10 -- Flash Size
11 -- Batt RAM Size
12 -- DIP Settings
13 -- Media Type
(14--15) -- EPF Count (if supported)
16 -- Run Relay State (if supported)
17 -- Batt Low (if supported)
18 -- Model Number
19 -- Ethernet Speed
(20--90) -- Reserved
Read
only
317601 -- 318500
(417601 -- 418500)
--
Reserved
--
418001 -- 418020
20
(1--3) -- Reserved
Read/
4 -- Flags:
Write
Bit 0: If 1, module has rebooted
since this bit was cleared, a write to
the Flags word with this bit set will
clear this reboot bit.
Bit (1--7) -- Reserved
5 -- Reboot Count (LSW) -- Read Only
6 -- Reboot Count (MSW) -- Read Only
(7--20) -- Reserved
418021 -- 419250
--
Reserved
-------
OS Major Version
OS Minor Version
OS Build Version
Booter Major Version
Booter Minor Version
Booter Build Version
Installation and
Dynamic
Module Data
Modbus Addressing
Range (Decimal)
--
Ethernet Communications Modules, 3rd Edition Rev C, 06/11
MODBUS TCP
H0/H2--ECOM100
*For clients that only support function code 3 to read word data.
H0/H2/H4--ECOM100
DHCP &
HTML Configuration
6
— H0/H2/H4--ECOM100 DHCP
— Disabling DHCP and Assigning a Static IP Address
— Using HTML Configuration
6--2
DHCP & HTML Configuration
DHCP & HTML
Configuration
H0/H2/H4--ECOM100 DHCP
DHCP Issues
The H0/H2/H4--ECOM100 is configured at the factory to look for a DHCP (Dynamic
Host Configuration Protocol) server at power up. DHCP provides a way to allocate IP
address dynamically to devices on a local area network (LAN). A system or network
administrator configures a DHCP server with a range of IP addresses that can be
assigned to DHCP enabled clients/servers (i.e. H0/H2/H4--ECOM100).
In addition to an IP address, a DHCP server can provide other information such as
DNS domain or a gateway IP address.
DHCP uses the concept of a “lease” or amount of time that an assigned IP address
will be valid for a client. The lease time can vary depending on how long a user is
likely to require the network connection at a particular location. Since the TCP/IP
configuration is “leased” to the client, that is, it’s not a permanent configuration. This
information can change from one power up session to the next. While this is an
acceptable solution for the initial testing and setup of your H0/H2/H4--ECOM100
device, we do not recommend that you use DHCP to assign IP addresses for your
runtime operation. Use NetEdit3.5 or the H0/H2/H4--ECOM100’s HTML
Configuration page to assign a static IP address to the module (shown below).
NetEdit3.5 can be used to connect to a H0/H2/H4--ECOM100 using the IPX
protocol, regardless of the IP address that was assigned to it by a DHCP server.
Disabling DHCP and Assigning a Static IP Address
You can use NetEdit3.5 or the H0/H2/H4--ECOM100’s HTML Configuration page to
disable DHCP and assign a static IP address to the module. Click on the Use the
following IP Address button and enter a valid IP address for your network
application.
.
NetEdit3.5 (refer to chapter 3)
HTML Configuration
Ethernet Communications Modules, 3rd Edition Rev. C, 06/11
DHCP & HTML Configuration
6--3
Using HTML Configuration
Connecting to the
H0/H2/H4-ECOM100
Enter the module’s IP address in
your browsers Address field.
Connecting to the module’s HTML
Configuration utility brings up the
window below
To configure the module, click on the desired parameter field. A new window will
open, which are all described below and on the following page. Clicking the Back
button will take you back to the main configuration screen shown above. Clicking the
Send button writes the entry or change to the module’s flash memory and clicking
the Reset button reads the module’s flash memory.
Module ID: Module IDs must be unique for each ECOM, but they do not have to be in
sequence. The module’s DIP switches must both be set to allow the HTML
configuration tool to set a Module ID. Do not use address zero for communications.
Module Name field and Module
Description fields are optional to
identify the module. Click the
Send button to write to the
module’s flash memory.
Ethernet Communications Modules, 3rd Edition Rev. C, 06/11
DHCP & HTML
Configuration
The H0/H2/H4--ECOM100 can be configured by using your PC’s internet browser to
access the module’s HTML configuration page. This method of configuration uses
the TCP protocol, so you must know the H0/H2/H4--ECOM100’s IP address to
establish communications. The IP address may have been assigned by a DHCP
server (default) or may have been set by using NetEdit3.5 or later.
DHCP & HTML
Configuration
6--4
DHCP & HTML Configuration
Ethernet Address: this is the MAC Address. It is a factory-assigned address that is
on the permanent label on the module.
IP Configuration: Set IP
Address, Subnet Mask and
Gateway addresses. Click the
Send button to write to the
module’s flash memory.
The module’s current Booter Version and OS Version are listed. The latest
versions can be found by clicking Hosteng.com in the Firmware Updates field.
The module’s current CPU Rev and PWB/PLD Rev are listed. The latest versions
can be found by clicking Hosteng.com in the Firmware Updates field.
Firmware Updates: If your PC is connected to the internet, clicking on Hosteng.com
will take you to Host Engineering’s web site where the most current firmware files are
available for downloading to your PC. You must use NetEdit3.5 or later to upgrade
the module.
Ethernet Communications Modules, 3rd Edition Rev. C, 06/11
DHCP & HTML Configuration
Peer to Peer: The following are reasons or conditions of when to configure the
H0/H2/H4--ECOM100 for peer to peer communications with a TCP/IP server device:
• To eliminate network broadcast traffic when the ECOM100 is a client
executing RX/WX network instructions.
•
When an ECOM100 is an “ECOM protocol client” and needs to access
other server ECOMs through a router.
•
When an ECOM100 needs to serve as MODBUS TCP client
The default configuration window is shown below.
Device Number: This is a “RX/WX node number” that is associated with the server’s
IP address that is entered in the field beside the Device number. This node or server
(slave) number is used in the RX/WX instruction.
LD
K0101
This is the first LD box of the
RX/WX instruction. It specifies the
ECOM slot number and the server
(slave) node number. Use the
Device number here.
IP Address: Enter the server’s IP address in the field beside the Device
Number. Again, this associates the Device Number to the the entered IP
address.
IP Protocol: Select the protocol that the client H0/H2/H4--ECOM100 will be
using to communicate with the server device. Select the ECOM radio button if
the target device is another ECOM module. Select the MODBUS TCP button
if the target device is a MODBUS TCP server.
Ethernet Communications Modules, 3rd Edition Rev. C, 06/11
DHCP & HTML
Configuration
H0/H2/H4-ECOM100 Client
Peer to Peer
Configuration
6--5
DHCP & HTML
Configuration
6--6
DHCP & HTML Configuration
The Port Number and Unit ID are only used if the H0/H2/H4--ECOM100 client is
trying to communicate with a MODBUS TCP server device through a firewall or an
Ethernet--to--serial converter.
Port Number: The MODBUS TCP specification states that all MODBUS TCP
devices respond to (server) and send (client) on port 502. This will allow a MODBUS
TCP server device to communicate with an H0/H2/H4--ECOM100 MODBUS TCP
client through a firewall.
Unit ID: The Unit ID may be required for the following applications:
• MODUS/TCP--to--MODUS/RTU converters: These devices convert
Ethernet (TCP) packets to serial (RTU) communications. The Unit ID
field is used to direct the TCP packet to the correct, serially connected
RTU slave device.
• Some MODUS/TCP slave devices require this; It may be a holdover
from an old serial device driver that was converted to Ethernet. The
slave device usually requires the Unit ID to be set to “255”, but in some
instances the slave requires the Unit ID to be set to “0”. The Modicon
specification states to use Unit ID set to “255”. If communications are
unsuccessful, it is recommended to try Unit ID of “0”. It is possible you
may need to get the actual Unit ID setting from the slave device
documentation or manufacturer.
Ethernet Communications Modules, 3rd Edition Rev. C, 06/11
Maintenance and
Troubleshooting
In This Chapter. . . .
— Isolating a Communication Problem
— Troubleshooting Chart
— ECOM Module Diagnostic LEDs
— Using NetEdit3 for Troubleshooting
— Replacing the ECOM Module
17
7--2
Maintenence & Troubleshooting
Maintenance and
Troubleshooting
Isolating a Communication Problem
If you are experiencing a problem communicating with an ECOM module, the
problem can usually be isolated to one of four components of the communication
link:
S the ECOM module itself (hardware or firmware)
S the communication program or the setup of the ECOM module
S the cabling and connections
S other external influences, such as electrical noise, heavy communication
traffic on the network or exceeding the PLC power budget
You can also use your PC’s DOS “Ping” command to verify communications with a
network server. The PC’s NIC must have the TCP/IP protocol enabled and the
server must have a valid IP address. Visit www.microsoft.com for information on the
“Ping” command.
Diagnostic Tools
and Techniques
Several available tools and techniques can help you isolate a communication
problem:
S The LEDs on the face of the module indicate the status of the link, the
module, and the network communications.
S NetEdit3 displays a list of the active modules on the network and their
protocol and configuration settings.
S Cable testing devices can pinpoint short or open circuits or diagnose
attenuation problems and other cabling problems.
Troubleshooting Chart
The following chart summarizes the different types of communication failures you
could experience. In each case the CPU PWR LED must be on, and you must be
attempting to communicate with the ECOM in question. You must be attempting to
send or receive RX/WX instructions or you must be attempting to link to the ECOM
using our KEPDirect for PLCs or other software driver.
The meaning of the diagnostic LEDs is explained begining on page 7-4.
Troubleshooting Chart
Legend:
Off
ECOM Module LEDs
ECOM(--F)
LINK/LINKGD
ACT
ERROR/ERR
ECOM(--F)
OR
ECOM100
OK / STATUS
LINKGD/LINK
ACTIVE/ACT
ERROR/ERR
LINK/LINKGD
ACT
ERROR/ERR
ECOM100
OR
OK / STATUS
LINKGD/LINK
ACTIVE/ACT
ERROR/ERR
Ethernet Communications Modules, 3rd Edition Rev. C, 06/11
On
Flash
Corrective Action
1. Cycle power to the PLC. This will clear
the error if it was due to a transient
condition.
2. Replace ECOM module
Maintenance and Troubleshooting
7--3
Troubleshooting Chart (Continued)
Legend:
Off
ECOM Module LEDs
ECOM100
LINK/LINKGD
ACT
ERROR/ERR
Flash
Corrective Action
1. Try another cable that you know works.
Check pinouts (see page 2-12).
2. Try another port on the hub or
another hub.
3. Replace ECOM module.
1. Are PLCs in RUN mode? Some communications require initiating and responding
PLCs to be in RUN mode.
ECOM100
OK / STATUS
LINKGD/LINK
ACTIVE/ACT
ERROR/ERR
ECOM(--F)
LINK/LINKGD
ACT
ERROR/ERR
2. Try another cable between PC and hub
or the other communicating ECOM and
hub.
3. Try another port on the hub or another
hub.
4. Make sure you have not exceeded the
recommended cable length for your
network cable. The link signal could
arrive with sufficient strength even
though the data transmission does not.
5. Could be related to Windows configuration. Consult Windows documentation.
Note: This is also the indication of proper
operation! Troubleshoot only if you are
failing to exchange data.
ECOM(--F)
LINK/LINKGD
ACT
ERROR/ERR
ECOM(--F)
OR
ECOM100
OK / STATUS
LINKGD/LINK
ACTIVE/ACT
ERROR/ERR
LINK/LINKGD
ACT
ERROR/ERR
ECOM100
OR
1. Try another cable between PC and hub
or other ECOM and hub.
2. Try another port on the hub or another
hub.
3. Confirm that ECOM module is in a usable
slot in the PLC base (see pages 2-7 to 2-9)
and that the CPU and CPU firmware support the ECOM module.
4. Look for errors in the setup of the ECOM
module or in the communication program.
OK / STATUS
LINKGD/LINK
ACTIVE/ACT
ERROR/ERR
Ethernet Communications Modules, 3rd Edition Rev. C, 06/11
Maintenance and
Troubleshooting
OK / STATUS
LINKGD/LINK
ACTIVE/ACT
ERROR/ERR
ECOM(--F)
On
7--4
Maintenence & Troubleshooting
ECOM Module Diagnostic LEDs
H0 Series
Indicators
The H0 series ECOM module has four status indicators. The table below explains
the status for each indicator.
Indicator
OK
(H0--ECOM only)
Maintenance and
Troubleshooting
LINK
ACT
ERR
100
(H0--ECOM100 only)
OK Indicator
LINK indicator
ACT Indicator
ERR Indicator
100MBIT
Indicator
Status
Description
ON -- GREEN
Module is powered up and functional
OFF
Module powerup failed
ON -- GREEN
Properly connected to network
OFF
Not connected to network or incorrect
configuration
ON or FLASHING RED
Active network data
OFF
Network idle
ON or FLASHING RED
A fatal error has occurred
OFF
No error present
ON --GREEN
Ethernet data is detected at 100MBit
OFF
(with ACT LED ON) -- Ethernet data is
detected at 10MBit
The green OK LED on the H0--ECOM module is on steady after a successful
powerup. If the LED fails to turn on, the module failed to powerup. It may not be
properly installed or it may be defective.
The green LINK (link good) LED is on steady when the ECOM module is correctly
connected to an active device on the network and is receiving 5VDC operating
voltage from the PLC power supply. The LINK LED verifies that the proper cables are
connected, and the ECOM module is functioning correctly. If a mismatch with the
10/100BaseT connections occurs this LED will not be illuminated.
The red ACT (activity) LED flashes to indicate that the module sees data travelling
on the network. If any network device is sending or receiving data, the ACT LED will
be illuminated. In idle mode (no network traffic) this LED is OFF. During heavy
communication loads this LED will be steady on.
If the ECOM module’s red ERROR indicator is flashing or steady on, a fatal error
has occurred. The error may be in the ECOM module itself, or a network problem
may be causing this symptom. The ERROR indication can be caused by a faulty
ground, an electrical spike or other types of electrical disturbances. Cycle power to
the system to attempt clearing the error.
The green 100 (100MB) LED is on steady when Ethernet data is detected at
100BaseT frequency. (H0--ECOM100 only)
Ethernet Communications Modules, 3rd Edition Rev. C, 06/11
Maintenance and Troubleshooting
H24--ECOM--(F)
Indicators
The table below describes the three status indicators on the H24--ECOM modules.
Indicator
LINKGD
ACT
ERROR
ACT Indicator
ERROR Indicator
Status
Description
ON -- GREEN
Properly connected to network
OFF
No connected to network or incorrect
configuration
FLASHES RED
Active network data
OFF
Network idle
ON or FLASHING RED
A fatal error has occurred
OFF
No error present
The green LINKGD (link good) LED is on steady when the H24--ECOM--(F) module
is correctly connected to an active device on the network and is receiving 5VDC
operating voltage from the PLC power supply. The LINKGD LED verifies that the
proper cables are connected, and the H24--ECOM--(F) module is functioning
correctly. If a mismatch with the 10BaseT or 10BaseFL connections occurs this LED
will not be illuminated.
The red ACT (activity) LED flashes to indicate that the module sees data travelling
on the network. If any network device is sending or receiving data, the ACT LED will
be illuminated. In idle mode (no network traffic) this LED is OFF. During heavy
communication loads this LED will be steady on.
If the H24--ECOM--(F) module’s red ERROR indicator is flashing or steady on, a
fatal error has occurred. The error may be in the H24--ECOM--(F) module itself, or a
network problem may be causing this symptom. The ERROR indication can be
caused by a faulty ground, an electrical spike or other types of electrical
disturbances. Cycle power to the system to attempt clearing the error.
Ethernet Communications Modules, 3rd Edition Rev. C, 06/11
Maintenance and
Troubleshooting
LINKGD indicator
7--5
7--6
Maintenence & Troubleshooting
H2/H4--ECOM100
Indicators
The H2/H4--ECOM100 module has several status indicators. The table below
explains the status for each indicator.
Indicator
STATUS
(H2--ECOM100 only)
LINKGD
Maintenance and
Troubleshooting
ACTIVE
ERROR
100MBIT
STATUS Indicator
LINKGD indicator
ACTIVE Indicator
ERROR Indicator
100MBIT
Indicator
Status
Description
ON -- GREEN
Module is powered up and functional
OFF
Module powerup failed
ON -- GREEN
Properly connected to network
OFF
Not connected to network or incorrect
configuration
ON or FLASHING RED
Active network data
OFF
Network idle
ON or FLASHING RED
A fatal error has occurred
OFF
No error present
ON
Ethernet data is detected at 100MBit
OFF
(with Active LED ON) -- Ethernet data is
detected at 10MBit
The green OK LED on the H2--ECOM100 module is on steady after a successful
powerup. If the LED fails to turn on, the module failed to powerup. It may not be
properly installed or it may be defective.
The green LINK (link good) LED is on steady when the H2/H4--ECOM100 module
is correctly connected to an active device on the network and is receiving 5VDC
operating voltage from the PLC power supply. The LINK LED verifies that the proper
cables are connected, and the H2/H4--ECOM100 module is functioning correctly. If
a mismatch with the 10/100BaseT or 10BaseFL connections occurs this LED will not
be illuminated.
The red ACTIVE (activity) LED flashes to indicate that the module sees data
travelling on the network. If any network device is sending or receiving data, the ACT
LED will be illuminated. In idle mode (no network traffic) this LED is OFF. During
heavy communication loads this LED will be steady on.
If the H2/H4--ECOM100 module’s red ERROR indicator is flashing or steady on, a
fatal error has occurred. The error may be in the H2--ECOM100 module itself, or a
network problem may be causing this symptom. The ERROR indication can be
caused by a faulty ground, an electrical spike or other types of electrical
disturbances. Cycle power to the system to attempt clearing the error.
The green 100M (100MB) LED is on steady when Ethernet data is detected at
100BaseT frequency.
Ethernet Communications Modules, 3rd Edition Rev. C, 06/11
Maintenance and Troubleshooting
7--7
Using NetEdit3 for Troubleshooting
NetEdit3 is a software utility which came with this manual. To review the procedures
for running and using NetEdit3, see pages 3--5 through 3--12. NetEdit3 allows you to:
S See active modules on the network.
S Examine and change the modules’ configuration settings.
S See the firmware revision number.
S Review statistical information about communication errors by type.
Select a Module
The Module box shows the Ethernet (MAC)
Addresses of all modules which are
currently linked to the NetEdit3 utility. If your
ECOM module is not on this list, try the
following:
S
Change Protocol selection and click on
Scan Network. See Change Protocol
on the next page.
S
Confirm that your PC has IPX or
TCP/IP protocol loaded.
Confirm that the ECOM module’s
LINKGD LED is on.
S
NOTE: The Ethernet (MAC) Address is permanently assigned at the factory, and it is
recorded on a label on the side of the ECOM module. See page 2-4 if you need help
locating the label.
Module Information The Module Information box gives the ECOM
module Type, firmware Version, Booter
firmware version and the address DIP switch
setting.
Verify
that
all
modules
of the same type have the same firmware
version.
Ethernet Communications Modules, 3rd Edition Rev. C, 06/11
Maintenance and
Troubleshooting
If you can see the ECOM module on the list in the Module box (described below), you
are linking to the module from your PC. If you are linking to the module but failing to
communicate with the module, you can conclude that:
S The module is working.
S The cabling is satisfactory from the PC to the hub and from the hub to the
ECOM module.
S The hub is working.
S The problem is in one of the other components of the communication link.
7--8
Maintenence & Troubleshooting
Change Protocol
If you are experiencing a problem
communicating from your PC to a module
that does not appear on the list of active
modules, try changing the protocol and
clicking on Scan Network. You may be able
to link to your module with the other protocol.
Maintenance and
Troubleshooting
If you are not sure which protocol you have loaded on your PC, refer to pages 3--4
and 3--5, as well as your Windows documentation. This protocol selection is only for
PC-to-PLC communications and has no effect on PLC-to-PLC communications.
Ethernet Stats
If you are able to see the problem module on the list of modules currently active on
the network, you can select the module to see the Ethernet Stats for that module.
Select the module by clicking on the Ethernet (MAC) Address in the Module box.
To begin a new statistical record, click the Clear Stats button.
The diagnostic information available in the Ethernet Stats box is:
S
S
S
S
S
S
Missed Frames -- frames lost
due to unavailability of buffer
space.
TX Collisions -- detected when
RXD+ and RXD-- become active during a data transmission. Two
devices are trying to communicate at the same time.
Lost Packets -- packets that overflow the queue.
Bad Packets -- packets that fit the Ethernet standard but are not in the
right format for the ECOM module.
Unknown Type -- a foreign command was received and could not be
interpreted. This will probably happen only during software driver
development.
Send Errors -- the Ethernet standard number of retries were attempted
for a transmission.
Ethernet Communications Modules, 3rd Edition Rev. C, 06/11
Maintenance and Troubleshooting
7--9
The RX/WX Settings box in this window provides a
place to make changes that affect PLC-to-PLC
communications only.
Change these settings only if:
S The LINK/LINKGD LED is on.
S The ACT LED is flashing.
S You have explored the module
configuration and RLL programming
for possible errors.
Record the
Module Settings
If you are replacing an existing module, record the existing network identifier settings in
the Configuration box. Set up the replacement module by linking to it with NetEdit3 and
inserting the same network identifiers in the Configuration box. Click on Update
Module to store the settings in the ECOM module’s flash memory.
Each module on the network must have a unique network identifier.
Maintenance and
Troubleshooting
RX/WX Settings
Ethernet Communications Modules, 3rd Edition Rev. C, 06/11
7--10
Maintenence & Troubleshooting
Maintenance and
Troubleshooting
Replacing the ECOM Module
If you are experiencing a communication problem, and you think the ECOM may be
defective, try replacing the ECOM module with a new one or one that you know is
working properly. If that corrects the problem, then the original module is probably
defective (assuming the replacement module was set up the same as the original
and no changes have been made to the communication program or other network
components). The diagnostic LEDs will help you determine which applies in this
case. If replacing the module does not correct the problem, then the problem is
probably not in the module.
If you are replacing an existing ECOM module with a new one, you need to set up the
new module with the same network identifiers as the module you are replacing. If
you used the DIP switch to set the Module ID, you will need to set the DIP switch on
the replacement module to the same Module ID. See pages 2-5 or 2-6 to review the
procedure for setting the Module ID using the DIP switch.
If you set up your original ECOM module using one of the software utilities, you will
need to refer to your record of the module’s network identifiers (see page 2-2) and
duplicate the settings in the new module using the same procedures. See page 3--5
through 3-12 to review the procedures for using the software utilities.
To replace the ECOM module, disconnect power from the PLC and remove the
original module. Insert the replacement ECOM module, connect the module to your
network and apply power to the PLC. Links to other network devices will
automatically be reestablished and communications between devices will resume.
WARNING: Your system can be damaged if you install or remove system
components before disconnecting the system power. To minimize the risk of
equipment damage, electrical shock, or personal injury, always disconnect
the system power before installing or removing any system component.
Ethernet Communications Modules, 3rd Edition Rev. C, 06/11
Maintenance and Troubleshooting
7--11
Diagnosing Network Cable Problems
It is a good maintenance practice to test network cables periodically and maintain a
permanent record of cable characteristics. A number of cable test instruments are
available to test 10/100BaseT and 10BaseFL networks. These instruments will
check the electrical or optical characteristics of your cabling, including:
S Continuity -- This is a check to make sure the communication pairs are
wired correctly, and that the wires are continuous from end to end. In the
case of fiber optic network this is a test to be sure light is transmitted
from one end of the cable to the other.
S Attenuation -- This refers to the amount of signal loss over the cable
segment at the signal frequency of interest. The 10/100BaseT
specification allows for a maximum signal loss of 11.5 decibels (dB) for
the entire link at the signal frequency used by 10Mbps Ethernet. The
10BaseFL specification calls for the optical loss in link segment to be no
greater than 12.5 dB.
S Crosstalk -- Crosstalk occurs when a signal in one pair of wires is
electromagnetically coupled to an adjacent pair. This is critical
for10BaseT networks which are susceptible to noise interference.
10BaseFL networks are virtually immune to noise interference.
NOTE: Any significant difference between the cable characteristics of the
transmitter and receiver can cause communication errors.
Ethernet devices continually monitor the receive data path for activity as a means of
verifying their link is working correctly. When the network is idle, each network device
(including the ECOM module) sends a periodic link test signal to verify that the
network is working. If the link test signal or other network activity is not received
periodically, the LINK/LINKGD LED on the ECOM module is turned off.
Ethernet Communications Modules, 3rd Edition Rev. C, 06/11
Maintenance and
Troubleshooting
If you are experiencing communication problems, swapping cables is one of the
simplest diagnostic procedures you can perform. If the network operates correctly
with a different cable, you have isolated and cured the problem. If possible, use a
short run of cable to test the network because problems with longer cable runs can
be more difficult to diagnose and are more often intermittent.
If you are unable to swap cables, verify the proper operation of all other network
components. You probably have a cable problem if you have verified that your:
S ECOM module is working correctly.
S ECOM module configuration is correct.
S RLL program or PC program is correct.
S hubs are working correctly.
S Windows configuration is correct.
S network adapter card is the correct type, and it is working correctly.
Appendix A
General
Specifications
In This Appendix
1A
— H0--ECOM Specifications
— H2--ECOM and H4--ECOM Specifications
— H0--ECOM100 Specifications
— H2--ECOM100 and H4--ECOM100 Specifications
— H2--ECOM--F and H4--ECOM--F Specifications
— Ethernet Standards
A--2
General Specifications
Appendix A
General Specifications
ECOM
Specifications
H0--ECOM
Module Type
Intelligent Data Communications Module
Quantity of Modules Per Base
Defined by CPU and base configuration
Diagnostics
LEDs/Network Monitoring Software (NetEdit3)
Communications
10BaseT Ethernet
Data Transfer
10 Million bits per second
Extension Port
RJ45
OK Indicator (OK)
Green LED
Link Good Indicator (LINK)
Green LED
Activity Indicator (ACT)
Red LED
Error Indicator (ERR)
Red LED
Power Consumption
250mA (Supplied by DL05/DL06 base)
Operating Temperature
32° to 140° F (0° to 60° C)
Storage Temperature
--4° to 158° F (--20° to 70° C)
Relative Humidity
30% -- 95% RH (non-condensing)
Environmental Air
No corrosive gases permitted
Networking Protocols Supported
TCP/IP, IPX
Manufacturer
Host Automation Products
Link Distance
100 meters (328 feet)
H2--ECOM / H4--ECOM
Module Type
Intelligent Data Communications Module
Quantity of Modules Per Base
Defined by CPU and base configuration
Diagnostics
LEDs, Network Monitoring Software (NetEdit3)
Communications
10BaseT Ethernet
Data Transfer
10 Million bits per second
Extension Port
RJ45
Link Good Indicator (LINKGD)
Green LED
Activity Indicator (ACT)
Red LED
Error Indicator (ERROR)
Red LED
Power Consumption
H2: 450mA; H4: 530mA (Supplied by base)
Operating Temperature
32° to 140° F (0° to 60° C)
Storage Temperature
--4° to 158° F (--20° to 70° C)
Relative Humidity
30% -- 95% RH (non-condensing)
Environmental Air
No corrosive gases permitted
Networking Protocols Supported
TCP/IP, IPX
Manufacturer
Host Automation Products
Link Distance
100 meters (328 feet)
Ethernet Communications Modules, 3rd Edition Rev. C, 03/11
General Specifications
A--3
Module Type
Intelligent Data Communications Module
Quantity of Modules Per Base
Defined by CPU and base configuration
Diagnostics
LEDs, Network Monitoring Software (NetEdit3)
Communications
10/100BaseT Ethernet
Data Transfer
100 Million bits per second
Extension Port
RJ45
Link Good Indicator (LINK)
Green LED
Activity Indicator (ACT)
Green LED
Error Indicator (ERR)
Red LED
100MB Transfer Rate (100M)
Green LED
Power Consumption
300mA (Supplied by DL05/06 base)
Operating Temperature
32° to 140° F (0° to 60° C)
Storage Temperature
--4° to 158° F (--20° to 70° C)
Relative Humidity
30% -- 95% RH (non-condensing)
Environmental Air
No corrosive gases permitted
Networking Protocols Supported
TCP/IP, IPX, MODBUS TCP, DHCP,
HTML Configuration
Manufacturer
Host Automation Products
Link Distance
100 meters (328 feet)
H2--ECOM100 / H4--ECOM100
Module Type
Intelligent Data Communications Module
Quantity of Modules Per Base
Defined by CPU and base configuration
Diagnostics
LEDs, Network Monitoring Software (NetEdit3)
Communications
10/100BaseT Ethernet
Data Transfer
100 Million bits per second
Extension Port
RJ45
Status Indicator (STATUS)
(H2--ECOM100 only)
Green LED
Link Good Indicator (LINKGD)
Green LED
Activity Indicator (ACTIVE)
Green LED
Error Indicator (ERROR)
Red LED
100MB Transfer Rate (100MBIT)
Green LED
Power Consumption
300mA (Supplied by DL base)
Operating Temperature
32° to 140° F (0° to 60° C)
Storage Temperature
--4° to 158° F (--20° to 70° C)
Relative Humidity
30% -- 95% RH (non-condensing)
Environmental Air
No corrosive gases permitted
Networking Protocols Supported
TCP/IP, IPX, MODBUS TCP, DHCP,
HTML Configuration
Manufacturer
Host Automation Products
Link Distance
100 meters (328 feet)
Ethernet Communications Modules, 3rd Edition Rev. C, 03/11
Appendix AA
Appendix
DL205 Memory Map
H0--ECOM100
A--4
General Specifications
Appendix A
H2--ECOM--F / H4--ECOM--F
Module Type
Intelligent Data Communications Module
Quantity of Modules Per Base
Defined by CPU and base configuration
Diagnostics
LEDs, Network Monitoring Software (NetEdit3)
Communications
10BaseFL Ethernet (fiber optic)
Data Transfer
10 Million bits per second
Extension Port
ST-style fiber optic connector
Link Good Indicator (LINKGD)
Green LED
Activity Indicator (ACT)
Red LED
Error Indicator (ERROR)
Red LED
Power Consumption
H2: 640mA; H4: 670mA (Supplied by base)
Operating Temperature
32° to 140° F (0° to 60° C)
Storage Temperature
--4° to 158° F (--20° to 70° C)
Relative Humidity
30% -- 95% RH (non-condensing)
Environmental Air
No corrosive gases permitted
Networking Protocols Supported
TCP/IP, IPX
Manufacturer
Host Automation Products
Link Distance
Up to 2,000 meters (2Km), 6,560ft (1.2 miles)
Ethernet Standards
Various institutes and committees have been involved in establishing Ethernet data
communication standards. These specification standards assure Ethernet network
compatibility for products from a broad variety of manufacturers.
The ECOM module complies with American National Standards Institute (ANSI)
and Institute of Electrical and Electronic Engineers standard ANSI/IEEE 802.3,
Carrier Sense Multiple Access with Collision Detection (CSMA/CD) Access
Methods and Physical Layer Specifications. This standard has been adopted by the
International Organization for Standardization (ISO) as document ISO/IEC 8802--3.
The Electronic Industries Association (EIA) and Telecommunications Industries
Commercial Building Telecommunications Wiring Standard designated
EIA/TIA--568A defines implementation of 10BaseT (twisted pair) and 10BaseF
(fiber optics) for Ethernet communications.
The same two organizations produced EIA/TIA TSB40--Additional Transmission
Specifications for Unshielded Twisted-Pair Connecting Hardware. The purpose of
this document is to specify transmission performance requirements and connecting
hardware requirements.
Ethernet Communications Modules, 3rd Edition Rev. C, 03/11
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