WEB TENSION TECHNOLOGY
BLH
LCt-104
HTU Web Tension
Transmitter
Operator’s Manual
TM056
RevD
2/12/15
Doc 35109
NOTICE
BLH Nobel makes no representation or warranties of any kind whatsover with
respects to the contents hereof and specifically disclaims any implied warranties or
merchantability or fitness for any particular purpose. BLH Nobel shall not be held
liable for errors contained herein or for incidental or consequential damages in
connection with the furnishing, performance, or use of this publication or its contents.
BLH Nobel reserves the right to revise this manual at any time and to make
changes in the contents hereof without obligation to notify any person of such
revision or changes.
Table of Contents
SECTION 1.
1.1
General Information..........................................................................................
SYSTEM DESCRIPTION ........................................................................................
1.1.1
Introducing the Plug-n-Web-it Concept .............................................................................. 1-1
1.1.2
The Safe-Weigh Software System ..................................................................................... 1-1
1.1.3
The LCt-104 Front Panel ................................................................................................... 1-2
1.1.4
Main Configuration Flow Diagram ...................................................................................... 1-4
1.1.5
Serial Communication ........................................................................................................ 1-4
1.2
OPTIONS ................................................................................................
1.2.1
Mounting Options ............................................................................................................... 1-4
1.2.2
Analog Output Options ....................................................................................................... 1-4
1.2.3
Allen-Bradley Remote I/O Network .................................................................................... 1-4
1.2.4
MODBUS RTU Protocol ..................................................................................................... 1-4
1.2.5
MODBUS RTU Protocol on UART board ........................................................................... 1-5
1.2.6
MODBUS Plus Protocol ..................................................................................................... 1-5
1.2.7
DeviceNet Protocol............................................................................................................. 1-5
1.2.8
PROFIBUS Protocol ........................................................................................................... 1-5
1.3
LCT-104 PERFORMANCE SPECIFICATIONS ...................................................................
1.4
LCT-104 ORDERING SPECIFICATIONS............................................................................
1.5
WARRANTY POLICY .......................................................................................
1.6
FIELD ENGINEERING ......................................................................................
SECTION 2.
2.1
2.2
System Installation ..........................................................................................
INTRODUCTION...........................................................................................
MOUNTING...............................................................................................
2.2.1
Display Console Mounting ................................................................................................. 2-1
2.2.2
Smart Junction Box Mounting ............................................................................................ 2-1
2.3
ELECTRICAL CONNECTIONS ...............................................................................
2.3.1
The LCt-104 Rear Panel .................................................................................................... 2-1
2.3.2
Module Interconnection ...................................................................................................... 2-1
2.3.3
Transducer Signal Inputs ................................................................................................... 2-3
2.3.4
Mains (AC) Power .............................................................................................................. 2-3
2.3.5
Serial Communication ........................................................................................................ 2-6
2.3.6
Analog Output (Option) ...................................................................................................... 2-6
2.3.7
Digital (Remote) Inputs....................................................................................................... 2-6
2.3.8 Open Collector Set point Outputs (Optional) ............................................................................. 2-7
2.3.8
Triac Set point Relay Outputs (Optional)............................................................................ 2-7
SECTION 3.
3.1
Calibration .................................................................................................
SYSTEM CALIBRATION (CALIBRAT) ..........................................................................
3.2
Setup SYSTEM PARAMETERS ...............................................................................
3.2.1
Number of HTU Load Cells ................................................................................................ 3-1
3.2.2
Display Units ...................................................................................................................... 3-1
3.2.3
Decimal Point Location ....................................................................................................... 3-1
3.2.4
Capacity ............................................................................................................................. 3-1
3.2.5
Front Panel Display Counts ................................................................................................ 3-1
3.3
3.4
KEYPAD CALIBRATION ....................................................................................
ENABLE MODE FUNCTION..................................................................................
3.4.1
CELL ENABLES DESCRIPTION ...................................................................................... 3-4
3.4.2
DEGRADE MODE ............................................................................................................. 3-5
3.4.3
SYMMETRICAL SYSTEM CHECK ................................................................................... 3-5
3.4.4
SYMMETRICAL SYSTEM CROSS CHECKING .............................................................. 3-5
3.5
COMPLEMENTING DATA ...................................................................................
3.5.1
Vertical inputs: Channels One and Three ......................................................................... 3-5
3.5.2
Horizontal Inputs: Channels Two and Four ....................................................................... 3-5
3.5.3 Hardware Correction of Vertical or Horizontal Inputs ................................................................ 3-5
SECTION 4.
4.1
Dynamic Digital Filter ........................................................................................
GENERAL ................................................................................................
4.1.1
Digital Averaging ................................................................................................................ 4-1
4.1.2
Band Selection ................................................................................................................... 4-1
4.1.3
Conversion Selection ......................................................................................................... 4-1
4.1.4
Filter Set-Up Procedures .................................................................................................... 4-1
SECTION 5.
5.1
Front Panel Display Functions..............................................................................
FRONT PANEL FUNCTIONS .................................................................................
5.1.1
Horizontal Bar Graph ......................................................................................................... 5-1
5.1.2
Vertical Bar Graph.............................................................................................................. 5-1
5.1.3
Alarm Status Annunciators ................................................................................................ 5-1
5.1.4
Configuring the L/R Key ..................................................................................................... 5-1
5.1.5
Configuring The ZERO Key ............................................................................................... 5-3
5.1.6
The F/T Key ....................................................................................................................... 5-3
SECTION 6.
Process Outputs ........................................................................................
6.1.1
Output Definition ................................................................................................................. 6-1
6.1.2
Set-Up Procedure ............................................................................................................... 6-1
6.2
6.2.1
SERIAL COMMUNICATION ......................................................................................
Transmit Only Output Formats ........................................................................................... 6-1
6.2.2
Full/Half Duplex Bi-Directional Interface ............................................................................ 6-4
6.3
SET POINT CONFIGURATION ...................................................................................
6.3.1
Main Set point Function and Selections ............................................................................. 6-4
6.3.2
Entering/Altering Main Set points ....................................................................................... 6-5
6.3.3
Dribble Set point Function and Selection ........................................................................... 6-5
SECTION 7.
System Diagnostics......................................................................................
7.1
OVERVIEW ...............................................................................................
7.2
DIAGNOSTIC USER ........................................................................................
7.3
DIAGNOSTIC VERSION.....................................................................................
7.4
7.5
ZERO RECALL ............................................................................................
SELECTING LIMITS ........................................................................................
7.5.1
Zero Limit ........................................................................................................................... 7-1
7.5.2
Overload Limit .................................................................................................................... 7-1
7.5.3
Motion Limit Selections ...................................................................................................... 7-1
7.8
7.9
7.10
7.6
FRONT PANEL KEY TEST ..................................................................................
7.7
CHECK REMOTE INPUTS ...................................................................................
TEST/VERIFY THE ANALOG OUTPUT .........................................................................
TEST/TROUBLESHOOT THE SERIAL OUTPUT .................................................................
TEST/TROUBLESHOOT THE OPTIONAL DEVICENET OR PROFIBUS OUTPUT ....................... 7-3
SECTION 8.
The LCt-104 Security System .................................................................................
8.1
INTRODUCTION...........................................................................................
8.1.1
Lock On/Off ........................................................................................................................ 8-1
8.1.2
Menu Locks ........................................................................................................................ 8-1
8.1.3
Key Locks ........................................................................................................................... 8-1
8.2
8.2.1
PASSWORD ACCESS ......................................................................................
Selecting/Storing a Password ............................................................................................ 8-1
8.3
Entering the Password ......................................................................................
SECTION 9.
9.1
9.2
9.4
9.5
9.7
9.8
GENERAL ................................................................................................
FORCE DISPLAY MODE ....................................................................................
9.3
9.6
Operation and Tension ...................................................................................
TENSION DISPLAY.............................................................................................
ANGLE DISPLAY ..............................................................................................
ZERO OPERATION.............................................................................................
INDIVIDUAL CHANNEL DISPLAYS ............................................................................
ERROR DETECTION AND CORRECTION ......................................................................
TENSION PARAMETER SELECTIONS AND OPERATION ................................................... 9-3
9.8.1
Web Units ........................................................................................................................... 9-3
9.8.2
Web Decimal Point Adjustment ......................................................................................... 9-3
9.8.3
P/inches or N/meters:......................................................................................................... 9-3
9.8.4
Wrap Angle ........................................................................................................................ 9-3
9.8.5
Auto Wrap - Maintain Constant Tension ........................................................................... 9-3
9.8.6
Angle Reference ................................................................................................................ 9-3
SECTION 10.
10.1
Allen-Bradley Remote I/O ................................................................................
INTERCONNECT CABLE.....................................................................................
10.2
10.3
10.4
RIO OVERVIEW ............................................................................................
THE ALLEN-BRADLEY PLC ..................................................................................
THE REMOTE l/O INTERFACE ................................................................................
10.4.1
Operational Overview ....................................................................................................... 10-1
10.4.2
Interface Configurations ................................................................................................... 10-2
10.4.3
Discrete Data Transfers ................................................................................................... 10-3
10.5
BLOCK DATA TRANSFERS ..................................................................................
10.5.1
Interface Basics ................................................................................................................ 10-5
10.5.2
A Perpetual Pointer .......................................................................................................... 10-6
10.5.3
Fault Evaluation ................................................................................................................ 10-6
10.5.4
Remote Filter Configuration ............................................................................................. 10-6
SECTION 11.
11.1
Modbus Protocols ..........................................................................................
MODBUS RTU PROTOCOL ..................................................................................
11.1.1
Common Data Format ..................................................................................................... 11-1
11.1.2
Modbus RTU Functions Supported ................................................................................. 11-1
11.1.3
Setup ................................................................................................................................ 11-1
11.2
MODBUS PLUS INTERFACE .................................................................................
11.2.1
Routing Path Addressing ................................................................................................. 11-3
11.2.2
Global Data Transfers ...................................................................................................... 11-3
11.2.3
Wiring and Node Addressing ........................................................................................... 11-3
11.2.4
Configuration .................................................................................................................... 11-3
11.2.5
Data Formatting ............................................................................................................... 11-3
11.2.6
Flashing LED Status ........................................................................................................ 11-4
11.2.7
Manipulating The Front Panel Display ............................................................................. 11-4
SECTION 12.
12.1
Profibus Protocol ...........................................................................................
THE INTERFACE DEFINED...................................................................................
12.1.1
Profibus DP ...................................................................................................................... 12-1
12.1.2
GSD Files (see paragraph 12.7) ...................................................................................... 12-1
12.2
12.3
12.3.1
INTERFACE WIRING ........................................................................................
LCt-104 MENU CHANGES ....................................................................................
IIO Menu Changes ........................................................................................................... 12-1
12.3.2
Diagnostic Menu Changes ............................................................................................... 12-3
12.3.3
Display Menu Changes .................................................................................................... 12-4
12.4
DATA EXCHANGE FORMATS.................................................................................
12.4.1
Produced Data (LCt-104 Transmission) ........................................................................... 12-4
12.4.2
Consumed Data (LCt-104 Receive) ................................................................................. 12-5
12.5
LED STATUS INDICATION ....................................................................................
12.5.1
LCt-104 Status ............................................................................................................... 12-11
12.5.2
Profibus Network Status ................................................................................................. 12-11
12.6
Profibus GSD FILE ...........................................................................................
SECTION 13.
13.1
DeviceNet Protocol .........................................................................................
THE INTERFACE DEFINED...................................................................................
13.1.1
General ODVA DeviceNet Description ............................................................................. 13-1
13.1.2
LCt-104 DeviceNet Interface Description ......................................................................... 13-1
13.2
13.3
INTERFACE WIRING ........................................................................................
LED STATUS INDICATION ...................................................................................
13.3.1
LCt-104 Status ........................................................................................................... 13-1
13.3.2
DeviceNet Network Status ......................................................................................... 13-1
13.4
LCt-104 MENU CHANGES ....................................................................................
13.4.1
I/O Menu Changes ..................................................................................................... 13-2
13.4.2
Diagnostic Menu Changes ............................................................................................... 13-2
13.4.3
Display Menu Changes .................................................................................................... 13-2
13.5
DATA EXCHANGE FORMATS.................................................................................
13.5.1
Produced Data (LCt-104 Transmission) .......................................................................... 13-4
13.5.2
Consumed Data (LCt-104 Receive) ................................................................................ 13-5
13.6
DeviceNet EDS FILE..........................................................................................
Trademark Usage Acknowledgments
Allen-Bradley is a trademark of Allen-Bradley Company, Inc.
PLC and PLC-5 are trademarks of Allen-Bradley Company, Inc.
Modbus is a trademark of Schneider Automation.
DeviceNet is a trademark of ODVA
SECTION 1.
1.1
General Information
SYSTEM DESCRIPTION
The LCt-104 system’s patented synchronous
digital measurement of multi-cell systems
establishes the new benchmark in web tension
technology. Systems individually digitize each
HTU transducer’(s) signals and display the
resultant force, tension, or angle data, live on the
console display. Measuring each individual HTU
load cell provides greater system resolution and
accuracy.
access for load cell connection while maintaining
NEMA integrity.
Console Display Modules are housed in an
aluminum case with a powder coated aluminum
panel mounting bezel. NEMA 4/4X wall mount
enclosures are available as options. Simple
entry of calibration data, and filter selections is
accomplished using the front panel keypad. All
electrical connections are made at the rear
panel with unpluggable screw terminal connectors.
The LCt-104 ‘Expert Technology’ process web
tension system (Figure 1-1) consists of two
modules designed to convert the mV/V signal
from strain gage type force transducers (load
cells) into a high resolution digital signal
representing force or tension. HTU load cells
connect directly to the smart junction box
located in the immediate vicinity of the web
tension machinery being used. Resultant
force/tension/angle signals are communicated
from the smart junction box directly to the
console display module located up to 200 to
20001 feet away. Console units operate at either
115 or 230 VAC and provide regulated, fault
protected 10 VDC excitation for HTU strain gage
transducers. Standard features include an RS422/485 serial port with PC interface or simplex
output ASCII, a sigma delta type A/D converter
for each transducer, and dynamic digital filtering.
Options include up to four high-resolution analog
outputs, eight programmable set points,
Profibus, DeviceNet, Allen-Bradley Remote I/O,
and Modbus Plus, Modbus RTU Protocol,
communication and serial ACSII digital
communication interfaces.
1.1.1 Introducing the Plug-n-Web-it
Concept
The Smart Junction Box enclosure is
constructed entirely of stainless steel and rated
NEMA 4X. Available cable glands provide
1.1.2 The Safe-Weigh Software
System
1
J-box jumper required for distances greater
than 200 ft.
1-1
The BLH Plug-n-Web-it concept takes
advantage of technology to minimize start-up
time and the operator learning curve. Intuitive
configuration menus, self configuration of many
set-up parameters, and simple pushbutton type
digital calibration combine together to make the
LCt-104 one of the easiest process instruments
to configure and operate.
Figure 1-1. Both Modules of the LCt-104
System
Safe-Weigh software system benefits include
ExpertSystem, Dynamic Digital Filtering, and a
wide range of proven DCS/PLC connectivity
options. Expert System Diagnostics provides online preventative maintenance information that
quickly identifies electrical and/or mechanical
problems. Dynamic Digital Filtering ensures
precise, repeatable set point control in ‘noisy’
web environments. Proven connectivity with AllenBradley, Modicon (AEG Schneider) General
Electric, Johnson Yokogawa, Honeywell, and
other PLC/DCSdevices eliminates the risks
associated with digital integration of data
information into the process control environment.
data and status while in the operate mode and
provides instructions etc. during the configuration
mode.
1.1.3 The LCt-104 Front Panel
All configuration, calibration, and operation
transactions are performed using the front panel
push buttons and the high intensity vacuum
fluorescent display (Figure 1-2). The user-friendly
design separates the operating push buttons
(Force/Tension, Zero, L/R, andPrint) from the
configuration menu keypad. The two line
alphanumeric display indicates Force or Tension
1-2
Figure 1-2. The LCt-104 Console Front
Panel.
Figure 1-3. The LCt-104 Main Flow Diagram
1-3
1.1.4 Main Configuration Flow
Diagram
LCt-104 configuration is performed using the
menu driven keypad on the right side of the front
panel and follows the flow diagram presented in
Figure 1-3. This diagram shows the overall
structure and general guidelines of LCt-104 setup, calibration, filter, display, I/O, diagnostic, and
security configuration routines. Detailed
explanations of sub menu parameter selections
are provided in sequential chapters, starting with
Section III.
To browse through the menus, press MENU and
use thearrow keys to move across menu
subjects, or up and down within a menu.
Parameters are not actually changed until the
edit and enter keys are used.
1.1.5 Serial Communication
enclosure is available (Console Display). For Div.
2 hazardous locations, units areavailable with CSA
approval as non-incendive devices.
1.2.2 Analog Output Options
Systems are available with a 16 bit analog output
with industry standard 4-20 mA operation. Setup and calibration of this output is accomplished
using the menu keypad and can be configured to
track force or tension data. Loop diagnostics are
also provided to verify that the ana- log connection
is intact. See Section II for wiring information and
Section VI for configuration details.
NOTE: Four analog outputs are available for
trackingforce and tension data simultaneously
(paragraph 1.2.7).
1.2.3 Allen-Bradley Remote I/O
Network
Standard LCt-104s are equipped with a single
serial communication port that can be selected
to operate as an RS-422 full duplex, or RS-485
half-duplex port. The type selection is made
using a series of DIP switches, Console Display,
rear panel. Protocol selection is made within the
keypad menu structure. Standard units ship with
ASCII protocol for communication with a printer,
PC, remote display, or data logger. This port can
be selected for continuous or demand operation.
Extensive diagnostics verify transmit and
receive, proper parity and framing, and a
visualization function allows the user to view the
actual serial transmit and receive characters. See
Section II forwiring information and Section VI for
protocol information.
The Allen-Bradley Remote I/O interface is a
communication link that supports remote, time
critical I/O control communications between a
master processor anda remote I/O slave. It is
typically used to transfer I/Obit images between
the master and slave. Each LCt104 system
represents a quarter (1/4) Rack of discreteI/O with
32 bits of input and output image files to the
scanning PLC. All data and status information
uses discrete reads and writes to communicate
scale information to the PLC in the shortest time
possible. Blockdata transfers are used to
communicate non-time critical diagnostic and
calibration data, and remotely configure web
feature limits and digital filter parameters.
1.2 OPTIONS
MODBUS is often recognized as an industry
standardmethod of digital communication protocol
between amaster or host computer and a slave
device. This protocol was originally developed by
Modicon to communicate discrete and analog
information between a PLCand a master host. As
implemented in the LCt-104,this protocol
efficiently communicates force and diagnostics
information to a MODBUS Master Driver
equipped host.
LCt-104 units are available with several different
application enhancement options. Options include
various mounting enclosures, analog output
selections, and customnetwork
interfaces/protocols. All options will be fully defined later in this manual.
1.2.1 Mounting Options
For units located in a general factory/plant floor, or if
corrosive, hose down, or sanitary requirements
are a factor,a NEMA 4X stainless steel
1-4
1.2.4 MODBUS RTU Protocol
1.2.5 MODBUS RTU Protocol on
UART board
Same as implemented above RTU but on a
separate board freeing up communications on
serial port to drive a printer or remote display, or
for communications forthe PC interface mode.
Also supplies a RS232 connection.
1.2.6 MODBUS Plus Protocol
MODBUS Plus protocol allows the LCt-104
systems to communicate on a peer-to-peer
network link with Modicon 984 and Quantum PLC
devices.
1.3 LCT-104
1.2.7 DeviceNet Protocol
DeviceNet is a low cost industrial network
designed to easily connect up to 64 "cell" type
devices to a PLC/ PC. Information in this Section
XIII defines the LCt-104 DeviceNet register
allocations and interface instructions.
1.2.8 PROFIBUS Protocol
Profibus is a Siemens industrial network
designed to easily connect up to 127 "cell" type
devices to a PLC/ PC. Information in the Profibus
defines the LCt-104 Profibus register allocations
and interface instructions.
PERFORMANCESPECIFICATIONS
Performance
Internal Resolution
Max. Display Resolution
Max. Res. Per Channel
Conversion Speed
Sensitivity (Noise)
Full Scale Range
Dead Load Range
Input Impedance
Load Cell Excitation
Remote Sense
Linearity
Calibration Repeatability
4,194,304 total counts
3,000,000 total counts
1,000,000 counts
selectable 7.5, 15, 30, and 60 conversions per second
0.001 1% full scale (max +/-16 counts w/o filter)
+/-35 mV/channel
100%
10 M-ohms, min. per channel
10 V (65 mA/channel max)
user configurable, each channel
+/-0.0015% of full scale
0.3 μV per count
Temperature Coefficient
Span/Zero
+/-2ppm/°C
Environment
Operating Temperature
Storage Temperature
Humidity
Voltage (Console)
(Jbox)
Power
Display/Operator Interface
Type
Active Digits
Approval
1-5
-10 to 55°C (12 to 131°F)
-20 to 85°C (-4 to 185°F)
5 to 90% rh, non-condensing
17/230 +/-15% 50/60 Hz
16 VDC
12 watts max
high intensity cobalt green
vacuum fluorescent
7 digit alpha numeric.59" high for weight:
8 digit alphanumeric .39"
CSA
Isolated Analog Output
Type
DC Set point Outputs - 8 (Optional)
Type
Operating Voltage
ON Voltage
C22.2 (Class l, lI,III; Div.2; Groups A-G)
16 bit digital to analog
Current 4-20 mA (600 ohm max load)
OFF State Leakage
Power
open collector (current sinking)
5 - 35 VDC
1.2 VDC @ 40 mA
0.8 VDC @ 1 mA
0.04 μA @ 40 VDC
external supply required
AC Set point Outputs - 8 (Optional)
Type
Operating Voltage
AC Frequency
ON State Voltage Drop 1.2
Min - Max Load Current
Leakage Current
Power
triac
12 - 240 VAC
20 - 500 Hz
Vrms
5mA - 1A
1mA @ full rated load voltage
external supply required
Digital Inputs
Logic’0' (Low)
Logic’1' (High)
Mechanical Relay’0'
Mechanical Relay’1'
less than 0.5VDC, sink 3mA (min)
10 to 28 VDC (TTL open collector)
closed (one side = digital
common, the other side = input)
open (input internally pulled up)
Network Serial Communication (Std)
Type
Baud
RS-485 Half Duplex (Multi-Drop)
9.6K, 28.8K’ and 56.7k
Simplex Data Output (Standard)
Type
Baud
Data Format (Selectable) ASCII
RS-485 (Simplex)
1200 or 9600
7 data bits, even parity, stop bit
Terminal/Computer Interface (Optional)
Interface Type
Baud
Protocol
ASCII
RS-485 half duplex (standard)
1200 or 9600
duplex command/response format
7 data bits, even parity, stop bit
Special Protocols (Optional)
Modbus
RTU Protocol
Special Interface (Optional)
Allen Bradley Remote l/O -
1/4 logical rack
1-6
Modbus Plus
DeviceNet
Profibus
peer-to-peer (with global data)
ODVA specified
Siemens protocol
1.4 LCT-104 ORDERING SPECIFICATIONS
Designator
[M] Mounting
Option
Numbers
Option Definition
NEMA 4X Panel Mount
NEMA 4X Stainless Steel Wall Mount Enclosure
None (nothing installed)
Uart Card (R76)
[A]
Expansion Slot A
Modbus Plus
Allen-Bradley Remote I/O
Profibus
ODVA DeviceNet
[P]
Process Outputs
Remote Inputs (standard)
#1 with Analog Output
#1 with (4) Individual Analog Outputs
[C] Communication
RS-485, RS-422, or Multi-Drop RS-422 with PCInterface - ASCII
Print Format
#1 with Modbus RTU Protocol
[B]
Expansion Slot B
None (standard)
8 Open Collector DC Outputs
8 Solid State Relay Outputs
[M] Cable
Standard Length Cable - 200 ft
Special Length Cable Over 200 ft
Interconnecting cable part number is 149971-8. Specify length when ordering.
1-7
1.5 WARRANTY POLICY
BLH warrants the products covered hereby to be
free from defects in material and workmanship.
BLH’s liability under this guarantee shall be limited
to repairing or furnishing parts to replace, f.o.b.
point of manufacture, any parts which, within three
(3) years from date of shipment of said product(s)
from BLH’s plant, fail because of defective
workmanship or material performed or furnished
by BLH. As a condition hereof, such defects must
be brought to BLH’s attention for verification when
first discovered, and the material or parts alleged
to be defective shall be returned to BLH if
requested. BLH shall not be liable for
transportation or installation charges, for expenses
of Buyer for repairs or replacements or for any
damages from delay or loss of use for other
indirect or consequential damages of any kind.
BLH may use improved designs of the parts to be
replaced. This guarantee shall not apply to any
material which shall have been repaired or altered
outside of BLH’s plant in any way, so as in BLH’s
judgment, to affect its strength, performance, or
reliability, or to any defect due in any part to
misuse, negligence, accident or any cause other
than normal and reasonable use, nor shall it apply
beyond their normal span of life to any materials
whose normal span of life is shorter than the
applicable period stated herein.
1-8
In consideration of the forgoing guarantees, all
implied warranties are waived by the Buyer, BLH
does not guarantee quality of material or parts
specified or furnished by Buyer, or by other parties
designated by buyer, if not manufactured by BLH.
If any modifications or repairs are made to this
equipment without prior factory approval, the
above warranty can become null and void.
1.6 FIELD ENGINEERING
Authorized BLH Field Service Engineers are
available around the world to install LCt-104 based
web tension measurement systems and/or train
factory personnel to do so. The field service
department at BLH is the most important tool to
assure the best performance from your application.
Field service phonenumbers are listed below.
Factory: (Main Number)
(781) 298-2000
Canada: (416) 251-2554 or
(800) 567-6098
System Installation
SECTION 2.
2.1 INTRODUCTION
This chapter provides LCt-104 system mounting
and electrical installation information.
Instruments will operate accurately (to
specification) in locations with temperatures
ranging from -10°C to +55°C (+14°F to + 130°F).
The installation location should be free of
vibration. Unless equipped with the proper
enclosure option, instruments should not be
located in areas containing explosive or
corrosive vapors. In all installations, ac (mains)
power should be supplied from a clean (transient
free) instrument power source.
2.2 MOUNTING
2.2.1 Display Console Mounting
The LCt-104 Display Console is shipped with the
necessary hardware for panel mounting. Outline
and panel cutout dimensions are depicted in Figure
2-1. Installation of panel mount adapters is shown
in Figure 2-2. Display Console units can be
located up to 200 feet from the junction box.
2.2.2 Smart Junction Box Mounting
Locate the NEMA 4X junction box centrally,
within cable reach of the HTU load cells, to ensure
maximum system performance. Figure 2-3 shows
the j-box outline dimensions and mounting hole
designations. Four pre-punched holes enable wall
or bracket mounting in theimmediate load cell
vicinity.
2.3 ELECTRICAL CONNECTIONS
2.3.1 The LCt-104 Rear Panel
Figure 2-4 (page 2-3) shows the LCt-104
Display Console rear panel where most
connections are made.
2.3.2 Module Interconnection
Connect the Smart Junction Box to the Display
Console Module using the four lead cable
supplied by BLH. Carefully connect this cable to
both modules as designated in Figure 2-5. Be
certain to connect the cable shield to the
SHIELD terminal on BOTH modules. Cable
length will be determined per sales order
instructions.
Figure 2-1. LCt-104 Display Console Outline Dimensions
2-1
2-2
HTU
Channel
Wire
Figure 2-4. Display Console Rear Panel Electrical Connections - Remote I/O Option Shown
Figure 2-5. Display Console to Smart Junction Box Interconnect Wiring Diagram
2.3.3 Transducer Signal Inputs
Transducer (load Cell) input leads from HTU’s
are wired directly to the junction box circuit
board as shown in Figure 2-6. HTU load cells
and junction box cables are shipped with prestripped, tinned leads so that leads need only be
inserted in the proper terminal location and the
screw above tightened securely. Lead
designations are clearly labeled for standard
BLH color coded load cell cables.
2-3
2.3.4 Mains (AC) Power
LCt-104 instruments are shipped ready to
connect to115 VAC (50 or 60 Hz) as shown in
Figure 2-7. If requested, units will be factory
configured for 220-VAC operation, otherwise,
remove the rear panel and change the internal
voltage selection switch as shown in Figure2-8.
Each instrument is protected with a 1/4 amp,
250 volt‘T’ type fuse located adjacent to the ac
power socket.If the fuse opens, replace it with
the same type, current, and voltage rating.
SHIELD
Channel 4
Horizontal Cell 2
+EXC
+SEN
+SIG
Blue
-SIG
Orange
-SEN
-EXC
SHIELD
+EXC
Channel 3 Vertical
+SEN
Cell 2
+SIG
Green
Orange
White
-SIG
Red
-SEN
Blue
-EXC
Black
SHIELD
Channel 2
Horizontal Cell 1
+EXC
+SEN
+SIG
Blue
-SIG
Orange
-SEN
-EXC
SHIELD
+EXC
+SEN
Channel 1 Vertical
Cell 1
+SIG
2-4
White
-SIG
Red
-SEN
Blue
-EXC
Black
Figure 2-6. Load Cell Connection Designations
Figure 2-7. Ac ‘Mains’ Power Connection
Green
Orange
5
2.3.7 Digital (Remote) Inputs
Figure 2-8. Ac Power Selection Switch
2.3.5 Serial Communication
A 4-socket mating half connector is provided for
serialcommunication wiring. Connect wires for
either RS-485 or RS-422 operation as shown in
Figure 2-9. Note that connector position 5 is a
ground terminal and should be used for three-wire,
RS-485 communication networks. Set DIP switch
S1 positions 1-4 for desired interface function (Figure
2-9 lower section). See Section VI for details
concerning serial interfacing.
Figure 2-9. The Serial Communication
Interface
2.3.6 Analog Output (Option)
Analog current output is optional on LCt-104 instruments. Units are factory prepared for either 0-24 or
4- 20 mA operation, depending upon sales order
instruction. Use the two-socket mating half terminal
connector to attach plus and minus signal wires as
shown in Figure 2-10. Route wires away from ac
power lines and other EMI sources to prevent
interference. Section VI provides analog output
configuration procedures.
2-6
Figure 2-10. Analog Output Configuration
Certain front panel key functions can be initiated remotely using the rear panel digital inputs. Figure 211 gives wiring designations for remote operation of
the ZERO, Left/Right (L/R), Force/Tension (F/T),
and PRINT keys. Interconnecting wire/cable length
should not exceed 50 feet. Route wires/cable away
from ac power lines and other EMI sources to
prevent interference.
Figure 2-12. Open Collector Relay Wiring
2.3.8 Triac Set point Relay Outputs
(Optional)
When installed, optional solid state triac
outputs operate at 12 to 240 VAC and handle
loads of 50 mA to 1 amp. Operationally, they
are identical to the open collector set point
outputs defined in paragraph 2.3.7. Wire
outputs in accordance with Figure 2-13.
Figure 2-11. Remote Input Switch
Configuration
2.3.8 llector Set point Outputs
(Optional)
Units with eight open collector type set point outputs
(optional) can be configured for main or dribble
operation with inflight compensation (see
Section VI). Outputs are open collector type,
capable of sinking 35 mA at 1.2 VDC. Wire set point
outputs as shown in Figure 2-12.
Figure 2-13. Triac Relay Wiring
Arrangements
2-7
SECTION 3.
Calibration
System calibration consists of three features;
system calibration (CALIBRAT), Cell Enable
(OFF/ON), andCompliment Cell Data. To begin
with parameter entries, press the MENU key until
CAL MENU is displayed. Press the ‘down’ arrow
key for a display of CAL CALIBRAT.
3.1 SYSTEM CALIBRATION
(CALIBRAT)
After installation, setup and calibration are the
next steps in preparing an LCt-104 system for
operation (see main menu diagram, Figure 1-3).
Setup and calibration parameters are established
easily using the front panel display and eight
configuration keys. Figure 3-1 (page 3-2)
presents details for setup parameter entry and
Figure 3-2 (page 3-3) shows procedures for LCt104 keypad calibration.
3.2 Setup SYSTEM PARAMETERS
Setup establishes system operating parameters
suchas system capacity, decimal point location,
displayunits, count by, etc. Follow the flow diagram
presentedin Figure 3-1 to enter or alter setup
parameters.
3.2.1 Number of HTU Load Cells
The first parameter entry requests the number of
system load cells. Simply enter the number of
HTU system cells (1 or 2). This value defines the
system for the LCt-104 and will affect subsequent
parameter entries as well as system performance.
3.2.2 Display Units
Designate the desired display units as pounds
(LB) or Newtons (NT). Selection also appears on
print outs and other serial communication
transactions.
3.2.3 Decimal Point Location
Position the decimal point as desired for
tension/forcedisplay and serial communication.
3.2.4 Capacity
Enter the HTU load cell capacity value.
3-1
NOTE: Even if the system uses two HTU load
cells enter only the value of a single cell, not the
combination of both.
3.2.5 Front Panel Display Counts
Define the count value of each display increment
by selecting 1, 2, 5, 10, 20, 50, or 100 (note that
decimal selection still applies). Note that before
the count value is selected, the LCt-104 will
automatically attempt toachieve the best possible
resolution.
3.3 KEYPAD CALIBRATION
LCt-104 system calibration is extremely simple.
Entryparameters are located on the label of each
cell and on the accompanying Calibration Certificate
sheet (Figure3-3).
LCt-104 instruments are factory calibrated with a
very precise mV/V measurement device. The
keypad calibration method establishes a
relationship between force and mV/V, resulting in
an extremely accurate electrical type of
calibration. Keypad calibration requires a
calibration sheet (Figure 3-3, page 3-4, or side of
physical cell) for each HTU load cell. The cal.
sheet presents the load cell mV/V output reading
for both vertical (Z) and horizontal (X) values.
Sheets also include a zero balance (no load)
mV/V reading. Keypad calibration allows for the
entry of zero balance and a single span point. On
dual-cell systems (typical), zero balance and span
points must be entered for both bridges, vertical
and horizontal, of EACH cell. Thus a typical HTU
calibration requires four passes through the cal
‘loop’ (see Figure 3-2).
3-2
Change values to
fraction
Figure 3-2.
Calibration
Methods and
Procedures
3-3
Figure 3-3. Sample HTU Load Cell Calibration Certificate
3.4 ENABLE MODE FUNCTION
3.4.1 CELL ENABLES
DESCRIPTION
During normal HTU system operation, all
enables should be on; this means that the HTU
system is fully operational.
3-4
There are two enables for each HTU cell (vertical
and horizontal), four for two HTU’s as follows:
Cell #1 - on the display console, is the off/on
enable for the vertical input from the first HTU.
Cell #2 - on the display console, is the off/on
enable for the horizontal input from the first HTU.
Cell #3 - on the display console, is the off/on
enable for the vertical input from the second
HTU.
Cell #4 - on the display console, is the off/on
enable for the horizontal input from the second
HTU.
3.4.2 DEGRADE MODE
In degrade mode, shutting off the enables of a
defective HTU cell allows continued operation
until the cell can be replaced. This only applies to
a two cell (left right measurement system. In a
single cell system, the faulty cell must be
replaced.
Degrade mode decreases the force
measurement by approx. 50% but allows system
operation until the (faulty cell) swap is made and all
enables are turned back on.
3.4.3 SYMMETRICAL SYSTEM
CHECK
Enables can be used to quickly isolate a problem
on one side of web. The system operator simply
turns off the enables for a single cell to see if one
side has more mechanical or electrical noise that
the opposing side. In a symmetrical system each
side should be showing the same force and
angle measurement so with ability to turn either
side on/off will reveal differences immediately.
3.4.4 SYMMETRICAL SYSTEM
CROSS CHECKING
A two sided system (with two HTU’s) works
symmetrically. This allows system cross
checking to be applied in order to achieve a
model or profile of system performance, if
desired.
This profile combines a vertical component of
one HTU with the horizontal component of the
other HTU (system will run at Vs. the force) and
shows the resultant of the two opposite HTU’s
acting as one HTU. This model can be used
anytime to check for mechanical or electrical noise
problems during system operation.
3-5
3.5 COMPLEMENTING DATA
Complemented data routines are used for setting
up correct polarity on vertical and horizontal
channels and is only used to correct for resultant
signals generated by web tension applied to the
tension roll.
See Figure 3.4 and 3.5 for convention
3.5.1 Vertical inputs: Channels One
and Three
Vertical channel can produce positive signals,
indicating that force is being applied in a
downward direction on both (or a single HTU
transducer) causing positive mV/V signal(s)
display(s). Or an upward force can be applied
resulting in a negative force causing negative
mV/V signal(s) display(s). In either case, signals
are always in phase with each other and bipolar
feature will allow calibration mode to zero out
the roll weight . See Figure 3.3 for convention
3.5.2 Horizontal Inputs: Channels
Two and Four
Horizontal components are sometimes out of
phase because layout of application of HTU’(s).
For this reason channel 4 automatically
reverses the polarity of the incoming signal due
to web tension applied to the roll. Calibration
mode will again zero out any polarity due to roll
weight. See Figure 3.3 for convention
3.5.3 Hardware Correction of Vertical
or Horizontal Inputs:
Wiring should be consistent with standard wiring
shown on page 2-4 Figure 2-6.
Complementing data allows system wiring to
remain consistent with manual designated
instructions (no swapping signal (+,-) wiring).
HTU Polarity Convention
FrV neg sig
FrH neg sig
FrH pos sig
FrV pos sig
Lct104 Display mv/V Signals due to Roll weight
C
D
B
ROLL
A
HTU Location
Vertical CHNL 1
Horizontal CHNL 2
Vertical CHNL 3
Horizontal CHNL 4
A
+
?
+
?
B
+
C
?
?
D
+
-
Figure 3.3
Note : Display readings are sequentially selected by pressing the mv/V button on the keypad.
For channel 4 (only) readings are inverted from actual signal polarity. Use this chart relative to
your HTU and Roll orientation . Compare Display signals with chart for validation.
3-6
The following charts establish polarity of resultant mv/V signal change due to geometrical wrap
in web path tension relative to HTU orientation. V = vertical H = horizontal signals
The objective for using the compliment parameter is to establish positive force readings on the
display of the Lct104 for these signal changes.
Select the HTU orientation A,B,C, or D and the geometrical wrap (1-8), that relates to your
installation for the associated complement parameter from charts 3.4 and 3.5.
1
4
8
5
7
6
2
3
A
B
D
C
HTU A Comp. HTU B
Comp.
HTU C
CH1 CH2
CH1
CH2
Fr V H
Fr V H
Fr V
OFF
OFF
OFF
ON
1 P 0
1 0 N
1 N
OFF
ON
ON
OFF
2 0 N
2 N 0
2 0
ON
OFF
OFF
ON
3 N 0
3 0 P
3 P
OFF
OFF
OFF
OFF
4 0 P
4 P 0
4 0
OFF
ON
ON
ON
5 P N
5 N N
5 N
ON
ON
ON
OFF
6 N N
6 N P
6 P
ON
OFF
OFF
OFF
7 N P
7 P P
7 P
OFF
OFF
OFF
ON
8 P P
8 P N
8 N
Comp.
H
0
P
0
N
P
P
N
N
CH1
CH2
ON
OFF
OFF
OFF
OFF
OFF
OFF
ON
ON
OFF
OFF
OFF
OFF
ON
ON
ON
HTU D
Comp.
Fr V H CH1 CH2
1 0 P OFF OFF
2 P 0 OFF OFF
3 0 N OFF ON
4 N 0 ON OFF
5 P P OFF OFF
6 P N OFF ON
7 N N ON ON
8 N P ON OFF
Figure 3.4 Channels 1 & 2
3-7
Note: Comp.= complement, P=positive, N=negative, 0=no change in signal
due to the absence of resultant force in that direction.
1
4
8
5
7
6
2
3
A
B
D
C
HTU A Comp. HTU B
Comp.
HTU C
Fr V H CH3 CH4 Fr V H CH3 CH4 Fr V
1 P 0 OFF OFF 1 0 N OFF OFF 1 N
2 0 N OFF OFF 2 N 0 ON OFF 2 0
3 N 0 ON OFF 3 0 P OFF OFF 3 P
4 0 P OFF ON 4 P 0 OFF OFF 4 0
5 P N OFF OFF 5 N N ON OFF 5 N
6 N N ON OFF 6 N P ON ON 6 P
7 N P ON ON 7 P P OFF ON 7 P
8 P P OFF ON 8 P N OFF OFF 8 N
Comp.
H
0
P
0
N
P
P
N
N
Figure 3.5 Channel 3 & 4
3-8
CH3
CH4
ON
OFF
OFF
ON
OFF
OFF
OFF
OFF
ON
ON
OFF
ON
OFF
OFF
ON
OFF
HTU D
Comp.
Fr V H CH3 CH4
1 0 P OFF ON
2 P 0 OFF OFF
3 0 N OFF OFF
4 N 0 ON OFF
5 P P OFF ON
6 P N OFF OFF
7 N N ON OFF
8 N P ON ON
SECTION 4.
Dynamic Digital Filter
4.1 GENERAL
The LCt-104 uses a two stage digital filter. Each
stage requires parameter entries as shown in
Figure 4-1 (next page). Also required is selection
for the conversion speed of the analog to digital
signal which will affect filter length time
(response). Make parameter entries while viewing
live tension force changes on the front panel
display. This unique feature allows editing of parameters to ‘fine tune’ precision settings.
BAND setting is higher than necessary, sensitivity
to small tension changes will be reduced.
4.1.3 Conversion Selection
Conversion speed selection plays a role in
filtering. If the conversion speed is decreased, the
length of the filter response time will be longer.
When adjusting filter parameters, try a slower
conversion speeds first since they usually
generate less noise. If, however, the response
time is not appropriate then increase the
conversion rate and repeat filter procedure.
4.1.1 Digital Averaging
The filter first stage calculates a running average
of tension input readings. Available selections are
OFF, and 1 - 12 (see Figure 4-1). With averaging
OFF the response time will be maximum and
noise reduction will be least. With higher settings,
response time increases and noise levels are
diminished.
Using a `first in - first out' algorithm, running
averaging provides display updates every A/D
cycle regardless of the number of readings
averaged. However, since each conversion
averaged adds one more A/D cycle to the filter
length, the larger the averaging selection, the
longer the filter length becomes.
4.1.2 Band Selection
The second stage of the filter, BAND, is applied
after averaging is selected. A BAND value
between 0 and 100 must be entered as shown in
Figure 4-1. Dynamic Digital Filtering constantly
compares the amount of input signal change
between consecutive conversions. If the
differences for all cells fall within the BAND
setting, a mathematical filter attenuates the
conversion to conversion variation. Once the
difference for any cell (between conversions)
exceeds the BAND selection, the BAND filter is
canceled and the display tracks live tension with
maximum response. To achieve the best overall
filter response, keep the BAND selection as low as
possible without hindering system performance
(see next paragraph for set-up instructions). If the
4-1
4.1.4 Filter Set-Up Procedures
Setting filter parameters requires a balance
between achieving maximum noise reduction and
maintaining quick response and good sensitivity to
real tension changes. The goal of filter set-up is to
use the lowest averaging and BAND selections
needed for smooth system display/operation. If
selections are higher than necessary, accurate
detection of small tension changes may be
hindered. Using the six steps presented below,
tune the system to its maximum performance
level.
1. Begin with the BAND set at a low
value (approx. 4-10).
2. Increase averaging until the noise (watch
display) is reduced to the least significant
digit (approx. +/- 10 divisions).
3. Increase BAND, if necessary, to
reduce the remaining noise to the desired
level.
4. If increasing the BAND value does not
reduce the noise, return to averaging and
select the next higher setting, then
repeat step three.
5. If the BAND value required to quiet the
display becomes large (65-100), it may be
better to use more averaging. Try to
achieve the best balance between BAND
(small tension change sensitivity
reduction) and averaging (longer response
time).
6. If a stable tension display cannot be
achieved with reasonable selections, it
may be necessary to change the
instrument set-up to reducesensitivity, or
select a different conversion rate.
Figure 4-1. Filter Parameter Selections
4-2
SECTION 5.
Front Panel Display Functions
5.1 FRONT PANEL FUNCTIONS
The front panel display of the LCt-104 (Figure 5-1) includes a two line alpha numeric digital display for tension and status information as well as horizontal and
vertical bar graphs and diagnostic alarm
annunciators. The bar graphs and alarm annunciators
can be used for several different functions as defined
in the following paragraphs. Use the display menu
flow diagram (Figure 5-2) to configure the front panel
functions for desired system operation.
starting and ending tension values. Note that this indicator also can be configured for reverse polarity depending upon the starting and ending values.
5.1.3 Alarm Status Annunciators
Eight front panel alarm/status annunciators provide
ongoing system diagnostic information. Each
annunciator can be configured to represent 1 of 11
conditions; OFF (no function), system in motion, zero
limit exceeded, overload limit exceeded, serial
communication receive, serial communication transmit,
serial communication parity error, serial framing
5.1.1 Horizontal Bar Graph
The horizontal bar graph is considered the primary
level indicator and is typically used to monitor
horizontal web balance. vacuum fluorescent
segments located under the 0 to 100% bar graph
give instant visual reference to “pulling” effects.
Select ON to use; OFF for no function. Choose force,
tension, or percent tracking and then enter the starting
and ending tension values.Note that this indicator also
can be configured for reverse polarity depending upon
the starting and endingvalues.
5.1.2 Vertical Bar Graph
The vertical bar graph indicates vertical tension balance. Located to the right of the tension display area,
this indicator provides a graphical representation of 0
to 100% in 10% increments (each arrow = 10% capacity). Select ON to use; OFF for no function. Choose
force, tension, or percent tracking and then enter the
error, analog output fault, analog output over high
selection, analog output under low selection, AllenBradley Remote I/O, DeviceNet, Profibus, or Modbus
Plus status. Once configured as A1-A8, vacuum
fluorescent segments will be illuminated when
configured condition is true. Configure each
annunciator consecutively as shown in Figure 5-2.
5.1.4 Configuring the L/R Key
The L/R side key is used when two HTU’s are used.
Pressing this key when Force or angle is displayed
will show the forces or angles for each side. This key
shouldbe used to view the right or left side of the web
roll.The typical association is left HTU = Channel #1
and#2 and right HTU = tChannel #3 and #4. Of
course, or left can depend on position of operator, so
it isgood to setup the Web roll for correct observation
byuser.
right
Figure 5-1. LCt-104 Front Panel Functions
5-1
Figure 5-2. LCt-104 Front Panel Function Configuration Menu
5-2
When L/R is pressed, selection of A or B blinking will
be displayed for left or right reading.
Trueweight values for each input are displayed by
continued pressing of the INDV key.
The reference angle is shown only if the auto wrap
feature is turned on. Acquiring a new angle can be
perform by pressing the EDIT key, as soon as this
is done new reference will be displayed.
5.1.6 The F/T Key
NOTE: There is no side display for tension; total tension is the only displayed value, if auto wrap is on.
5.1.5 Configuring The ZERO Key
The zero key allows the canceling of roll weight associated with vertical and horizontal inputs. When zero
is pressed, the dead weight of each input is
subtractedand the displayed data reads zero Ib/nt.
The true weight reading, associated with each
channel (without crosstalk applied), can be viewed by
pressing the INDV key and then pressing EDIT key.
5-3
The F/T (force/angle/tension) key typically toggles
thesystem between its three modes of operation (see
SECTION IX) when pressed. Menu configuration allows
angleand tension modes to be deselected (Y = no for
tension or angle modes of operation), if desired. If
angleand tension modes are turned off, the instrument
willdisplay only force data at all times, otherwise the
keywill toggle between all operational modes.
A second selection determines the power-up mode
of operation. Select FORCE, ANGLE, or TENSION to establish the default power up mode.
NOTE: If angle and/or tension modes are
deselected, they cannot be designated for power-up
default.
SECTION 6.
Process Outputs
6.1.1 Output Definition
LCt-104 systems provide up to four highresolution analog current outputs, representing
either force or tension, for driving external
process equipment/recorders. Units are
configured for either 4-20 or 0-24 mA operation
(note: 100 ohm load resistance reduction with 024 mA) depending upon sales order instructions.
Output(s) is based upon a 16-bit digital to analog
(D-A) conversion, which represents up to one
part in 65536 of analog precision. Output scaling
is performed after calibration and can be ranged
for any portion of the force or tension output
curve.
6.1.2 Set-Up Procedure
Connect a current meter to the rear panel
analog output points (see Figure 2-10 for +, designations) and proceed with ANALOG I/O
configuration as shown in Figure 6-1
6.2
SERIAL COMMUNICATION
LCt-104 units come with a versatile, bidirectional, serial communication port.
Electronically, this port can
be configured for RS-422 multi-drop (loop), RS422 full duplex (point-to-point, transmit/receive),
or RS-485 half duplex (point-to-point, transmit
then receive) operation. Selection is made via
rear panel DIP switch positions 1-4 (see Figure
2-9). After selecting the electrical interface, the
port operating parameters must be entered
using the flow diagram presented in Figure 6-1.
Figure 6-2 (page 6-3) provides a full description
of each (serial communication) parameter block
depicted in Figure 6-1. Note that certain
parameter entries are dependent upon the print
format selection (accessed by pressing edit
when SERIAL I/O is displayed). Standard
indicators offer 3 formats; PRINT for output to a
printer, CON’T (continuous) for constant output
to a data logger, PLC, etc., and PC for full
6-1
duplex interfacing with a more sophisticated host
device. MODBUS RTU, Modbus Plus, Profibus,
Allen-Bradley Remote I/O, and DeviceNet
options are defined in later Sections of this
manual.
6.2.1 Transmit Only Output Formats
Both the PRINT and CON’T ASCII output
formats are ‘transmit’ only. The print format is
designed for use in conjunction with the front
panel PRINT key. Pressing the PRINT key
transmits all data strings that are selected `YES’
in Figure 6-1 to the printer. Table 6-1 shows the
printer output format used for each transmitted
data string.
Table 6-1. The Printer Output Format
Figure 6-1. Analog and Serial Communication Parameter Entries
6-2
Figure 6-2. Definition of Serial Communication Terms
The CON’T output string is defined in Table 6-2.
Continuous output transmissions occur at the time
rate selected in Figure 6-1. Continuous outputs
‘feed’ force tension, status, and address
information to a remote data logger or PLC type
device without operator intervention.
6-3
Output string formats can be modified to
accommodate custom interface requirements
(Figure 6-1). Leading zeros can be replaced with
ASCII spaces. STX (start of text), address, and
instrument status can be omitted by selecting
‘NO’. Units can be expanded or abbreviated in the
print format and dropped altogether from the
continuous format. Line feed can be deleted from
the CRLF output or both characters can be
replaced by an ASCII space. Figure 6-2 provides
definitions for each parameter to assist in
formatting custom output strings.
Table 6-2. The Continuous Output Format
6.2.2 Full/Half Duplex Bi-Directional
Interface
If PC output format is selected, units are capable
of transmitting and receiving ASCII data strings.
Table 6- 3 (page 6-6) presents digit for digit data
and syntax information for this interface.
Basically, the LCt-104 has 92 internal (EEPROM)
registers that store all calibration, configuration,
operation, and live force/tension data parameters.
The PC format allows data in these registers to be
read or rewritten. By re-writing operating
parameters, LCt-104 systems can be quickly
reconfigured by a remote host device.
Note: Downloading data to the Model LCt-104 is
accomplished by sending a 3 character command,
the data enclosed in brackets <>, and a carriage
retum as shown in Table 6-3. The response will be
staggereddepending upon the time it takes to
store the data. First the command will be resumed
and then after the data is stored the CRLF
(carriage return/line feed) ornext command will be
returned.
Several additional tables are provided to explain PC
interfacing. Table 6-4 (page 6-7) provides
examples of EEPROM reading/writing, and error
code exchanges.Table 6-5 (page 6-8)
demonstrates live weight transactions.
6.3
SET POINT CONFIGURATION
Model LCt-104 controllers provide eight outputs
for set point operation. Standard units offer open
collector/ TTL signals at the rear panel connector.
Optionally, triac based analog outputs may be
ordered. In either case, the output signals are
identical, based upon configuration selections
presented in Figure 6-1. Following the flow
diagram to select main or dribble function for each
output used. Also, select the polarity (valve `ON'
above or below set point) and a tag description
(name) for each set point.
6-4
6.3.1 Main Set point Function and
Selections
Main corresponds to the actual desired force or
tension set point value. To avoid relay “chatter”
(subsequent off/on fluctuations), enter an
INFLIGHT value which corresponds to the main
value plus a small fluctuation tolerance band. Set
point polarity (i.e. valve on below or above
selected value) can be configured for each main
set point. The TAG selection allows each main set
point to be designated by an alphanumeric name
or number. Tag designations are communicated
through the PC and PLC interfaces to a host
device.
NOTE: BLH recommends that set point relays
should always "OPEN" when an error condition is
detected. This, however, is a customer based
decision.
6.3.2 Entering/Altering Main Set
points
Main set point values may be entered/ altered at
any time by pressing the front panel STPNT key. Use
theprocedure shown in Figure 6-3 to enter/alter
main set points.
6.3.3 Dribble Set point Function and
Selection
Dribble or secondary set points are not used in
the LCt104 at this time.
Figure 6-3. Entering or Altering Main Set
points
6-5
Table 6-3. PC Interface Register Allocations
6-6
Table 6-3. PC Interface Register Allocations (continued)
Table 6-4. Interface Error Code Definitions
Table 6-5. PC Interface Live Data Transactions
6-7
6-8
Table 6-6. PC Interface Set point Data Transactions
6-9
Table 6-6 con’t. PC Interface Set point Data Transaction Examples
6-10
SECTION 7.
System Diagnostics
7.1 OVERVIEW
LCt-104 diagnostics provide easy access to
criticaloperating system data, and
test/verification procedures for many indicator
functions. Figure 7-1 (next page)presents the
diagnostic flow diagram. Follow the procedures in
this diagram to view values, set function
limitations, test the front panel keypad, and verify
I/Ofunctions.
zero
keys will not function beyond if the range is
exceeded.
7.5.2 Overload Limit
This value is critical for system protection.
Repeatedsystem overloading may permanently
damage load cellsand other process equipment.
Enter a value of up to 150% of system capacity.
7.5.3 Motion Limit Selections
7.2 DIAGNOSTIC USER
Diagnostic user provides three registers for
storage of customer tag and calibration records.
Users may enter a tag number, current
calibration date, and projected date of next
calibration, if desired.
Motion determines how many counts must be
exceeded before the ‘in motion’ alarm
annunciator is activated. The motion timer
determines how long the motion alarm remains
activated after the motion condition is cleared.
7.6 FRONT PANEL KEY TEST
7.3 DIAGNOSTIC VERSION
Diagnostic version provides the software version
for thefront end and the jbox, the installed option
code derived from the ordering specification, the
serial number,and the date of the factory
calibration. Also included is the baud rate for the
jbox/front end interface.
DIAG KEYPAD allows an operator to
functionally test any/all front panel keys. Press any
two keys simultaneously to exit.
7.7 CHECK REMOTE INPUTS
7.4 ZERO RECALL
DIAG INPUTS is a check of all remote inputs. If
inputs are inactive, their respective numbers will
appear (54321). Once activated, the input number
will change to a dash.
Recall allows operating personnel to view
current zero values. Press the INDV UNITS key to
see values forindividual cell channels.
7.8 TEST/VERIFY THE ANALOG
OUTPUT
7.5 SELECTING LIMITS
Diagnostic limits allow operator entry of ‘not-toexceed’ values for critical system functions. Most of
these selections can be assigned to a front panel
annunciator (A1-A8, paragraph 5.1.3) to provide
visual indication ofthe error condition.
7.5.1 Zero Limit
The value entered for zero will limit the range of
the
front panel zero keys (recommended 2-20%). The
7-1
DIAG ANALOG tests the analog output. Test
shouldbe performed with a current meter
attached. Testing firstly shows the actual analog
count value being transmitted. Since the analog
output is based on a 16-bit D-A conversion, the
percent of span can be calculated by dividing
the displayed counts by 65535. Secondly, any
value may be entered to test the analog output.
Enter a known value such as 65535 (max
setting) and check current meter for appropriate
output. Exiting this menu will automatically
discontinue the test mode.
Figure 7-1. LCt-104 System Diagnostic Routines
7-2
7.9 TEST/TROUBLESHOOT THE
SERIALOUTPUT
DIAG SERIAL provides the means to view both
the transmit and receive buffers. After pressing
EDIT, use the left/right arrow keys to increment
forward or decrement backward through the
selected buffer and view the hexadecimal value of
each character. Using this procedure, incoming
data requests can be checked for protocol/
syntax accuracy and compared to LCt-104 output
responses.
7-3
7.10 TEST/TROUBLESHOOT THE
OPTIONAL DEVICENET OR
PROFIBUSOUTPUT
DIAG DEVICE N provides the means to view the
status of the OPTION PROTOCOL interface. After
pressingEDIT, scroll through the menu to see the
error number(if an error exists), the number of
resets, and the current values of the receive and
transmit buffers.
SECTION 8.
The LCt-104 Security System
8.1 INTRODUCTION
From password access to individually selectable
menuand key ‘locks’, LCt-104 software protects
the entiresystem from overt tampering or
accidental data/configuration/calibration
alterations. Figure 8-1 (next page) presents the
security menu flow diagram. Follow the
procedures designated to secure as many
parameters as desired.
8.1.1 Lock On/Off
Lock ‘On’ restricts access to the security menu
and allother menus/keys designated as ‘locked’.
If locked, the designated password (see paragraph
8.2) must beentered to gain access to the
security menu. Units are shipped with the lock
‘Off’ to allow initial configuration without a
password.
8.1.2 Menu Locks
Any or all of the LCt-104 main menus can be
‘locked’ to prevent parameter changes. To lock a
menu, chooseON by pressing the EDIT and
RIGHT arrow keys insequence. Then press
ENTER to store. Once a menuis designated as
locked access to that menu is barred.To ‘unlock’ a
locked menu, return to the security menu,enter the
correct password, and change the status toOFF.
8.1.3 Key Locks
Five of the LCt-104 front panel keys can be ‘locked’
toprohibit key function. Keys that can be locked
are;ZERO, L/R, F/T, PRINT, and EDIT. To lock
a key, choose ON by pressing the EDIT and
RIGHT arrowkeys in sequence. Then press
8-1
ENTER to store. If akey is designated as locked,
it will not function whenpressed. To ‘unlock’ a
locked key, return to the security menu, enter the
correct password, and change thestatus to OFF.
8.2
PASSWORD ACCESS
If lock ON is selected (paragraph 8.1.1), a
password must be entered to regain access to the
security menu.The following paragraphs explain
how to select and entera password. Once a
password is chosen, it should bewritten down and
stored in a confidential area.
8.2.1
Selecting/Storing a Password
A password can be any combination of alphanumericcharacters up to seven digits long. It is
not necessaryto use all seven digits.
At the PASSWORD display, key in the
designated characters using the arrow keys
(LEFT/RIGHT to change digits, UP/DOWN to
select character). When the password is correctly
displayed, press ENTER to store.
8.3
Entering the Password
If the lock is ‘ON’, the password must be entered
to access the security menu. With the display
reading SECURITY (a row of dashes above),
press EDIT. Use the arrow keys to enter the
complete password, as it was stored, on the row
above SECURITY. When the correct password
is displayed, press ENTER. Note that entering
the password does not turn the lock off; it simply
allows access to the security menu. If the lock is
left ON, the password must be entered each
time the security menu is accessed.
Figure 8-1. Security Menu Options.
8-2
SECTION 9.
Operation and Tension
9.1 GENERAL
LCt-104 indicator/transmitters power up in the
force, tension, or angle mode depending upon the
selection made in paragraph 5.1.6. If no critical
system errors are detected, the front panel
display will showthe selected mode current
value.
Tension parameter selections (see paragraph
9.8) affect system operation. Therefore, the
tension menu,Figure 9-3, is included in this
Section.
Figure 9-1 presents the front panel switch
functions for the operating mode. F/T toggles the
operating modefrom force to angle to tension (if
all enabled). ZERO performs push to zero and
L/R switches the displayfrom cell A to cell B (2 cell
system only). PRINT/COMtransmits the current
display and status data to a printer if print format
is selected. If the LCt-104 is connected to a host
computer or PLC; F/T, L/R, ZERO, and PRINT
functions can be initiated remotely using the rear
panel digital inputs.
9.2 FORCE DISPLAY MODE
In the force mode, all of the live weight of the system
isdisplayed on the front panel. Live weight does
not include the dead weight of the roll or other
mechanicalequipment that is factored out during
calibration. Toview individual side force values,
press the L/R key.
Figure 9-1. Front Panel Operating Keys
9.3 TENSION DISPLAY
Tension displays the actual tension value as
combination of both left and right (A and B) cells.
To view individual side tension values, press the
L/R key.
9.4 ANGLE DISPLAY
Angle displays the actual resultant force angle
value (FR) as a combination of both left and right
9-1
(A and B) cells. To view individual side angle
values, press the L/R key.
9.5 ZERO OPERATION
A new zero can be acquired to compensate for
changes in the dead load of the system due to
roll changes etc. Acquiring a new zero reference
value does not affect the slope of the calibration.
The push to zero range in the LCt-104 can be
configured from OFF to 100% of system
capacity (or 9999999). Zero may be acquired
only if the system is not in motion and the zero
limit has not been exceeded.
9.6 INDIVIDUAL CHANNEL
DISPLAYS
Viewing individual channel (2 per cell) live,
throughout the entire process, allows operating
personnel to profile system trends or tendencies
and adjust equipment for maximum
performance. Although the total system may
never overload, certain cells may experience
overload or underload ‘moments’ which can
affect cell integrity, longevity, and ultimately,
product quality.
LCt-104 technology allows operating personnel
to view individual load cell data in one of three
forms. In accordance with Figure 9-2, view either
the unit force value (individual units), millivolt per
volt signal (individual mV/ V), or the percent of
total load (individual %) each cellchannel is
carrying.
9.7 ERROR DETECTION AND
CORRECTION
Should an error condition occur, a scrolling
messagewill appear on the bottom line of the
front panel display. As much as possible,
messages define the exact error and suggest a
remedy. Once the error is cleared, the scrolling
message will stop and normal operation will
resume. Table 9-1 presents all error messages
withrecommended solutions.
Figure 9-2. Individual Load Cell View Keys
9-2
9.8 TENSION PARAMETER
SELECTIONS AND OPERATION
display, the end result will equal three decimal
places.
Figure 9-3 presents tension parameter selections
and a brief description of each. Parameters
entered can affect system operation so please
consider options carefully. If LB or NT (calibration
parameters) units are selected, operation is
unaffected. Choosing PLI (pounds per linear inch)
or N/M (Newton meters) changes the display
readout and potentially operation. With PLI orN/M
selected an additional choice, Auto wrap (OFF/
ON) is available.
Note: Setting the tension decimal place too high
canresult in a display overrun. Look at the tension
datawithout a tension decimal point applied, and then
increasetension resolution to desired level.
Choosing auto wrap automatically changes the
tension output as wrap angles change. In
winding/rewinding zones, wrap angles change as
the roll diameter increases or decreases. This
unique feature facilitates smooth winding with
consistent tension force as the roll size increases
or decreases.
Read the following paragraphs and enter the
tensionoperation parameters that offer optimal
machine function.
9.8.3 P/inches or N/meters:
Enter value for inches or meters down to 1/10 of
inch or meter. The highest setting can is one
thousand inches or meters.
9.8.4 Wrap Angle
Enter the web wrap in degrees; entry must be
between 1.0 and 360.0. This measurement is the
amount of wrap covering the roll from entry point
to exit point.
9.8.5 Auto Wrap - Maintain Constant
Tension
Turning the auto wrap feature on allows for constant
tension to be monitored and maintained. This
feature needs a reference angle to be acquired
first (see next step).
9.8.1 Web Units
Web units are based upon selection of units in
calibration routine. If pounds were selected (LB)
the choicehere is (LB or PLI) pounds or pounds
per Linear inch. If Newtons were selected in
calibration routine the choice here is (NT or N//M)
Newtons or Newtons per meter. Selecting LB or N
requires only entry of wrap angle. Selecting PLI or
N/M requires input of next three entries.
9.8.2 Web Decimal Point
Adjustment
Displayed tension data can be shifted or
corrected.Web length when entered causes
displayed tensiondata to decrease. Adjusting the
decimal point position can increase resolution and
enhance the data display.
Three decimal places are available for tension
resolution enhancement. Note, however, that this
decimal selection is combined with the calibration
decimal value previously selected. Therefore, if
one decimal place is used for system calibration
and two decimal places are used for the tension
9-3
Auto wrap increase or decreases the tension
automatically as exit or entry angles change on
the roll feedingor reeling the product.
In zones with changing angles, tension needs to
be adjusted because accurate measurement is
based upon angle or amount of roll wrap.
9.8.6 Angle Reference
Angle reference can be written by inputting the
value here on this screen or by going to operate
mode andselecting the angle display. Viewing the
angle display, press the side (L/R) key, till an ‘R’
appears indicatingthe current reference angle. Now
press the edit key thenew reference angle is
acquired.
Pressing the left arrow key here will also show the
difference between the current reading for angle
and thereference angle, which is used to calculate
the newtension data and keep tension constant.
Figure 9-3. Tensioner Parameter Entries.
9-4
SECTION 10.
Allen-Bradley Remote I/O
This chapter describes the Allen-Bradley
Remote l/O (RIO) communication link between
the LCt-104 Process Web Tension System and
an Allen-Bradley PLC-5. Remote l/O interfacing
uses technologies licensed to BLH from AllenBradley. Functionally this simple digital interface
expedites the transfer of tension/force data,
system status, and diagnostic information. It also
significantly simplifies the retrieval and download
of filter and other set-up parameters.
10.1 INTERCONNECT CABLE
LCt-104 units ordered with the Allen-Bradley
Remote l/ O option have an additional 3-socket
mating half connector. Connector and wiring
designations are presented in Figure 10-1.
Connect 'Blue Hose' cable to the supplied
connector as designated.
10.2 RIO OVERVIEW
The Allen-Bradley Remote l/O (RIO) interface is
a communications link that supports remote,
time critical l/O control communications between
a master processor and a remote l/O slave unit.
It is typically used to transfer l/O bit images
between the master and slave. The LCt104
represents a quarter (1/4) rack of discrete l/O
with 32-bit input and output image files. Time
critical system information (tension/force and
status data) is communicated to the PLC using
discrete read and write commands. Block
transfers are used to upload and download nontime critical information such as diagnostic,
status, and individual channel data.
10.3 THE ALLEN-BRADLEY PLC
Allen Bradley PLC-5 programmable controllers
are typically used as part of a distributed
process automation architecture. A variety of
1771 series racks and l/O modules are available
for local or remote discrete and analog process
control. PLC-5 units digitally communicate to
other devices using a conventional RS-232 or 423 serial port in addition to special interface
ports such as Data Highway Plus, Scanner
Communications, and Remote l/O Adapter.
10.4 THE REMOTE l/O INTERFACE
10.4.1 Operational Overview
The Allen-Bradley Remote l/O (RIO) interface is
standard on many PLC-2, 3, and 5 series
programmable logic controllers. The technology
used in the interface and licensed by AllenBradley to BLH enables the LCt104 system to
communicate tension/force information to the
PLC as if it were 1/4 rack of discrete l/O. Using
the standard RIO interface port to represent
tension/ force data as simple discrete l/O, a low
cost reliable communication link between the
PLC and system is established. Standard PLC
ladder logic instructions convert binary data to
an integer or floating point weight value without
special software drivers and scan delays that
occur when data block transfers are used. The
LCt also communicates status information, and
diagnostic data to the PLC.
NOTE: Transfer data differs according to mode
selection.
Figure 10-1. Allen-Bradley Remote I/O Cable Connection
10-1
Figure 10-2. Remote I/O Menu and Cable Considerations
CONFIGURATIONS:
One Quarter Rack. The LCt-104 ¡s configured to
act as1/4 rack of l/O using 2 input words and 2
output words in the PLC's l/O image table. Four
LCt-104's constitute 1 full rack, each using a
different starting quarter.
Discrete Transfer. Tension/force data and operating
status information transmitted through discrete
transfer using the PLC's Remote l/O image table.
Block Transfer. Block data transfers are initiated
bythe PLC ladder logic program to obtain more in
depthstatus, diagnostic, and individual load cell
data.
Word Integrity Is Ensured. LCt's always transmit
both input image table words intact. To ensure
word integrity on the PLC side, immediate writes
10-2
to the output image table should be written low
word first.
10.4.2 Interface Configurations
Baud rate, rack address, starting quarter, and
last rack designations are all configured through
the LCt l/O sub-menu (Figure 10-2). Access the
l/O sub menu (reference operator's manual for
keypad functions), step tothe l/O RIO display, and
make selections. The LCt isable to be addressed
up to rack number 77 (octal).
Additional Figure 10-2 information provides a
relationship table for baud rate, cable length, last
rack termination resistance, and the number of
LCts on the RIO loop. Careful consideration must
be given to all four factors to ensure proper RIO
loop operation.
10.4.3 Discrete Data Transfers
10.4.3.1 Output Image Table
The PLC-5 initiates the communication interface
by transmitting two words from the output image
table (Figure 10-3). The first word is regarded as
a 'spare' by the LCt-104.
The second word contains the commands that
the PLC-5 expects the LCt-104 system to
perform. Word 2 controls set points, filter
selection, filter operation, and operating mode
status.
Table 10-1 shows the structure and bit definition
of eachOutput Image Table word.
10.4.3.2 Input Image Table
After evaluating the contents of the output image
table, the LCt-104 responds by transmitting two
words to the input image table (Figure 10-4).
The first word contains signed integer weight
data. The second word contains the upper order
data bits, system status, error condition, and set
point status information.
Table 10-2 defines the bit structure of both input
words.
10-3
Figure 10-3. and Table 10-1. Remote I/O Output Image Table Bit Designations
10-4
Figure 10-4. and Table 10-2. Remote I/O Input Image Table Bit Designations
10.5 BLOCK DATA TRANSFERS
10.5.1 Interface Basics
Block data transfers are initiated by the ladder
logic program write (BTW) and read (BTR)
commands. Thetransfer sequence begins when
the PLC sends a one word (1 6-bit integer) write
command containing a register location pointer.
This pointer is the 16 bit integer value of the first
register the PLC wishes to read (factory default
upon shipment is register 1).
10-5
Table 10-3 presents all available single and
double word register locations. After establishing
the starting register location, the PLC then
transmits a read transfer block command telling
the LCt-104 how many words of information are
needed.
10.5.1.1 Block Transfer Reads (BTRs)
Once the register location pointer value is
established, the PLC logic program must issue a
block transfer readcommand to obtain information.
A BTR can request up to 64 words of LCt-104
information (see Table 103). The LCt responds to
the BTR by transmitting the number of words
requested, starting at the pointer location.
NOTE: The first word transmitted by the LCt will
be theregister pointer value. This word is added at
the beginning of the transmission to 'echo' the
pointer value priorto transmitting requested data.
Therefore, the BTR command MUST add 1 to the
number of words requested.If the PLC needs four
words of LCt information, the BTR request must
be for five words (Figure 10-5).
(read) repeatedly without having to re-write the
register location word. Ofcourse the register pointer
can be changed as often asneeded, but the last
written location will always be remembered, even
during power down. This feature savesa lot of BTWs
when the PLC is monitoring a particularregister or
block of registers over a period of time.
10.5.3 Fault Evaluation
Four status words, register locations 1, 2, 3, and
4provide detailed explanations of error conditions
experienced by the LCt-104 system. When a fault
is detected, bit 15 (fault) in word 2 of the input
image table is set to a '1' to alert the PLC of an
error condition. The PLC must then perform a
BTR of the four status registers to evaluate and
correct the error. Table 10-4 gives the status
word bit designations.
Figure 10-5. A Block Transfer Read Command
10.5.4 Remote Filter Configuration
Figure 10-6. A Block Transfer Write Command
The filter 'pore' parameter can be changed onthe-fly by the PLC. This unique feature allows
optimal, predetermined filtering parameters to be
implemented at critical moments during system
operation. Changing filter parameters throughout
the process ensures data stability and maximum
system response to actual tension/force changes.
The pole parameter is stored at register location
136 (Table 10-3). Make pole selections in
accordance with Section IV guidelines.
10.5.1.2 Block Transfer Writes (BTWs)
Some registers may be written to by the PLC
(indicated by a 'W' in the R/W column table 10-3).
This allows parameters such as filter, set point,
and diagnostic values to be down loaded on-the-fly
by the PLCladder logic program. When writing to
the LCt-104, thefirst word must be the register
location pointer. Therefore, the program MUST
always add 1 to the BTW command length
(Figure 1 0-6). For example, to change the filter
value, the BTW length must equal 2 with the first
word being the filter register location pointer and
the second word being the new pole value.
10.5.2 A Perpetual Pointer
One advantage to block transfers is that the
register pointer is retained in LCt-104 EEPROM
memory. Whena write block selects (points to) a
register location, that location may be accessed
10-6
Table 10-3. Allen-Bradley Remote I/O Register Allocations.
10-7
Table 10-4. Status Register Bit Definitions
10-8
Table 10-4 con’t. Status Register Bit Definitions
10-9
SECTION 11.
Modbus Protocols
11.1 MODBUS RTU PROTOCOL
This interface method is applicable to virtually
any PC or other process control computer with
Modbus RTU Master communication capability.
The interface provides tension/force and
diagnostic information and allows for remote
control of, zero, force/tension, and print
functions. Information is transmitted in blocks of
data, thereby minimizing polling and response
time delays. The interface operates with the LCt104 configured as the slave device and the host
computer as the master. To initiate Modbus RTU
protocol, simply select the Modbus format as
shown in Figure 6-1 (page 6-2). Modbus RTU
uses the standard LCt-104 RS-485/422
communication port and requires no hardware
alterations. RTU format also available on UART
or with RS232 (see Figure 11-1a).
11.1.1 Common Data Format
Table 11-2 presents a complete overview of
Modbusregister and bit allocations. Table 11-2
information which appears in conventional text
applies to both ModbusRTU and Modbus PLUS
formats. Allocations whichpertain only to Modbus
Plus appear in italic text. Inaddition to Table 11-2
information, the following dataformats and
definitions are identical for both Modbusprotocol
options:
Tension/force Data (BLH format for Modbus
Plus) - Two 16 bit signed integers, the first (high)
integer mustbe multiplied by 32768 and then
added to the second (low) integer.
Status and setup parameters - One 16 bit
unsigned integer.
Alpha data - For each register: high byte is first
character, low byte is second character.
11-1
NOTE: If a decimal point is required the resulting
valuemust be multiplied by the appropriate
fraction, i.e. 0.01 for hundreds of a unit. In the
case of mV/V values the multiplier is 0.000001.
The LCt-104 range is (- 999999/+9999999).
NOTE: counts refers to displayed counts. If
displayed tension/force is counting by 2 lb
increments then presetting a register to 9 would
mean 18 lbs.
11.1.2 Modbus RTU Functions
Supported
2 Read Input Status
3 Read Holding Registers
06 Preset Single Register
16 (10 Hex) Preset Multiple Registers
11.1.3 Setup
Modbus RTU format, Device address, baud rate,
andparity are all selectable under the SERIAL 1
section of the I/O MENU.
11.2 MODBUS PLUS INTERFACE
is an official ModConnect® Partner. As such,
BLH has been authorized by Schneider
Automation to incorporate Modbus Plus
Communication Technology in its LCt-104 series
product line. Modbus Plus protocol allows the
LCt-104 to communicate on a peer-to-peer
network link with Modicon 984 and Quantum
PLCdevices.
LCt-104 units with the Modbus Plus option have
a custom rear panel with a specific MODBUS
PLUS connector (see Figure 11-1b next page
and paragraph11.2.3). The Modbus Plus
interface does not use the standard LCt-104 RS485/422 communication port.
Figure 11-1a. Modbus RTU Rear Panel (UART Version) with Interface Designations
Figure 11-1b. Modbus Plus Rear Panel with Address Designations
Table 11-1. Routing Path Address Designations
11-2
11.2.1 Routing Path Addressing
The LCt-104 Modbus Plus node is a Host
Computer node with 8 data-slave input paths.
When using Read/ Write MSTR operations, or
multiple Modbus Plus networks, take note of the
message routing format. A routing address is
five bytes in length. This allows communication
between multiple Modbus Plus Networks over
Bridge Mux hardware devices. Since the LCt is a
host computer node, two of the five routing
address bytes are required to identify it.
The next-to-last non-zero byte specifies the
network node station address (1-64). The last nonzero bytespecifies the input path or task number
(1-8) to whichthe message is assigned. The other
three routing address bytes allow communication
through up to 3 Bridge Mux Devices. Table 11-1
depicts the addressrouting path for an LCt device
at address 12, using path/task number 1.
NOTE: If multiple devices access the same LCt,
BLH recommends using a different task/path
number for each requesting device. This will
prevent address contention problems.
NOTE: Host device routing path format is
different from PLC designated device addressing.
When using PLCdesignated devices, the input
path/task number is notrequired since it is
automatically selected.
NOTE: BLH assumes reader/operator familiarity
with Modbus Plus token passing network operation.
Readers/operators unfamiliar with Modbus Plus
should obtain the ‘Modicon Modbus Plus
Network Planning and Installation Guide’ (GMMBPL-001) and ‘Modicon Ladder Logic Block
Library User Guide’ (840 USE 101 00) from the
Schneider Corporation.
11.2.3 Wiring and Node Addressing
Wiring is simply a matter of connecting the
Modiconsupplied, 9 pin D-type connector cable
to the LCt-104rear panel Modbus PLUS D-type
socket mating half (see Figure 11-1b).
LCt-104 nodes may occupy any station address
location from 1 to 64. Selection is made at the
rear panel(see table in Figure 11-1b) DIP Switch
designated ADDRESS. Add ‘1’ to the switch
selection to obtain the actual address (i.e.,
selection-0 +1 =1). DIP switchpositions 7 and 8
are unused.
NOTE: Switch selections are read only during
power-up. If the address selection is changed, the
instrumentmust be powered down and then
powered up again.
11.2.4 Configuration
Figure 11-2 presents the Modbus Plus
configuration menu. Parameters are as follows:
ADDRESS is non-configurable. It simply
indicates that the network has recognized the LCt104 device at thedesignated address.
GLOBAL DATA allows up to 7 words of live
tension/force and status data to be selected for
broadcast with each token pass. Each item
selected represents twowords of global data. The
first item selected ‘YES’ becomes the first two
words, the second ‘YES’ becomes words three
and four, and so forth. The seven available
selections, status 1-4, tension, force, and angleare
defined in Figure 11-2.
ROTATION is non-configurable. Rotation shows
the time
used for one complete token pass of all network
nodes.
11.2.2 Global Data Transfers
11.2.5 Data Formatting
For high speed process control, BLH
recommends that global data transfers be used.
LCt-104 Global dataallocations are defined in the
Figure 11-2 parameterselection menu.
Table 11-2 presents a complete overview of
Modbusregister and bit allocations. Table 11-2
information which appears in conventional text
applies to both ModbusRTU and Modbus Plus
formats. Allocations which pertain only to Modbus
Plus appear in bold italic text.
11-3
BLH formatted tension/force data consists of two
16bit signed integers, the first (high) integer
must be multiplied by 32768 and then added to
the second (low)integer (see illustration, top of
next column).
NOTE: To display flashing status on the LCt-104
frontpanel, configure an Alarm/Status
Annunciator for ‘Modbus Plus Status’ indication
(see Section V).
11.2.7 Manipulating The Front Panel
Display
NOTE: If a decimal point is required the resulting
valuemust be multiplied by the appropriate
fraction, i.e. 0.01for hundreds of a unit. In the
case of mv/V values the multiplier is 0.000001.
The LCt-104 range is (- 999999/+9999999).
NOTE: counts refers to displayed counts. If
displayedtension/force is counting by 2 lb
increments then presetting a register to 9 would
mean 18 lbs.
11.2.6 Flashing LED Status
A flashing green ‘ACTIVE’ LED located on the LCt104rear panel (Figure 11-1) indicates the status
of Modbus Plus network operation. To interpret
flash patterns, refer to the Modbus Plus Planning
Guide (GM-MBPL004).
11-4
Provision has been made for the host PLC to
displaymessages on the LCt-104 front panel
display. Messages may occupy both the upper (7
character) and lower (8 character) display lines
(Figure 11-3, page 11- 8). To send a message,
the host PLC transmits the message coded in
conventional ASCII characters* toregisters 40258
thru 40265 along with a display controlword;
register 40257. Information written to these LCt104
registers determines not only the message content but also the display time period.
When the host message display time period
expires,the LCt-104 will revert to its normal
tension/force/status display. See Table 11-2 and
Figure 11-3 for a detailed breakout of register
allocations and byte designations. Host messages
displayed on the LCt front panel can be used to
alert operators to error conditions, prompt
required inputs, etc.
NOTE: Host messages are not displayed if the
LCt104 is in any calibration or parameter
configuration menu mode.
Figure 11-2. Parameter Selection Menu and Global Data Designations
11-5
Table 11-2. Modbus RTU and Plus Register Allocations
11-6
Table 11-3. Status Word Bit Designations
11-7
Table 11-3. Status Word Bit Designations (continued)
11-8
Figure 11-3. Front Panel Display Write - Register and Byte Allocations
11-9
SECTION 12.
Profibus Protocol
This chapter defines the optional Profibus
interface as it pertains to BLH LCt-104
instruments. Profibus, standardized in the
European standard EN 50 170, is the operational
network interface for Siemens PLC based control
systems.
12.1 THE INTERFACE DEFINED
Consisting of three communication levels, the
interface structure was designed for high-speed
(up to 12 mbaud) communication between master
(typically PLC) and slave devices.
12.1.1 Profibus DP
Although three communication levels exist, LCt104units communicate only at the Profibus DP
(decentralized periphery) level. At this level, LCt’s
are dedicatedslaves with no master status or
functionality. They cannot manipulate the bus or
control token passes. Theywill respond quickly,
however, to any master device on the network.
12.1.2 GSD Files (see paragraph
12.7)
GSD files are required to establish
communication on the Profibus network. GSD files
contain all device specific parameters such as
supported baud rates, message lengths, I/O
numbers, and diagnostic messaging. BLH
supplies two GSD files on the accompanying
diskette included with each order. Read the
HINTSGSD.rtf file contained on this diskette and
load the appropriate GSD file into the master(s)
network device.
12.2 INTERFACE WIRING
Figure 12-1 depicts the LCt-104 rear panel wiring
arrangements. Simply connect a shielded, twowire twisted pair cable to the PROFIBUS terminal.
Cableshielding MUST BE connected at both ends to
ensureproper operation. BLH recommends using a
Siemens nine-pin, sub D connector with
integrated termination (PN 6ES7972-0BA100XA0). If another connector is used, mandatory A
and B signals must be accommodated as well as
provision for termination, when required. For
12-1
reliable network operation, BLH recommends that
the first and last network node be powered up at
alltimes.
12.3 LCt-104 MENU CHANGES
With the Profibus option installed, parameter
selections change in several menus. These
changes override definitions and selections
presented in earlier chapters of this manual.
12.3.1 IIO Menu Changes
With Profibus installed, other expansion slot A
interfaces are disabled. Figure 11-2 shows the
modified I/O menu with Profibus available rather
than Modbus Plus or Allen-Bradley Remote I/O.
Additional Profibus selections allow individual units
to be reset or taken offline.
NOTE: Use ‘GO’ commands to take the LCt-104
off-line momentarily. This prevents the unit from
transmitting data invalid messages to the master
controller whileparameters/settings are being
changed.
Figure 12-1. Rear Panel Profibus Connector and Pin Designations
Figure 12-2. Profibus I/O Menu Change
12-2
12.3.2 Diagnostic Menu Changes
Figure 12-3 presents changes to the diagnostic
menu. Added features define Profibus errors if
they occur and current online/offline status.
Figure 12-3. Profibus Diagnostic Menu Change
12-3
12.3.3 Display Menu Changes
See Figure 12-4 for alarm annunciator changes.
TheProfibus selection allows the lower rear
panel network status LED activity to be mirrored
on one of the eight front panel annunciators.
Behavior of this LED is network specific and
defined in Figure 12-4
.
Figure 12-4. Display Menu Changes
12.4 DATA EXCHANGE FORMATS
LCt-104 Profibus input and output data formats
consistof up to 8 bytes each as shown in Table
12-1. Each grouping of two bytes constitutes one
16-bit word.
Table 12-1. Data Exchange Formats
12.4.1 Produced Data (LCt-104
Transmission)
The input data string is transmitted by the LCt104 tothe requesting master device. Each string
consists of eight bytes and breaks down as
follows:
Byte 1. Message #: Message # is an echo of
the first byte of the output data string (transmitted
by the master). This is used by the master for
data transfer verification.
Byte 2. Input data ID: Data ID code as shown in
Table 12-4.
Bytes 3 & 4. Status: The LCt-104 operating status,
each bit of the word madeup of bytes 3 & 4
represents specific operating status. The
descriptions of the bits are in Table 12-2. Bits 0 7are in Byte 3, bits 8 - 15 are in Byte 4.
12-4
Bytes 5 - 8 (Words 3 & 4). Input data: These
two words contain the actual weight value (low
word and then high word). Word 3, low word, is a 16
bitsigned integer -32768 to 32767 with byte 5
being thelow byte. Word 4, high word, is a 16 bit
signed integer times 32768 with byte 7 being the
low byte. If word 3 = 2 and word 4 = 1 the total
data value would be 32770 (2+ 32768).
Table 12-2. Status Word Definitions
as well. Byte 2 of the Profibus output provides
output data ID code as shown in Table 12-4.
Bytes 3 & 4 (Word 2). Command: This
command word is used by Profibus master to
control LCt-104 (as a slave). The meanings of
commands are shown in Table 12-3.
Bytes 5 - 8 (Words 3 & 4). Output Data: The
third and forth words of the Profibus output are low
word and high word of the actual download data.
Word3, low word, is a 16 bit signed integer -32768
to 32767.Word 4, high word, is a 16 bit signed
integer times 32768. See example in Inputs
Words 3 & 4 definition. See Table 5 for ID codes
and definitions of writable data.
Table 12-3. Profibus Master Command List
12.4.2 Consumed Data (LCt-104
Receive)
Data sequence format:
Output data is transmitted to the LCt-104 by the
requesting master. It consists primarily of
command andID data. ID data is defined in Table
12-4. Each stringconsists of eight bytes and
breaks down as follows:
Bytes 5 - 8 (Words 3,7 & 4,8). Input Data: Byte 5
swaps with byte 6 & byte 7 swaps with byte 8.
Byte 1. Message #: Any number between 0 and
255 generated by themaster and copied by the
LCt-104 into the first byte of the input string. This
is for host data transfer verification.
STANDARD format is Byte 5 low and byte 6
high, byte 7 low and byte 8 high.
Byte 2. Output data ID: When the Profibus
master issues a download command, it must
include the output data ID and the output data
12-5
Bytes 5 - 8 (Words 3,7 & 4,8). Output Data: Byte
5swaps with byte 6 & byte 7 swaps with byte 8.
SWAPPED format is Byte 5 high and byte 6 low,
byte7 high and byte 8 low.
NOTE: ASCII data and some bit data are not
reversible. Ex. Set point output name... See
register Tables fordetails
Table 12-4. Profibus Data Identification Codes
12-6
Table 12-4. Profibus Data Identification Codes (cont.)
12-7
Table 12-4. Profibus Data Identification Codes (cont.)
12-8
Table 12-4. Profibus Data Identification Codes (cont.)
FOR DISPLAY MESSAGING:
REGISTER 94 CONTROL
if bit 0 = 1 apply data in registers 95&96 to upper display
if bit 1 = 1 apply data in registers 97&98 to lower display
if bit 2 = 1 & bit 0 = 1 flash the upper display
if bit 3 = 1 & bit 1 = 1 flash the lower display
if bit 4 = 1 keep display on until this bit is written again as “0” bits 5-7
are spares, set to zero
timer; 0000010 bits 8-15 are the display timer, each increment adds 50
msec i.e. 00000001 = 50msec = 100 msec timer
Note: For display messaging all following hex code are acceptable.
**30 - 7A (hex) numbers and letters or symbols, also space 20H or
minus 2DH**
Note: Messaging will only display if LCt-104 is in operating display mode. (no menu routines)
Table 12-5. Profibus Status Registers 1 and 2
12-9
Table 12-6. Profibus Status Registers 3 and 4
12-10
Hints for Using the Right GSD File
12.5 LED STATUS INDICATION
Two bicolor (red/green) LED indicators are
mounted beside the network connector (Figure 131). The upper LEDindicates LCt-104 status while
the lower LED displays theProfibus Network
Status. If an LED is flashing, the nominal flash
rate is 500ms ON, and 500ms OFF.
12.5.1 LCt-104 Status
The upper (LCt-104 status) LED indicator flash
sequences are defined in the following Table:
12.5.2 Profibus Network Status
The lower (network status) LED indicator flash
sequences are defined in the following Table:
12.6 Profibus GSD FILE
Two GSD files (Table 12-7 and 12-8) are
provided for LCt104 Profibus operation. A GSD
file (Electronic Data Sheet) establishes a simple
format that includes the device's configurable
parameters and public interfaces to those parameters. It provides user friendly configuration
tools thatcan be easily updated without having to
constantly revisethe configuration software tool.
GSD files are used by network tools to read or
set device parameters.
12-11
Always attempt to establish system operation
with Revision 1 GSD code - Vblh_021.gsd as
presented in Table 12-7. This code defines the
real LCt-104 diagnostic length, thereby using
less memory in the Master device.
Table 12-7. Revision 1 GSD Code
(Vblh_021.gsd)
;****************************
; GSD-file for BLH LCT-SERIES
; GSD - Revision 1
;****************************
#Profibus_DP
;
GSD_Revision=1
Vendor_Name = “BLH”
Model_Name = “LCT Profibus Slave”
Revision = “Version 1.0”
Ident_Number = 0x086B
Protocol_Ident = 0
Station_Type = 0
FMS_supp = 0
Hardware_Release = “1.0”
Software_Release = “1.00”
9.6_supp=1
19.2_supp=1
93.75_supp=1
187.5_supp=1
500_supp=1
1.5M_supp=1
3M_supp=1
6M_supp=1
12M_supp=1
MaxTsdr_9.6=60
MaxTsdr_19.2=60
MaxTsdr_93.75=60
MaxTsdr_187.5=60
MaxTsdr_500=100
MaxTsdr_1.5M=150
MaxTsdr_3M=250
MaxTsdr_6M=450
MaxTsdr_12M=800
Bitmap_Device=”DP_NORM”
;
; Slave-Specification:
Auto_Baud_supp=1
Min_Slave_Intervall=2
Max_Diag_Data_Len=7
Slave_Family=0
Max_Module=0
Max_Input_Len=8
Max_Output_Len=8
Max_Data_Len=16
;
; UserPrmData: Length and Preset:
User_Prm_Data_Len=0
;
; <Module-Definition-List>
Module = “ 8 Bytes In/Out cons.”
0x97,0xA7
EndModule
If communication cannot be established with
Vblh_021.gsd,use the Revision Vblh_020.gsd
code presented in Table12-8. This code uses
more memory and limits the number of slaves the
Master can access. However, it may work for
some older Master devices that do not function
with Revision 1.
Table 12-8. Revision 0 GSD Code
(Vblh_020.gsd)
;=======================
; GSD-file for BLH GSD Rvision 0
; Stand : 01/05/04
;=======================
;
#Profibus_DP
;
;
;Instrument Identification
;
Vendor_Name = “BLH”
Model_Name = “LCt Profibus Slave”
Revision = “Version 1.0”
Ident_Number = 0x086B
Protocol_Ident = 0
Station_Type = 0
FMS_supp = 0
Hardware_Release = “1.0”
Software_Release = “1.00”
;
;
;Baudrates
;
9.6_supp = 1
19.2_supp = 1
93.75_supp = 1
187.5_supp = 1
500_supp = 1
1.5M_supp = 1
12-12
3M_supp=1
6M_supp=1
12M_supp=1
;
;
;Maximum responder time for baudrates
;
MaxTsdr_9.6 = 60
MaxTsdr_19.2 = 60
MaxTsdr_93.75 = 60
MaxTsdr_187.5 = 60
MaxTsdr_500 = 100
MaxTsdr_1.5M = 150
MaxTsdr_3M = 250
MaxTsdr_6M = 450
MaxTsdr_12M = 800
;
Redundancy = 0
Repeater_Ctrl_Sig = 2
24V_Pins = 0
;
;
;Slave specific data
;
Freeze_Mode_supp = 0
Sync_Mode_supp = 0
Auto_Baud_supp = 1
Set_Slave_Add_supp = 0
User_Prm_Data_Len = 0
;
; Default user parameter string
;User_Prm_Data = 0x00 ;# of defaults
specified here must match # specified
for
Maximum length of user paramter data
Min_Slave_Intervall = 2
Modular_Station = 0
Max_Input_Len = 8
Max_Output_Len = 8
Max_Data_Len = 16
;
Module = “ 4/4 Bytes In & 4/4 bytes
Out”
0x93, 0x93, 0xA3, 0xA3
EndModule
SECTION 13.
DeviceNet Protocol
This chapter defines the optional DeviceNet
interfaceas it pertains to LCt-104 instruments.
DeviceNet is alow cost industrial network
designed to easily connect up to 64 "cell" type
devices to a PLC/PC. Information in this section
defines the LCt-104 DeviceNet registerallocations
and interface instructions.
13.1 THE INTERFACE DEFINED
13.1.1 General ODVA DeviceNet
Description
DeviceNet is one of the world's leading devicelevel networks for industrial automation. In fact,
more than 40% of end users surveyed by
independent industry analysts report choosing
DeviceNet over other networks. DeviceNet offers
robust, efficient data handling because it is
based on Producer/Consumer technology. This
modern communications model offers key
capabilitiesthat allow the user to effectively
determine what information is needed and when.
Users also benefit fromODVA's strong
conformance testing policies, whichensure that
products are interoperable. As a result,users can
mix-and-match products from a variety of
suppliers and integrate them seamlessly.
NOTE: ODVA stands for Open DeviceNet
Vendor Association. For all specifications,
wiring, power, cable lengths, etc., please access
the ODVA web site. Reference: Specifications
DeviceNet Volume II, release 2.0 (latest
release), web address: http://www.odva.org
13.2 INTERFACE WIRING
Figure 13-1 depicts the LCt-104 rear panel
DeviceNetconnector. Each unit has a
DeviceNet compatible sealed micro connector.
Make connections in accordance with pinouts as
shown.
13.3 LED STATUS INDICATION
Two bicolor (red/green) LED indicators are
mountedbeside the network connector (Figure
13-1). The upper LED indicates LCt-104 status
while the lower LED displays the DeviceNet
Network Status. If an LED is flashing, the
nominal flash rate is 500ms ON, and 500msOFF.
13.3.1
LCt-104 Status
The upper (LCt-104 status) LED indicator flash
sequences are defined in the following Table:
LED
Status
Off
LCp-1 04 Network Status
Flashing
Red
Recoverable configuration fault (
invalidfirmware, OEM data, or
personality data)
Hardware error
Solid Red
Flashing
Green
Solid
Green
Red/Green
No Power
No errors, client interface is not
open
No errors, client interface is active
Configuration mode
13.3.2
DeviceNet Network
Status
13.1.2 LCt-104 DeviceNet Interface
Description
The lower (network status) LED indicator flash
sequences are defined in the following Table:
The LCt-104 DeviceNet interface uses vendor
supplied product technology. This product has
passed the compliance specifications set forth
by ODVA and is registered with them (ODVA)
by the vendor. BLH embeds this product in the
LCt-104 to communicate tension and parameter
data to a connected device. BLH is registered
with ODVA as Vendor #661.
LED Status
DeviceNet Network Status
Off
No Power
Flashing Red
I/O connection in timed-out
state or other recoverable fault
Solid Red
Unrecoverable fault
13-1
Flashing Green
Device is online but has no
connections
Solid Green
Device online with established
connections
Red/Green
Device is in communication
faulted state and responding to
an identify communication
faulted request
13.4 LCt-104 MENU CHANGES
With the DeviceNet option installed, parameter
selections change in several menus. These
changes override definitions and selections
presented in earlier chapters of this manual. The
following pages discuss specific changes to
several menus.
13.4.1
I/O Menu Changes
With DeviceNet installed, other expansion slot A
interfaces are disabled. Figure 13-2 shows the
modified I/Omenu with DeviceNet available rather
than Modbus Plus,Allen-Bradley Remote I/O, or
Profibus. Baud rates, address selections, and
commands can be selected though the front panel
display under the I/O DeviceNetmenu. Baud rate
selection must be identical to the master control
setting. The Mac ID address must beuniquely
different from all other nodes. Additional
DeviceNet selections allow individual units to be
resetor taken off-line.
NOTE: Go commands can be used if an
operator wants to change settings on the LCt104 and does not want invalid data to be sent to
the master controller. Also if a customer wants
to change baud rate or Mac id, the LCt-104 must
be off line.
NOTE: Upon power up the LCt-104 will attempt
to link to a master host.
13-2
Reset: This command is a hard reset of the
DeviceNet interface. Reset also transpires during
power up.
Go online: This command can be issued from
the LCt-104 to instruct the DeviceNet interface to
initiate communication with a master.
Go offline: This command can be issued from
the LCt-104 to instruct the DeviceNet interface to
stop communication with a master.
Figure 13-2. I/O Menu Changes
13.4.2
Diagnostic Menu
Changes Figure 13-3 presents changes to
the diagnostic menu.Two added features
define DeviceNet errors if they occur and
current online/offline status.
13.4.3
Display Menu Changes
See Figure 13-4 for alarm annunciator changes.
TheDeviceNet selection allows the lower rear
panel network status LED activity to be mirrored
on one of the eight front panel annunciators.
Behavior of this LED isnetwork specific and
defined in Figure 13-4.
Figure 13-3. Diagnostic Menu Changes.
13-3
Figure 13-4. Display Menu Changes
13.5 DATA EXCHANGE FORMATS
LCt-104 DeviceNet input and output data
formats consist of up to 8 bytes each as shown
in Table 13-1, each grouping of two bytes
constitutes one 16-bit word.
Table 13-1. Data Exchange Formats
13.5.1 Produced Data (LCt-104
Transmission)
The input data string is transmitted by the LCt104 tothe requesting master device. Each string
consists of eight bytes and breaks down as
follows:
Byte 1. Message #: Message # is an echo of
the first byte of the output data string (transmitted
by the master). This is used by the master for
data transfer verification.
Byte 2. Input data ID: Data ID code as shown in
Table 13-4.
Bytes 3 & 4. Status: The LCt-104 operating
status, each bit of the word made up of bytes 3
& 4 represents specific operating status.The
descriptions of the bits are in Table 13-2. Bits 0 7are in Byte 3, bits 8 - 15 are in Byte 4.
13-4
Bytes 5 - 8 (Words 3 & 4). Input data: These
two words contain the actual tension value (low
word and then high word). Word 3, low word, is
a 16 bitsigned integer -32768 to 32767 with byte
5 being thelow byte. Word 4, high word, is a 16 bit
signed integertimes 32768 with byte 7 being the
low byte. If word 3 = 2 and word 4 = 1 the total
data value would be 32770 (2+ 32768).
Table 13-2. Status Word Definitions
as well. Byte 2 of the DeviceNet output provides
output data ID code as shown in Table 13-4.
Bytes 3 & 4 (Word 2). Command: This
command word is used by DeviceNet master to
control LCt-104 (as a slave). The meanings of
commands are shown in Table 13-3.
Bytes 5 - 8 (Words 3 & 4). Output Data: The
third and forth words of the DeviceNet output are
low word and high word of the actual download
data.Word 3, low word, is a 16 bit signed integer 32768 to32767. Word 4, high word, is a 16 bit
signed integer times 32768. See example in Inputs
Words 3 & 4 definition. See Table 5 for ID codes
and definitions of writable data.
Table 13-3. DeviceNet Master Command
List
DeviceNet Interface Commands
13.5.2 Consumed Data (LCt-104
Receive)
Output data is transmitted to the LCt-104 by the
requesting master. It consists primarily of
command andID data. ID data is defined in Table
13-4. Each stringconsists of eight bytes and
breaks down as follows:
Byte 1. Message #: Any number between O
and 255 generated by the master and copied by
the LCt-104 into the first byteof the input string.
This is for host data transfer verification.
Byte 2. Output data ID: When the DeviceNet
master issues a download command, it must
include the output data ID and the output data
13-5
Command ID
Description
0
Null Command
1
Switch to Force
2
Switch to Angle
3
Switch to Tension
4
Zero Force Weight
5
Acquire Ref Angle
6
Download Data
7
Clear Status Errors
Data sequence format:
Bytes 5 - 8 (Words 3,7 & 4,8). Input Data: Byte 5
swaps with byte 6 & byte 7 swaps with byte 8.
Bytes 5 - 8 (Words 3,7 & 4,8). Output Data: Byte
5swaps with byte 6 & byte 7 swaps with byte 8.
STANDARD format is Byte 5 low and byte 6
high, byte 7 low and byte 8 high.
SWAPPED format is Byte 5 high and byte 6 low,
byte7 high and byte 8 low.
NOTE: ASCII data and some bit data are not
reversible. Ex. Set point output name... See
register Tables fordetails
Table 13-4. DeviceNet Data Identification Codes
Decimal Hex DeviceNet Data ID Codes
Type
ID Code
System 0
System 1
Operate 2
Operate 3
Operate 4
Arrow K 5
ArrowK 6
Indv K 7
Indv K 8
Indv K 9
Indv K 10
Indv K 11
Indv K 12
Indv K 13
Indv K 14
Indv K 15
Indv K 16
Indv K 17
Indv K 18
Indv K 19
Indv K 20
Indv K 21
Indv K 22
Indv K 23
Indv K 24
Indv K 25
Indv K 26
N/A
27
N/A
28
N/A
29
N/A
30
13-6
Data
0
1
2
3
4
5
6
7
8
9
0A
0B
0C
0D
0E
0F
10
11
12
13
14
15
16
17
18
19
1A
1B
1C
1D
1E
Words Description
Status 1&2 2
Status 3&4 2
Force
2
Tension
2
Angle
2
mV/V vertical 2
mV/V horizon 2
Gross Cell 1 2
Gross Cell 2 2
Gross Cell 3 2
Gross Cell 4 2
Gross cell 1 2
Gross cell 2 2
Gross cell 3 2
Gross cell 4 2
mV/V cell 1 2
mV/V cell 2 2
mV/V cell 3 2
Mv/v cell 4
2
Peak ID11|0B 2
Peak ID12|0C 2
Peak I3|0D 2
Peak I4|0E 2
% load cell 1 1
% load cell 2 1
% load cell 3 1
% load cell 4 1
Spare
1
Spare
1
Spare
1
Spare
1
System status registers 1 & 2 (see description)
System status registers 3 & 4 (see description)
Current Total Force Data
Current Total Tension Data
Current Angle data
mV/V average signal V1 or V1 + V3
mV/V average signal H2 or H2 + H4
Gross data from channel one without crosstalk
Gross data from channel two without crosstalk
Gross data from channel three without crosstalk
Gross data from channel four without crosstalk
Gross data from channel one with crosstalk
Gross data from channel two with crosstalk
Gross data from channel three with crosstalk
Gross data from channel four with crosstalk
mV/V data from channel 1
mV/V data from channel 2
mV/V data from channel 3
mV/V data from channel 4
Peak total channel 1
Peak total channel 2
Peak total channel 3
Peak total channel 4
If one HTU V1, If two HYU's V1
If one HTU H1, If two HYU's V3
If one HTU none, If two HYU's H2
If one HTU none, If two HYU's H4
Spare
Spare
Spare
Spare
can be
swapped
no
no
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
n/a
n/a
n/a
n/a
Table 13-4. DeviceNet Data Identification Codes (cont.)
Decimal Hex DeviceNet Data ID Codes
Type
ID Code
Diag M 31
Diag M 32
Diag M 33
Diag M 34
Diag M 35
Diag M 36
Diag M 37
Diag M 38
Diag M 39
Diag M 40
Diag M 41
Diag M 42
Diag M 43
Diag M 44
Diag M 45
Diag M 46
Diag M 47
Diag M 48
Diag M 49
Diag M 50
Diag M 51
Diag M 52
Diag M 53
Diag M 54
1F
20
21
22
23
24
25
26
27
28
29
2A
2B
2C
2D
2E
2F
30
31
32
33
34
35
36
Diag M 55
37
Filter M 56
Diag M 57
Diag M 58
Teni M 59
Spnt K 60
38
39
3A
3B
3C
13-7
Data
can be
swapped
Spare
n/a
Spare
n/a
Spare
n/a
Spare
n/a
Acquire deadload channel 1
yes
Acquire deadload channel 2
yes
Acquire deadload channel 3
yes
Acquire deadload channel 4
yes
Acquired zero data for channel one
yes
Acquired zero data for channel two
yes
Acquired zero data for channel three
yes
Acquired zero data for channel four
yes
Acquired angle reference
yes
Difference live reference angles
yes
Spare
yes
Spare
yes
7 Digit number in decimal format *
no
3 Digit number in decimal format *
no
6 Digit number in decimal format *
no
Zero data total if Downloaded Zero data
yes
Spare
yes
Zero total limit allowed
yes
Overload total limit allowed (if zero = no overload protection) yes
Spare
yes
Words Description
Spare
1
Spare
1
Spare
1
Spare
1
deadload 1 1
deadload 2 1
deadload 3 1
deadload 4 1
Zero cell 1
2
Zero cell 2
2
Zero cell 3
2
Zero cell 4
2
Angle refer 2
Angle diff
2
Spare
2
Spare
2
Serial number 2
Software ver 1
Ref date
2
Zero total
2
Spare
2
Zero limit
2
Overload limit 2
Spare
1
Filter
1
averaging
Filter band
1
Motion band 1
Motion timer 1
Autowrap
2
Set point 1
2
Filter setting
(off, 1-12 decimal)
Filter setting band (0-off, 1-100 decimal)
Motion setting (off, 1-58 decimal)
Motion timer setting 0-4 sec (0-7 decimal)
off = 0, on=1
Set point one main value
yes
yes
yes
yes
yes
yes
Table 13-4. DeviceNet Data Identification Codes (cont.)
Decimal Hex DeviceNet Data ID Codes
Type
Spnt K
Spnt K
Spnt K
Spnt K
Spnt K
Spnt K
Spnt K
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
Diag M
Diag M
ID Code
61
62
63
64
65
66
67
M 68
M 69
M 70
M 71
M 72
M 73
M 74
M 75
M 76
M 77
M 78
M 79
M 80
M 81
M 82
M 83
M 84
M 85
M 86
M 87
M 88
M 89
M 90
M 91
92
93
Data
3D
3E
3F
40
41
42
43
44
45
46
47
48
49
4A
4B
4C
4D
4E
4F
50
51
52
53
54
55
56
57
58
59
5A
5B
5C
5D
can be
swapped
Set point two main value
yes
Set point three main value
yes
Set point four main value
yes
Set point five main value
yes
Set point six main value
yes
Set point seven main value
yes
Set point eight main value
yes
Infight one value
yes
Infight two value
yes
Infight three value
yes
Infight four value
yes
Infight five value
yes
Infight six value
yes
Infight seven value
yes
Infight eight value
yes
Tag low (4 ASCII char) , { 31-39, 41-5A, 20 & 2D hex) no
Tag high (4 ASCII char)
no
Tag low (4 ASCII char)
no
Tag high (4 ASCII char)
no
Tag low (4 ASCII char)
no
Tag high (4 ASCII char)
no
Tag low (4 ASCII char)
no
Tag high (4 ASCII char)
no
Tag low (4 ASCII char)
no
Tag high (4 ASCII char)
no
Tag low (4 ASCII char)
no
Tag high (4 ASCII char)
no
Tag low (4 ASCII char)
no
Tag high (4 ASCII char)
no
Tag low (4 ASCII char)
no
Tag high (4 ASCII char)
no
User tag 3 digits high (same as set point ASCII)
no
User tag 4 digits low
(same as set point ASCII) no
Words Description
Set point 2 2
Set point 3 2
Set point 4 2
Set point 5 2
Set point 6 2
Set point 7 2
Set point 8 2
Inflight 1 1
Inflight 2 1
Inflight 3 1
Inflight 4 1
Inflight 5 1
Inflight 6 1
Inflight 7 1
Inflight 8 1
Tag id 1 2
Tag id 1 2
Tag id 2 2
Tag id 2 2
Tag id 3 2
Tag id 3 2
Tag id 4 2
Tag id 4 2
Tag id 5 2
Tag id 5 2
Tag id 6 2
Tag id 6 2
Tag id 7 2
Tag id 7 2
Tag id 8 2
Tag id 8 2
User tag 2
User tag 2
Decimal Hex DeviceNet Data ID Codes
Type ID Code
Data
Words Description
can be swapped
Display 94
5E Control data 1
Control data for lower & upper display messaging no
Display 95
5F Upper display 2
Upper display first 4 chars (ASCII) * see note
no
Display 96
60 Upper display 2
Upper display last 3 chars (ASCII)
no
Display 97
61 Lower display 2
Lower display first 4 chars (ASCII)
no
Display 98
62 Lower display 2
lower display last 4 chars (ASCII)
no
13-8
FOR DISPLAY MESSAGING:
REGISTER 94 CONTROL I
f bit 0 = 1 apply data in registers 95&96 to upper display
if bit 1 = 1 apply data in registers 97&98 to lower display
if bit 2 = 1 & bit 0 = 1 flash the upper display
if bit 3 = 1 & bit 1 = 1 flash the lower display
if bit 4 = 1 keep display on until this bit is written again as “0” bits 5-7
are spares, set to zero
bits 8-15 are the display timer, each increment adds 50 msec i.e.
00000001 = 50msec timer; 0000010 = 100 msec timer
Note: For display messaging all following hex code are acceptable.
**30 - 7A (hex) numbers and letters or symbols, also space 20H or minus
2DH**
Note: Messaging will only display if LCt-104 is in operating display mode. (no menu routines)
Table 13-5. DeviceNet Status Registers 1 and 2
DeviceNet Status Register #1
BIT
NAME
0
spare
1
spare
2
spare
3
Lost zero
Checksum error @ power up
4
No mv/v cal
Checksum error @ power up
5
No engineering cal
Checksum error @ power up
6
No temperature cal
Checksum error @ power up
7
EEPROM error
Error writing EEPROM
8
Comm power fault
Serial output - power supply fault
9
spare
10
spare
11
spare
12
Analog #1 open
Open connection
13
Analog #2 open
Open connection
14
Analog #3 open
Open connection
15
Analog #4 open
Open connection
13-9
Definition
DeviceNet Status Register #2
BIT
NAME
Definition
0
A/d overrange channel cell 1
Signal greater than A/D range
1
A/d overrange channel cell 2
Signal greater than A/D range
2
A/d overrange channel cell 3
Signal greater than A/D range
3
A/d overrange channel cell 4
Signal greater than A/D range
4
spare
5
spare
6
spare
7
spare
8
Excitation open channel cell 1
Load cell not connected
9
Excitation open channel cell 2
Load cell not connected
10
Excitation open channel cell 3
Load cell not connected
11
Excitation open channel cell 4
Load cell not connected
12
Excitation Low channel cell 1
Check cell for shorts
13
Excitation Low channel cell 2
Check cell for shorts
14
Excitation Low channel cell 3
Check cell for shorts
15
Excitation Low channel cell 4
Check cell for shorts
Table 13-6. DeviceNet Status Registers 3 and 4
DeviceNet Status Register #3
BIT
NAME
Definition
0
Overload limit cell 1
Cell overload value has been exceeded
1
Overload limit cell 2
Cell overload value has been exceeded
2
Overload limit cell 3
Cell overload value has been exceeded
3
Overload limit cell 4
Cell overload value has been exceeded
4
Zero limit cell 1
Cell zero limit has been exceeded
5
Zero limit cell 2
Cell zero limit has been exceeded
6
Zero limit cell 3
Cell zero limit has been exceeded
7
Zero limit cell 4
Cell zero limit has been exceeded
8
Analog #1 underrange
Weight data below analog output range
9
Analog #1 overrange
Weight data above analog output range
10
Analog #2 underrange
Weight data below analog output range
11
Analog #2 overrange
Weight data above analog output range
12
Analog #3 underrange
Weight data below analog output range
13
Analog #3 overrange
Weight data above analog output range
14
Analog #4 underrange
Weight data below analog output range
15
Analog #4 overrange
Weight data above analog output range
13-10
DeviceNet Status Register #4
B IT
NAME
Definition
0
Output # 1
Set point is on if bit = ' 1 '
1
Output #2
Set point is on if bit = ' 1 '
2
Output #3
Set point is on if bit = ' 1 '
3
Output #4
Set point is on if bit = ' 1 '
4
Output #5
Set point is o n if bit = ' 1 '
5
Output #6
Set point is o n if bit = ' 1 '
6
Output #7
Set point is o n if bit = ' 1 '
7
Output #8
Set point is o n if bit = ' 1 '
8
Input # 1
Input is activated if bit = ' 1 '
9
Input # 2
Input is activated if bit = ' 1 '
10
Input # 3
Input is activated if bit = ' 1 '
11
Input # 4
Input is activated if bit = ' 1 '
12
spare
13
spare
14
spare
15
spare
13.6 DeviceNet EDS FILE
An Electronic Data Sheet (EDS) is a simple file
format that includes the device's configurable
parameters and public interfaces to those
parameters. It provides user-friendly configuration
tools that can be easily updated without having to
constantly revise the configuration software tool.
EDS files are used by network toolsto read or set
device parameters. Table 13-7 presents the
simple EDS file code used for the LCt-104.
Table 13-7. Actual EDS File Code
$ DeviceNet Electronic Data Sheet
$ Electronic Data Sheet generated using SST
EDS Editor
[File]
DescText = “Weight/Rate Transmitter eds
file”;
CreateDate = 11-16-00;
CreateTime = 11:19:02;
ModDate = 01-18-01;
ModTime = 09:48:45;
Revision = 1.0;
[Device]
VendCode = 661;
13-11
VendName = “ BLH”;
ProdType = 12;
ProdTypeStr = “Communication Adapter”;
ProdCode = 1;
MajRev = 1;
MinRev = 1;
ProdName = “LCt-series”;
Catalog = “”;
[IO_Info]
Default = 0x0001;
PollInfo = 0x000D, 1, 1;
COSInfo = 0x000D, 1, 1;
CyclicInfo = 0x000D, 1, 1;
Input1=
8, 0, 0x000D,
“input1”,
2, “61 49”,
“”;
Output1=
8, 0, 0x000D,
“output1”,
2, “61 4F”,
“”;
[ParamClass]
[Params]
[EnumPar]
[Groups]
blhnobel.com
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