NX2A4T-11

NX2A4T-11 Specifications Rev 1.0
Four Channel Modbus TCP/IP Resolver Input Module
Module Overview
The AMCI NX2A4T-11 is a four resolver input module that communicates on Modbus TCP/IP. The four
resolvers connected to this module can be configured as four single turn transducers, two single turn
transducers and one multi turn transducer, or two multi turn transducers.
This unit has two discrete inputs labeled Brake and Preset. The Brake Input is used to capture the
current channel 1 position and the Preset Input is used to Apply the programmed Preset Value to the
channel 1 position data. Both of these inputs can be programmed to act on the 0 to 1 (off to on) and or
the 1 to 0 (on to off) transitions of the inputs. Please note that any changes made to the channel 1
position data by the preset input are not saved through power down. However, Apply Preset operations
performed over the network are saved through power down.
The NX2A4T-11 uses 21 input and 10 output words to communicate on Modbus TCP/IP.
Table of Contents
General Information
2
Installation
Chapter 1
Hardware Overview
Mounting
Resolver Wiring
Resolver Status LEDS
Power Requirements
Input Specifications and LEDs
Network Status LEDs
Setting the Ethernet Address
Configuring a Modbus TCP/IP System
3
3
3
4
6
6
7
7
8
8
Programmable Parameters
Chapter 2
Apply Preset
Count Direction
Transducer Fault Latch
Tachometer Response
Resolver Type
Channel LED Enable
Input Configuration
Full Scale Count
Linear Offset
Preset Value
Transducer Type
Number of Turns
12
12
12
12
12
13
13
13
14
14
14
15
15
Input Registers
Chapter 3
16
Output Registers
Chapter 4
Programming Cycle
19
21
20 Gear Drive, Plymouth Industrial Park, Terryville, CT 06786
Tel: (860) 585-1254 Fax: (860)584-1973 E-mail: Sales @amci.com
page: 1
NX2A4T-11 Specifications Rev 1.0
Four Channel Modbus TCP/IP Resolver Input Module
General Information
Important User Information
The products and application data described in this manual are useful in a wide variety of different
applications. Therefore, the user and others responsible for applying these products described herein are
responsible for determining the acceptability for each application. While efforts have been made to
provide accurate information within this manual, AMCI assumes no responsibility for the application or
the completeness of the information contained herein. Throughout this manual the following two notices
are used to highlight important points.
WARNINGS tell you when people may be hurt or equipment may be damaged if the procedure is not followed
properly.
CAUTIONS tell you when equipment may be damaged if the procedure is not followed properly. No patent liability
is assumed by AMCI, with respect to use of information, circuits, equipment, or software described in this manual.
The information contained within this manual is subject to change without notice. UNDER NO CIRCUMSTANCES
WILL ADVANCED MICRO CONTROLS, INC. BE RESPONSIBLE OR LIABLE FOR ANY DAMAGES OR
LOSSES, INCLUDING INDIRECT OR CONSEQUENTIAL DAMAGES OR LOSSES, ARISING FROM THE
USE OF ANY INFORMATION CONTAINED WITHIN THIS MANUAL, OR THE USE OF ANY PRODUCTS
OR SERVICES REFERENCED HEREIN.
Standard Warranty
ADVANCED MICRO CONTROLS, INC. warrants that all equipment manufactured by it will be free from defects,
under normal use, in materials and workmanship for a period of [18] months. Within this warranty period, AMCI
shall, at its option, repair or replace, free of charge, any equipment covered by this warranty which is returned,
shipping charges prepaid, within 18 months from date of invoice, and which upon examination proves to be defective
in material or workmanship and not caused by accident, misuse, neglect, alteration, improper installation or improper
testing. The provisions of the “STANDARD WARRANTY” are the sole obligations of AMCI and excludes all other
warranties expressed or implied. In no event shall AMCI be liable for incidental or consequential damages or for
delay in performance of this warranty.
Returns Policy
All equipment being returned to AMCI for repair or replacement, regardless of warranty status, must have a Return
Merchandise Authorization number issued by AMCI. Call (860) 585-1254 with the model and serial numbers along
with a description of the problem. A “RMA” number will be issued. Equipment must be shipped to AMCI with
transportation charges prepaid. Title and risk of loss or damage remains with the customer until shipment is received
by AMCI.
24 Hour Technical Support Number
Technical Support, in the form of documents, FAQs, and sample programs, is available from our website,
www.amci.com. 24 Hour technical support is also available on this product. For technical support, call (860) 5837271. Your call will be answered by the factory during regular business hours, Monday through Friday, 8AM - 5PM
EST. During non-business hours, an automated system will ask you to leave a detailed message and the telephone
number that you can be reached at. The system will page an engineer on call. Please have your product model
number and a description of the problem ready before you call.
20 Gear Drive, Plymouth Industrial Park, Terryville, CT 06786
Tel: (860) 585-1254 Fax: (860)584-1973 E-mail: Sales @amci.com
page: 2
NX2A4T-11 Specifications Rev 1.0
Four Channel Modbus TCP/IP Resolver Input Module
Chapter 1: Installation
NX2A4T-11 Hardware Overview
Resolvers 1 and
2 connector
Resolver
1/2
Resolver Status
LEDs
Input Status
LEDs
12345678
1
R1 R2 R3 R4
RS485
Network
Status LEDs
12345678
Input
Status
1
2
Resolvers 3 and
4 connector
Resolver
3/4
Power
1234
2
Brake/Preset
10 – 30 VDC
Power
Connector
123
+ - GND
24 VDC
3
4
Switches for Node
Address and Baud
Rate
Pin 1
RJ45 Modbus
TCP/IP Connector
Input Connector
(On the NX2A4T-11, the
brake input has been replaced
by a capture input.)
Dimensions:
Length = 5.75 inches, Height = 3 inches, Width = 3.76 inches
Mounting
The NX2A4T-11 can be panel mounted in two ways, either on a DIN rail or panel mounted. The
mounting kit, included with the unit, contains two DIN brackets, two panel brackets, and four #8 screws
needed to attach your choice of brackets to the NX2A4T-11. Note that the enclosure is not sealed and
the NX2A4T-11 must be installed in an adequate enclosure to protect it from environmental
contaminates.
Attaching the DIN Brackets
The following figure shows how to install the DIN brackets so that the NX2A4T-11 can be mounted on
EN 50 022 or EN 50 035 rail. Note that the bottom view of the unit is shown. The rear view is similar
and the brackets are installed in the same fashion.
20 Gear Drive, Plymouth Industrial Park, Terryville, CT 06786
Tel: (860) 585-1254 Fax: (860)584-1973 E-mail: Sales @amci.com
page: 3
NX2A4T-11 Specifications Rev 1.0
Four Channel Modbus TCP/IP Resolver Input Module
Attaching the Panel Brackets
The following figure shows how to install the panel brackets so that the NX2A4T-11 can be securely
mounted to an enclosure. Note that the bottom view of the unit is shown. The rear view is similar and the
brackets are installed in the same fashion.
Resolver Transducer Connections
The four resolvers connected to this module can be configured as four single turn transducers, two single
turn transducers and one multi turn transducer, or two multi turn transducers. The Transducer Input
Connectors, labeled “RESOLVER 1/2” and “RESOLVER 3/4” have eight contacts. The mating
connectors are supplied with the NX2A4T-11. The AMCI part number for the mating connector is MS-8,
while the Phoenix Contact part number is MSTB2.5/8-ST-5.08, order number 1757077.
The RESOLVER 1 / 2 connector is used for connecting to Single turn Transducers channels 1 and 2 or
Multi turn Transducers channel 1. The RESOLVER 3 / 4 connector is used for connecting to Single turn
Transducers channels 3 and 4 or Multi turn Transducers channel 2.
The following table shows the connections between the NX2A4T-11 and the various resolver
transducers that AMCI offers.
Pin Number
1
2
3
4
5
6
7
8
Resolver Connectors
Single turn Function
Multi turn Function
R1 both channels
R1
R2 both channels
R2
Shields
Shields
S1 & S2 both channels
S3F, S2F, S1C, S2C
S4 channel 1
S3C
S3 channel 1
S4C
S4 channel 2
S1F
S3 channel 2
S4F
Note: The reference voltage signal, R1 and R2, of both connectors, is common.
Pre made cables are available from AMCI. These cables come with a Bendix connector that mates with
the resolver transducer. The other end is pigtailed at the factory for easy connection to the MS-8
connector included with the NX2A4T-11. These cables have a part number of CTL-X for single turn
transducers and CML-X for the multiturn transducers. In both cases, X equals the length in feet.
The following three diagrams show how to wire the CTL-X and CML-X cables to the NX2A4T-11.
20 Gear Drive, Plymouth Industrial Park, Terryville, CT 06786
Tel: (860) 585-1254 Fax: (860)584-1973 E-mail: Sales @amci.com
page: 4
NX2A4T-11 Specifications Rev 1.0
Four Channel Modbus TCP/IP Resolver Input Module
One Single turn Transducer Cable
Two Single turn Transducer Cable
One Multi turn Transducer Cable
20 Gear Drive, Plymouth Industrial Park, Terryville, CT 06786
Tel: (860) 585-1254 Fax: (860)584-1973 E-mail: Sales @amci.com
page: 5
NX2A4T-11 Specifications Rev 1.0
Four Channel Modbus TCP/IP Resolver Input Module
Wiring Notes:
•
•
•
•
•
•
•
Resolver signals are low voltage, low power signals. It can be installed in conduit along with
other low power cabling such as communication cables and low power ac/dc I/O lines. It cannot
be installed in conduit with ac power lines or high power ac/dc I/O lines.
AMCI recommends the use of either the Beldin 9873 or 9730 or equivalent cables to connect the
resolver to the NX2A4T-11 module. While the Beldin 9730 can be used for any length of cable
run, the 9783 can only be used for runs less than 100 feet.
To reduce or eliminate the influence of electrical noise on the system, the resolver cable shields
must be connected to shield pin 3. The shields pins on the Transducer Input Connectors are
brought to the Chassis Ground pin on the power supply connector.
The shields must be connected to only one end of the cable run and treated as conductors at any
junctions. Do not ground the shields at the junction box.
If electrical noise is causing your resolver counts to jump, try running a heavy wire from the
power connectors Chassis Ground pin to your earth ground bus. This will provide a better low
impedance path to ground.
If the resolver cable must cross power feed lines, it should do so at right angles.
Route the cable at least five feet from high voltage enclosures, or sources of “rf” radiation.
Resolver Status LEDs
The following table describes the function of the four resolver status LEDs.
1 = Resolver 1, 2= Resolver 2, 3 = Resolver 3, 4 = Resolver 4
LED Pattern
off
solid green
flashing green
flashing red
solid red
Function
LED Disabled
Resolver OK
Clearable Transducer Fault
Non Clearable Transducer Fault
Module Fault
Power Requirements
Power Connector
Pin
Function
1
+24Vdc
2
DC Common
3
Chassis Ground
Note: The Chassis Ground Pin is connected to the
NX2A4T-11’s body and must be connected to your
earth ground bus for proper module operation.
The Nexus Module requires 500mA of current @24Vdc to operate.
New Position Update Time
200 microseconds
Tachometer Resolution and Range
Resolution: 1 RPM
Range: 1 to 5000 RPM
20 Gear Drive, Plymouth Industrial Park, Terryville, CT 06786
Tel: (860) 585-1254 Fax: (860)584-1973 E-mail: Sales @amci.com
page: 6
NX2A4T-11 Specifications Rev 1.0
Four Channel Modbus TCP/IP Resolver Input Module
Input Function and Status LEDs
The NX2A4T-11 has two discrete inputs labeled Brake and Preset. The Brake Input is used to capture
the current channel 1 position and the Preset Input is used to Apply the programmed Preset Value to the
channel 1 position data. The inputs are bipolar. Connecting one of the inputs pins to +Vdc and the other
to the power supply common will cause the input to activate.
Logic 0 = 0 to 2Vdc
Logic 1 = 10 to 30Vdc
10mA minimum current required to activate the input
Input Connector
Pins
Function
Brake /
1 to 2
Capture Input
3 to 4
Preset Input
Input LED Active State
LED Color
Pin 1 or 3 = Vdc
Red
Pin 2 or 4 = Common
Pin 2 or 4 = Vdc
Green
Pin 1 or 3 = Common
The following figure shows the pin out and simplified schematic of the Brake (Capture) Input. The
schematic of the Preset input is identical.
Both of these inputs can be programmed to act on the 0 to 1 (off to on) and or the 1 to 0 (on to off)
transitions of the inputs. Please note that any changes made to the channel 1 position data by the preset
input are not saved through power down.
20 Gear Drive, Plymouth Industrial Park, Terryville, CT 06786
Tel: (860) 585-1254 Fax: (860)584-1973 E-mail: Sales @amci.com
page: 7
NX2A4T-11 Specifications Rev 1.0
Four Channel Modbus TCP/IP Resolver Input Module
Modbus TCP/IP Ethernet Status LEDs
The following table describes the function of the four network status LEDs.
LED
Number
1
2
Name
Network
Status
Module
Status
3
Activity
4
Link
LED Pattern
Function
Flashing Green with
2 seconds interval
This LED indicates the number of established Modbus/TCP
connections to the module. The number of connections is equal
to the number of flashes on this LED.
Flashing Green/Red
Power-on self test
Steady Off
No Power
Steady Green
The module is operating correctly
Flashing Green
The module has not been initialized
Flashing Red
Minor recoverable fault
Steady Red
Major internal error
Flashing Green/Red
Power-on self test
This LED flashes green each time a packet is received or
transmitted
This LED indicates that the module is connected to an Ethernet
network
Flashing Green
Steady Green
Ethernet IP Address
The NX2A4T-11 has a default IP address of 192.168.000.XXX where “XXX” can be any number
between 1 and 254.
Every Ethernet IP unit, including those made by AMCI, has a unique MAC ID number. This number is
located directly below the label on the side of the unit and identifies the unit to the Ethernet Network.
If you have a computer running a BOOTP server, you can use this MAC ID address to change the unit’s
IP address. After changing the IP address, you must cycle power to the NX2A4T-11 to make the
changes to the IP address take affect.
The DIP switches will no longer have any function after you have changed the IP address.
Ethernet Address Selection using the DIP switches
The NX2A4T-11 uses an IP address of 192.168.000.XXX where “XXX” can be any number between 1
and 254. Eight dip switches on the NX2A4T-11 are used to set the “XXX” portion of the address.
Switch 8, the left most switch, is the least significant bit and switch 1, the right most switch, is the most
significant bit. The address is programmed using the following procedure.
1. Determine the address of the NX2A4T-11. It can be any unused address between 1 and 254.
2. Convert the address to a binary number. A value of 50 will be 0011 0010.
3. Enter the address on the dip switches. Continuing the above example, switches 8, 6, 5, 2 and 1
will be off (down) and switches 7, 4, and 3 will be on (up).
20 Gear Drive, Plymouth Industrial Park, Terryville, CT 06786
Tel: (860) 585-1254 Fax: (860)584-1973 E-mail: Sales @amci.com
page: 8
NX2A4T-11 Specifications Rev 1.0
Four Channel Modbus TCP/IP Resolver Input Module
Setup Example
AMCI NX2A4T-11 to Group Schneider’s 140 NOE 771 01 module
This setup example assumes that the 140 NOE 771 01 module has already been installed in the PLC
system.
1.
2.
3.
4.
5.
With power removed, use the dip switches to set the IP address of the NX2A4T-11.
Open an existing or create a new Unity program.
Open the Project Browser and click on the + symbol next to Communication.
Click on the + symbol next to Networks to show the available networks.
If you are creating a new network for the NX2A4T-11, right click on Networks and select New
Network from the window that appears. If you are adding the NX2A4T-11 to an existing
network, ignore this step.
Click on the down arrow to the right of the List of available Networks field and select Ethernet
from the drop down menu that appears.
Type the new networks name in the Change Name field
Click on OK to create the new network.
6. Right click on the existing network and select open from the window that appears. The
following window will appear.
20 Gear Drive, Plymouth Industrial Park, Terryville, CT 06786
Tel: (860) 585-1254 Fax: (860)584-1973 E-mail: Sales @amci.com
page: 9
NX2A4T-11 Specifications Rev 1.0
Four Channel Modbus TCP/IP Resolver Input Module
7. Enter the following parameters.
Module Family:
Module Address:
IP Address:
Subnet Mask:
TCP/IP 10/100 Regular Connection
Location of the 140 NOE 771 01 module
The TCP/IP address of the 140 NOE 771 01 module
255.255.255.000
8. Click on the I/O scanning tab. The following screen will appear.
9. Enter the following parameters.
Slave IP Address:
Unit ID:
Health Timeout:
Repetitive Rate:
RD Master Object.
RD Slave Index:
RD Length:
Last Value (input):
WR Master Object:
WR Slave Index:
WR Length:
Description:
IP Address of the NX2A4T-11 module.
Not necessary for the NX2A4T-11 module. The default value of 255
can remain.
Timeout value measured in ms. Can be any value for the NX2A4T-11
module
Update time of the NX2A4T-11 in ms. A value of zero will result in the
fastest transfer of data between the NX2A4T-11 and the NOE
module. A value other than zero must be in a multiple of 16.
First destination address register where the data transmitted from the
NX2A4T-11 will be located.
Must be 0.
Must be set to 21. (The NX2A4T-11 uses 21 16 bit input words)
Status of the input registers, either last state or zero, in the event of an
error. The data from the NX2A4T-11 will remain in the registers if
communications are lost.
First source address register location where the data sent from the PLC
to the NX2A4T-11 is located.
Must be set to 1024
Must be set to 10 (The NX2A4T-11 uses 10 16 bit output words)
Your choice of text or leave blank.
20 Gear Drive, Plymouth Industrial Park, Terryville, CT 06786
Tel: (860) 585-1254 Fax: (860)584-1973 E-mail: Sales @amci.com
page: 10
NX2A4T-11 Specifications Rev 1.0
Four Channel Modbus TCP/IP Resolver Input Module
10.
11.
12.
13.
14.
15.
16.
17.
18.
19.
20.
Close the network.
Click on Yes when asked “Do you want to save your modifications?”
Click on Yes when asked “Do you Confirm the Modification?”
On the Project Tree, expand the I/O configuration by clicking on the + symbol to the left of
Configuration.
Further expand the I/O configuration by clicking on + symbol to the left of the Local Bus.
Continue to expand the I/O configuration by clicking on the + symbol to the left of the Local
Quantum Drop.
Continue to expand the I/O configuration by clicking on + symbol to the left of the rack that
contains the 140 NOE 771 01 module.
Expand the networks attached to the NOE module by clicking on the + symbol to the left of the
140 NOE 771 01 module.
Right click on the network associated with the 140 NOE 771 01 module and select OPEN from
the window that appears.
Click on the down arrow on the field just below where it asks you to “Please choose a Network.”
Select the network that was created above.
Save and build the project, and download it to the PLC. If the NX2A4T-11 is powered up and
attached to the network, network LED 3 (the upper right network status LED) should now be
flashing and network LED 4 (the lower right network status LED) should now be on solid.
20 Gear Drive, Plymouth Industrial Park, Terryville, CT 06786
Tel: (860) 585-1254 Fax: (860)584-1973 E-mail: Sales @amci.com
page: 11
NX2A4T-11 Specifications Rev 1.0
Four Channel Modbus TCP/IP Resolver Input Module
Chapter 2: Programmable Parameters
You configure your unit by setting the values of its Programmable Parameters. These parameters are
stored in nonvolatile memory. Therefore, there is no need to configure the NX2A4T-11 after every power
up. The nonvolatile memory is an EEPROM that is rated for approximately 100,000 write cycles.
Apply Preset
There are four Apply Preset bits, one for each channel. Setting one of these bits while programming the
NX2A4T-11 module will cause the channel’s current position data to be changed to the programmed
Preset value. The result of the Apply Preset operation is saved through power down.
Note: Programming a channel’s setup data will undo the result of an Apply Preset operation.
Count Direction
This parameter sets the direction of transducer shaft rotation that increases the position count. If the
transducer is wired as specified in this manual and the count direction is set to positive, the count will
increase with clockwise rotation, (looking at the shaft). If the count direction is set to negative, the
position count will increase with counter-clockwise rotation.
The default Count Direction Value is positive.
Note: It is also possible to reverse the count direction by reversing S2 S4 wire pairs in the transducer
cable. If you are designing the NX2A4T-11 into an older system, it is possible that your drawings
already have the pairs reversed and you may not need to set this parameter. Once the machine is
setup, you can easily change this parameter if the position is increasing in the wrong direction.
Transducer Fault Latch
Normally, a transducer fault is latched by the NX2A4T-11. Transducer faults can be caused by improper
wiring, electrical noise, or a damaged transducer. When the unit detects a fault condition, it reports this
fault over the network until a Clear Errors command is issued to it. If you have a situation where
electrical noise is causing spurious transducer faults that you can safely ignore, you can disable the
Transducer Fault Latch and force the NX2A4T-11 to clear a fault as soon as possible. Note that an
intermittent wiring problem may also cause spurious faults. If you want to reliably capture these transient
faults, then you must leave the Transducer Fault Latch enabled because the NX2A4T-11 can detect and
clear transducer faults much faster than the network scans the unit.
The default Transducer Fault Latch value is enabled.
Tachometer Response
This parameter sets the time between tachometer updates. It only affects the update time of the
tachometer. It does not affect the update time of the position value, which is always 200 microseconds.
The default Tachometer Response is 120 milliseconds.
The Tachometer Response can be set to 120 or 24 milliseconds.
20 Gear Drive, Plymouth Industrial Park, Terryville, CT 06786
Tel: (860) 585-1254 Fax: (860)584-1973 E-mail: Sales @amci.com
page: 12
NX2A4T-11 Specifications Rev 1.0
Four Channel Modbus TCP/IP Resolver Input Module
Resolver Type
The Resolver Type parameter allows you to use the NX2A4T-11 with Autotech transducers. Unlike the
other NX2A4T-11 parameters, the Resolver Type parameter only exists on channel 1 because this
parameter affects all channels.
The default Resolver Type value is AMCI.
Note
1.
2.
3.
4.
5.
AMCI has bolt-in replacements for most Autotech transducers and we strongly suggest using
them in place of Autotech transducers whenever possible.
You can bring both AMCI and Autotech single-turn resolvers into one unit. Set the Resolver
Type to AMCI and install a RM-3 to interface the Autotech transducers.
You can bring AMCI single-resolver transducers into a NX2A4T-11 with an Autotech multi-turn
transducer. Set the Resolver Type to Autotech and install an RM-3 Reference Module to interface
the AMCI transducers.
You cannot bring AMCI and Autotech multi-turn transducers into one unit.
For more information on interfacing with Autotech transducer, see the AMCI’s FAQ,“Using
Transducers From Other Manufacturers”, posted on our website, www.amci.com.
Channel LED Enable
This bit level parameter allows you to enable or disable the resolver status LEDs. This parameter is
useful if you do not want the NX2A4T-11 to display resolver errors on channels that are not being used
in your application.
The default state of the channel 1 resolver status LED is enabled
The default state of the channel 2 through 4 resolver status LEDs is disabled.
Input Configuration
The NX2A4T-11 has two inputs labeled Brake and Preset. The Brake input is used to capture the current
channel 1 position data and the Preset input changes the channel 1 position data to the channel 1 Preset
Value.
However, before either of these inputs can be used, the transition on which these operations occur must
be programmed with the channel 1 setup data. Each input has two programming bits. One determines if
the input will activate on the 0 to 1 (off to on) transition and the other determines if the input will
activate on the 1 to 0 (on to off) transition. It is possible to set both of these bits so that the input is acted
on both the 0 to 1 and 1 to 0 transition of the input. If both of these programming bits are reset, the
NX2A4T-11 will ignore any transitions on the input.
The default Input Configuration is disabled.
20 Gear Drive, Plymouth Industrial Park, Terryville, CT 06786
Tel: (860) 585-1254 Fax: (860)584-1973 E-mail: Sales @amci.com
page: 13
NX2A4T-11 Specifications Rev 1.0
Four Channel Modbus TCP/IP Resolver Input Module
Full Scale Count
The Full Scale Count specifies the total number of counts generated by the NX2A4T-11. In the case of
single turn transducers, it is the total number of counts over the one turn. In the case of multi turn
transducers, it is the total number of counts over the programmed Number of Turns.
For All Single-Resolver Transducers
The default Full Scale Count is 8,192.
Range is 2 to 8,192. Setting the Full Scale Count to 360 gives 1 degree resolution.
For AMCI Multi turn Transducers
Default value is (Number of Turns * 4,096) if Transducer Type equals 100 or 180
Default value is (Number of Turns * 409.6) if Transducer Type equals 1,000 or 1,800
Range is 2 to (Default Value)
For Autotech Multi turn Transducers (Transducer Type equals 128)
Default value is (Number of Turns parameter) * 1,024
Range is 2 to (Default Value)
Linear Offset
The Linear Offset parameter changes the range of count values output by the unit and is used when the
transducer position directly correlates to a linear measurement that does not start at zero. One such
example is an overhead crane. Another example is a press shut height measurement. As an example of
how the Linear offset works, when the Full Scale Count is set to 1,500 and the Linear Offset is set to
zero, the NX2A4T-11 will output position values from 0 to 1,499. If the Linear Offset is changed to 100,
then the unit will then output values from 100 to 1,599.
The default Linear Offset is zero.
For single-turn channels, the range of the Linear Offset is 0 to (32,767 – Full Scale Count).
For multi-turn transducers, the range of the Linear Offset is 0 to 999,999.
Preset Value
The Preset Value parameter allows you to set the value of the position data to any count value within its
range. The range of the count values is (Linear Offset) to (Linear Offset + (Full Scale Count - 1)). When
the Linear Offset equals zero, this translates into 0 to (Full Scale Count -1). Programming the Preset
Value does not change the position data, it only sets the value that the position will change to when an
Apply Preset Command (or when the Preset Input is used on channel 1) is initiated.
The default Preset Value is equal to the Linear Offset, which is typically zero. Programming the
Linear Offset resets the Preset Value to equal it.
The Preset Value range is (Linear Offset) to (Linear Offset + (Full Scale Count - 1)). When the
Linear offset equals zero, this reduces to 0 to (Full Scale Count -1)
20 Gear Drive, Plymouth Industrial Park, Terryville, CT 06786
Tel: (860) 585-1254 Fax: (860)584-1973 E-mail: Sales @amci.com
page: 14
NX2A4T-11 Specifications Rev 1.0
Four Channel Modbus TCP/IP Resolver Input Module
Transducer Type
(Multi turn Transducer Parameter Only)
The Transducer Type parameter exists for multi-turn transducers only. If a channel is programmed to be
used with a single-resolver transducer, then this parameter does not exist for that channel. The
Transducer Type parameter defines the type of multi-turn transducer attached to the channel. The
NX2A4T-11 needs this information in order to decode the multi-turn position correctly. This parameter
also defines the values that can be programmed into the Number of Turns parameter.
If the Resolver Type parameter is set to AMCI, the Transducer Type parameter can be set to 100,
180,1,000, or 1,800.
If the Resolver Type parameter is set to Autotech, the Transducer Type parameter must be set to
128.
Number of Turns
(Multi turn Transducer Parameter Only)
The maximum number of turns a multi-turn transducer can encode is fixed by the gearing inside of it.
However, the NX2A4T-11 has the ability to divide this maximum number of turns into smaller multi-turn
cycles. The unit does this without loss of absolute position within the smaller cycle. For example, the 180
turn mechanical cycle of an HTT-20-180 can be broken down into three electronic cycles of sixty turns
each. The 180 turn cycle could also be broken down into sixty cycles of three turns each.
The range of values for the Number of Turns parameter is dependent on the value of the Transducer
Type parameter.
When Transducer Type = 100: Number of Turns is programmable to 1, 2, 4, 5, 10, 20, 25, 50, or
100.
When Transducer Type = 180: Number of Turns is programmable to 1, 2, 3, 4, 5, 6, 9, 10, 12,
15, 18,20, 30, 36, 45, 60, 90, or 180.
When Transducer Type = 1,000: Number of Turns is programmable to 10, 20, 40, 50, 100, 200,
250,500, or 1,000.
When Transducer Type = 1,800: Number of Turns is programmable to 10, 20, 30, 40, 50, 60,
90, 100,120, 150, 180, 200, 300, 360, 450, 600, 900, or 1,800.
When Transducer Type = 128: Number of Turns is programmable to 1, 2, 4, 8, 16, 32, 64, or
128.
20 Gear Drive, Plymouth Industrial Park, Terryville, CT 06786
Tel: (860) 585-1254 Fax: (860)584-1973 E-mail: Sales @amci.com
page: 15
NX2A4T-11 Specifications Rev 1.0
Four Channel Modbus TCP/IP Resolver Input Module
Chapter 3: Input Registers (Data sent from the NX2A4T-11 module to the network)
The following table shows the input data format for the NX2A4T-11 module.
Word
Number
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Single turn Transducers
Channel 1 Status
0
Channel 1 Position
Channel 1 Velocity
Channel 2 Status
0
Channel 2 Position
Channel 2 Velocity
Channel 3 Status
0
Channel 3 Position
Channel 3 Velocity
Channel 4 Status
0
Channel 4 Position
Channel 4 Velocity
0
Channel 1 Capture Value
0
0
0
Multi turn
Transducers
Channel 1 Status
Channel 1 upper 3 digits position
Channel 1 lower 3 digits position
Channel 1 velocity
0
0
0
0
Channel 2 Status
Channel 2 upper 3 digits position
Channel 2 lower 3 digits position
Channel 2 velocity
0
0
0
0
Channel 1 Upper Capture Value
Channel 1 Lower Capture Value
0
0
0
Status Word Layout
Bit
12
Bit
11
Bit
10
Bit
09
Bit
08
Bit
07
Bit
06
Bit
05
Bit
04
Bit
03
Acknowledge bit (ch 1 only)
Module Fault
Transducer Fault Bit
Preset Input Status (ch 1 only)
Capture Input Status (ch 1 only)
Resolver Type
(0=single, 1=multi turn)
Velocity at zero
Motion Direction
(0=increasing, 1=decreasing)
Message Ignored
Command Error
Preset Value Error
Linear Offset Error
Full Scale Count Error
20 Gear Drive, Plymouth Industrial Park, Terryville, CT 06786
Tel: (860) 585-1254 Fax: (860)584-1973 E-mail: Sales @amci.com
Bit
02
Bit
01
Bit
00
Configuration Error
Bit
13
Transducer Type Error
Bit
14
Number of Turns Error
Bit
15
page: 16
NX2A4T-11 Specifications Rev 1.0
Four Channel Modbus TCP/IP Resolver Input Module
Configuration Error: Set if any of the unused bits in the configuration word are set. This bit will also be
set if the Capture and Preset input transition types are programmed on channels 2
through 4.
Transducer Type Error: Multi turn Transducer Programming Error only. This bit is set if the transducer
type is not equal to 100, 180, 1000, or 1800 if the module is configured for
AMCI transducers, or 128 if the module is configured for Autotech transducers.
This bit will always be reset when the module is being used as a single turn
resolver.
Number of Turns Error: Multi turn Transducer Error only. This bit is set if the number of turns is invalid
for the transducer type selected. This bit will always be reset when the module is
being used as a single turn resolver.
Full Scale Count Error: Set if the Full Scale Count is outside of the range of:
2 to 8192 for Single turn transducers
2 to (4096 * Number of Turns) for 100 or 180 turn transducer
2 to (409.6 * Number of Turns) for 1000 or 1800 turn transducer
2 to (1024 * Number of Turns) for an Autotech 128 turn transducer
Linear Offset Error: Set if the linear offset is outside of the range of:
0 to (32767 - Full Scale Count) for single turn transducers
0 to 999,999 for multi turn transducers
Preset Value Error: Set if the preset value is outside of the range of Linear Offset to (Linear Offset -(Full
Scale Count -1))
Command Error: Set if any of unused bits in the command word are set, if you try to program a channel
that is not present, if you try to program more than one channel at a time, or if you
attempt to preset single channels 2 or 4 if they have been configured as multiturn
channels.
Message Ignored: Set if an attempt is made to program a parameter if an error already exits on a
different parameter. This bit will also be set if you use the Apply Preset command
(including the Preset Input) on a channel that is in transducer fault.
Motion Direction: This bit will be “0” if the counts are increasing, or “1” if the counts are decreasing.
The bit will remain in its last state when there is no motion.
Velocity at Zero: This bit will be set if there has been no motion for 125ms.
Resolver Type: This bit will be reset if the input channel is configured to be used with single turn
transducers, and set if the input channel is configured to be used with multi turn
transducers.
Capture Input Status: This bit will be set if power is applied to the Capture Input. This bit is present only
in the channel 1 status data and shows the state of the Capture Input even if the
input’s transition type has not been programmed in the Configuration word.
Preset Input Status: This bit will be set if power is applied to the preset input. This bit is present only in
the channel 1 status data and shows the state of the Preset Input even if the input’s
transition type has not been programmed in the Configuration word.
Transducer Fault: This bit will be set if a transducer Fault has been detected.
Module Fault: Set if there is a module fault, such as an EEPROM error.
Acknowledge Bit: Set when the Transmit bit is set in output word 0. This bit is present only in the
channel 1 status data.
20 Gear Drive, Plymouth Industrial Park, Terryville, CT 06786
Tel: (860) 585-1254 Fax: (860)584-1973 E-mail: Sales @amci.com
page: 17
NX2A4T-11 Specifications Rev 1.0
Four Channel Modbus TCP/IP Resolver Input Module
Position Data: This register shows the current position data from the resolver transducer. This register
will count from 0 to (Full Scale Count –1). If the resolver transducer continues to rotate
in the same direction, the count value will then roll over to zero and start counting again.
The position data is updated every 200 microseconds.
Velocity Data: This register shows the current rate of change of the position data and has units of
Revolutions/Minute. The velocity data is updated every 120 or 24ms, depending on the
channel’s configuration.
Capture Value: Only the Channel 1 position data can be captured on either the 0 to 1 and or the 1 to 0
transition of the Capture Input. (This input is labeled as the brake input on the front of
the NX2A4T-11.) The capture value will remain in the register until one of the
following has occurred.
•
•
•
•
A new capture value is detected.
The module is programmed, including sending the Apply Preset command to any of
the channels.
The Preset Input has been configured and is activated.
The NX2A4T-11’s power is cycled.
Input Data Notes
1. It is possible to configure the module for one Multi turn and two Single turn transducers at the same
time. If channel 1 is used for the Multi turn input, than the channel 1 and 2 Single turn data is
replaced by the channel 1 Multi turn data. However, the channel 3 and 4 single turn data will remain.
If the channel 2 Multi turn is used, than the channel 3 and 4 Single turn data is replaced by the
channel 2 Multi turn data, and the channel 1 and 2 Single turn data remains. It is not necessary to use
the channel 1 Multi turn data before using the channel 2 Multi turn data.
2. If the module is configured to work with Multi turn transducers, programming either of the Single
turn channels associated with the Multi turn channel will replace the Multi turn channel data with the
data of both Single turn channels. For example if Multi turn channel 1 is being used, and Single turn
channel 2 is programmed, than single turn channel 1 and channel 2 data will replace Multi turn
channel 1 data in the input registers.
3. The data in the input registers remains in its last state if the Nexus module is removed from the
network.
20 Gear Drive, Plymouth Industrial Park, Terryville, CT 06786
Tel: (860) 585-1254 Fax: (860)584-1973 E-mail: Sales @amci.com
page: 18
NX2A4T-11 Specifications Rev 1.0
Four Channel Modbus TCP/IP Resolver Input Module
Chapter 4: Output Registers (Data sent from network to the NX2A4T-11)
The format of the output data is shown in the following table. Please note that only one channel can be
programmed at a time. However, the position of more than one channel can be preset, and a channel
programmed, with one write operation.
Word
Number
0
1
2
3
4
5
6
7
8
9
Single
Resolver
Transducers
Control
Configuration
0
Full Scale Count
0
Linear Offset
0
Preset
0
0
Multi turn Transducers
Control
Configuration
Upper 3 Digits Full Scale Count
Lower 3 Digits Full Scale Count
Upper 3 Digits Linear Offset
Lower 3 Digits Linear Offset
Upper 3 Digits Preset Value
Lower 3 Digits Preset Value
Transducer Type
Number of Turns
Control Word Function
Bit
09
Bit
08
Bit
07
Bit
06
Bit
05
Bit
04
Bit
03
Bit
02
Bit
01
Bit
00
Program Single turn channel 1
Apply Preset channel 4
Apply Preset channel 3
(Single or Multi turn)
Apply Preset channel 2
Apply Preset channel 1
(Single or Multi turn)
Bit
10
Program Single turn channel 2
Bit
11
Program Single turn channel 3
Clear Errors
Bit
12
Program Single turn channel 4
Transmit Bit
Bit
13
Program Multi turn channel 1
Bit
14
Program Multi turn channel 2
Bit
15
20 Gear Drive, Plymouth Industrial Park, Terryville, CT 06786
Tel: (860) 585-1254 Fax: (860)584-1973 E-mail: Sales @amci.com
page: 19
NX2A4T-11 Specifications Rev 1.0
Four Channel Modbus TCP/IP Resolver Input Module
Configuration Word Function
Bit
08
Capture Input Falling (channel 1 only)
Enable Channel LED (0=disable, 1=enable)
Bit
07
Bit
06
Bit
05
Bit
04
Bit 03
Bit
02
Bit
01
Bit
00
Direction (0=Cw, 1=CCW increasing)
Bit
09
Transducer Fault Latch (0=yes, 1=no)
Bit
10
Tachometer Response (0=120ms, 1=24ms)
Bit
11
Resolver Type (0=AMCI, 1=Autotech)
(Programmed on channel 1 only)
Bit
12
Capture Input Rising (channel 1 only)
Bit
13
Preset Input Falling (channel 1 only)
Bit
14
Capture Input Rising (channel 1 only)
Bit
15
Transducer Type Range: Single Turn: “don’t care.”
Multiturn: 100, 180, 1000, 1800 for AMCI or 128 for Autotech
Number of Turns Range: Single Turn: “don’t care.”
100 turn = 100, 50, 25, 20, 10, 5, 4, 2, or 1
Multiturn
180 turn = 180, 90, 60, 45, 36, 30, 20, 18, 15, 12, 10, 9, 6, 5, 4, 3, 2, 1
1000 turn = 1000, 500, 250, 200, 100, 50, 40, 20, 10
1800 turn = 1800, 900, 600, 450, 360, 300, 200, 180, 150, 120, 100, 90
60, 50, 40, 30, 20, 10
128 turn = 128, 64, 32, 16, 8, 4, 2, 1
Full Scale Count Range: 2 to 8192 for Single Turn resolvers
2 to (4096 * Number of Turns) for 100 or 180 turn transducer
2 to (409.6 * Number of Turns) for 1000 or 1800 turn transducer
2 to (1024 * Number of Turns) for an Autotech 128 turn transducer
Linear Offset Range: 0 to (32767 - Scale Factor) for single turn resolvers
0 to 999,999 for multiturn resolvers
Preset Range: Linear Offset to (Linear Offset + (Full Scale Count -1))
1. Words 8 and 9, the transducer type and number of turns parameter, apply only for multiturn channels
and are not used for single turn resolvers. When programming single turn resolvers, words 8 and 9
are “don’t cares.”
2. When programming multiturn transducers for Autotech, channel 1 must be programmed before
channel 2 because channel 1 configures the module for Autotech transducers.
20 Gear Drive, Plymouth Industrial Park, Terryville, CT 06786
Tel: (860) 585-1254 Fax: (860)584-1973 E-mail: Sales @amci.com
page: 20
NX2A4T-11 Specifications Rev 1.0
Four Channel Modbus TCP/IP Resolver Input Module
Programming Sequence
1. The ladder logic program writes the data into the output registers.
2. The ladder logic program then sets the transmit bit.
3. When the module detects the 0 to 1 transition of the transmit bit, it will respond by setting any error
bits and the Acknowledge bit in the input registers.
4. When the ladder logic program sees that the acknowledge bit is set, it will examine any error bits,
and then reset the transmit bit.
5. The module will reset the Acknowledge bit.
6. The programming sequence is now complete.
Warning: The EEPROM used to store parameter values, and the internal offset that is calculated every
time you use the Apply Preset Command, is guaranteed for approximately 100,000 write cycles
before writing to it will cause it to fail. Therefore, continuously presetting the position or
writing new parameters should be avoided. If your application requires you to continuously
preset the position, consider calculating the required position offset in you ladder logic
program. A description of how to perform this operation is shown in the FAQ section of our
website, www.AMCI.com. .
Revision History
Revision 0.0 was released on 6/3/05 and was the initial release of the specifications.
Revision 1.0 was released on 8/24/05 and added mounting, wiring, and network configuration data to the
specifications. More detailed programming information was also added to the specifications.
File: NX2A4T-11_REV_1.0_SPECS.doc
date: 8/24/05
20 Gear Drive, Plymouth Industrial Park, Terryville, CT 06786
Tel: (860) 585-1254 Fax: (860)584-1973 E-mail: Sales @amci.com
page: 21