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Rockwell Automation Publication 857-UM002C-EN-P - February 2018
Chapter 4
Configure the Base 857 Relay
External I/O configuration for 857-RAD
Follow these steps to select the external I/O device type and protocol.
1. Under Protocol Configuration, select External I/O Configuration.
2. Click the External I/O Device Type.
3. Select 857-RAD.
4. Click External I/O Protocol.
5. Select ModBus.
The External I/O Bit Rate should be set to 9600 bits per second (bps) and the
Data Parity is always Even.
The External I/O Bit Rate should be set to 9600 bits per second (bps) and the
Data Parity is always Even.
The 857-RAA input settings are shown in
Table 6
.
IMPORTANT
If a parameter is changed, it will be highlighted in red. This indicates that a
change has been made and this data must be uploaded into the base relay.
Once saved to the relay, the relay may request a reboot (restart) depending
on the setting changed.
Table 6 - External I/O Configuration Settings
External I/O Device Type
857-RAD
External I/O Protocol
(1)
(1) After changing this parameter, you must restart the relay using SetPointPS or by cycling power the 857 base relay.
ModBus
External I/O bit rate
(1)
9600
Parity
(1)
Even
Summary of Contents for 857-RAA
Page 1: ...857 RAA 857 RAD RTD Scanner Catalog Numbers 857 RAA 857 RAD User Manual OriginalInstructions...
Page 6: ...6 Rockwell Automation Publication 857 UM002C EN P February 2018 Preface Notes...
Page 10: ...10 Rockwell Automation Publication 857 UM002C EN P February 2018 Chapter 1 Layout Notes...
Page 14: ...14 Rockwell Automation Publication 857 UM002C EN P February 2018 Chapter 2 Application Notes...
Page 41: ......
