Comtrol Modbus TCP Quick Start User Manual
Page 39
DeviceMaster UP Modbus/TCP Quick Start: 2000477 Rev. G
Configuring Read/Write Raw/ASCII Devices - 39
Configuring Read/Write Raw/ASCII Devices
8.
Set up the serial packet identification (Serial Packet ID Settings (Raw Data Only).
•
Set the STX (Start of transmission) Rx Detect in decimal format.
•
Set the ETX (End of transmission) Rx Detect in decimal format. Refer to your serial device's User Manual
for these settings.
•
Enable the Strip Rx STX/ETX option if you do not want the STX and ETX bytes returned to the PLC or
application.
•
If desired, set the STX (Start of transmission) Tx Append in decimal format. This will append the STX
byte(s) to transmitted messages from the PLC or application.
•
If desired, set the ETX (End of transmission) Tx Append in decimal format. This will append the ETX
byte(s) to transmitted messages from the PLC or application.
9.
Configure the Serial Modbus Master and Modbus/TCP Settings (Raw-Data Only) settings for your
environment using one of the following methods.
•
PLC Master/DeviceMaster UP Slave mode. You can use the PLC Master/DeviceMaster UP Slave
method only if your PLC can operate as a Modbus/TCP master, Modbus/RTU serial master, or Modbus/
ASCII serial master. Go to Step
on Page 40 for configuration procedures.
•
PLC Slave/DeviceMaster UP Master mode. You can use the PLC Slave/DeviceMaster UP Master
method only if your PLC can operate as a Modbus/TCP slave, Modbus/RTU serial slave, or Modbus/
ASCII serial slave. Go to Step
on Page 41 for configuration procedures.