User guide

Chapter 5
Setup and Configuration
RUGGEDCOM ROS
User Guide
134 Configuring a TCP Modbus Client
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Figure 90: Modbus Server Form
1. Port Box 2. Response Timer Box 3. Auxiliary TCP Port Box 4. Send Exceptions Options 5. Link Stats Options 6. Apply
Button 7. Reload Button
4. Configure the following parameter(s) as required:
Parameter Description
Port Synopsis: 1 to maximum port number
Default: 1
The port number as seen on the front plate silkscreen of the switch.
Response Timer Synopsis: 50 to 10000
Default: 1000 ms
The maximum allowable time to wait for the RTU to start to respond.
Auxiliary TCP Port Synopsis: 1024 to 65535 or { Disabled }
Default: Disabled
The TCP Modbus Server always listens on TCP port 502. It may be additionally
configured to listen on this auxiliary port number, accepting calls on both.
Send Exceptions Synopsis: { Disabled, Enabled }
Default: Enabled
This parameter enables/disables sending a TCP Modbus exception back to the master if
a response has not been received from the RTU within expected time.
Link Stats Synopsis: { Disabled, Enabled }
Default: Enabled
Enables link statistics collection for this protocol.
5. Click Apply.
Section 5.4.9
Configuring a TCP Modbus Client
To configure the TCP Modbus Client protocol for a serial port, do the following:
1. Make sure the serial port is configured to use the TCP Modbus Client protocol. For more information, refer to
Section 5.4.5, “Configuring a Serial Port”.