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Daniel 3410 Series Ultrasonic Gas Flow Meter Installation Manual Section 3: Electrical installation
3-9000-759 Rev D June 2014
CPU Module labeling and LED indicators 55
Modbus TCP
If the meter firmware supports Modbus TCP slave functionality, the following controls will be
available.
Modbus TCP unit identifier: Enter the Modbus TCP unit identifier here. Valid values are 0-255.
Enable alternate Modbus TCP port: The standard TCP port for Modbus TCP is port 502. This port
is always enabled in a meter that supports Modbus TCP. By selecting this option, you can also
enable Modbus TCP communications on a secondary TCP port specified by Alternate Modbus
TCP port.
Alternate Modbus TCP port:
Enter the alternate TCP port number here after selecting Enable alternate modbus TCP port.
Valid port numbers are from 1 to 65535. The meter will not allow some port numbers that are
either used by the meter or are defined port numbers for other protocols. Daniel MeterLink™
will prompt you if it was not able to write the specified port number to the meter.