OTT HydroMet SUTRON XLINK 100, Operation & Maintenance Manual

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Page 207 of 248
Modbus Rs232 Server Enable On
Modbus Rs232 Server Device ID 1
Modbus Rs232 Server Delay before Tx 0 ms
Modbus Rs232 Server Delay after Tx 0 ms
Modbus Rs232 Protocol
RTU
Modbus Rs232 BaudRate 19200
Modbus Rs232 Parity Even
Additionally, if the station is to collect data from Modbus sensors, it needs to have a measurement setup
for each Modbus sensor. Below is a list of all the Modbus measurement settings along with their defaults:
Setting Default
Modbus Port RS485
Modbus Device Id 1
Modbus Reg Type Holding
Modbus Reg Number 1
Modbus Value Short
Modbus MSW Hi Reg
Modbus Timeout 2 sec
Modbus Retries 3
19.3.1 Modbus General Settings
Modbus Server Enable
For the station to become a Modbus server over one of the ports, the appropriate setting must be
enabled.
Once Modbus Server Enable is turned on any port, LinkComm will no longer be able to access the station
over that port. Once enabled, the setting may only be turned off over a different communications port.
Here are options that are always available:

LinkComm connecting via USB and Wi-Fi

Send a setup file via Modbus

Change setup using USB thumb drive

Sending a text message to the station. The text message should say MODBUS CELL SLAVE
ENABLE = OFF
Modbus Protocol
The Protocol setting affects both Modbus client and Modbus server on RS-485 and RS-232. Modbus over
RS-485 and RS-232 allows RTU and ASCII protocols. RTU is the default value. Cell only supports the TCP/IP
protocol.
Modbus supports different protocols:

RTU (usable on RS-232 and RS-485)