ICP DAS USA MDC-700 Series User Manual page 31

The local registers mapping is listed on the main page of the MDC‐700 module.
The MDC‐700 allows users to enable/disable a polling definition by changing the first field of the
polling definition section in the config.csv file. There are three types that users can use:
"*": Asterisk symbol means that this is a valid polling definition. The MDC‐700 will assign local
register for data defined in the definition and save the polled data to the mapping local register.
"‐": Minus sign means that this is a disabled polling definition. The MDC‐700 will assign local register
for data defined in the definition but will not poll the data.
"": Empty means that this is a null polling definition. The MDC‐700 will neither assign local register
for data defined in the definition nor poll data.
# UseComPort SlaveModbusID FunctionCode RegStartAddr RegCount
*
*
*
With the function of retaining register space mapped for specific devices, or releasing those spaces
mapped but reserving the definition, the main program on the Modbus master device can be
applied in similar applications where users would like to change or stop some devices without
modification or with minimum level of modification.
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