GE DS200TCPSG1AD Channel relay module

Boolean Reads are logic signals that are readable from, but not writeable to, the 2301D-ST. An example of a Boolean read value would be a turbine trip status indication. The logic true will have the value 1 if the statement in the description column is true and a 0 if false. The ‘1:’ term in the address identifies an logic true. The 2301D-ST supports Modbus function code 2, which involves reading selected logic signals.

Analog Reads 

Input registers are analog values that are readable from, but not writeable to, the 2301D-ST. Turbine speed is an example of an analog read value. The values of the input registers are stored internally to the control as floating point numbers representing engineering units (kPa or rpm). The values that are transmitted are integers ranging from –32767 to +32767. Since Modbus can only handle integers, values that have a decimal point are multiplied by a constant before being sent by Modbus. For example, these input registers may be listed as the Modbus value `x100’ or `x10’ under the description heading to denote the value is multiplied by a scaling constant. This will allow transmission of decimal parts of a unit if this is necessary for better resolution

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