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What to Set StatusRegister to Establish Communication between Power Scada Expert (PSE) and EM4800

Issue
EM4800 devices in Power Scada Expert are offline.

Product Line
EM4800
Power Scada Expert (PSE)

Environment
INI file configuration.

Cause
StatusRegister parameter in the INI file defines a holding register that the driver reads to determine whether a device is responding to communication requests. The result of this read is not important, however it must be a valid register address within the device.  By default this parameter is set to Modbus address 1100 (41100).

The MODBUS registers in EM4800 are “1 based” numbers for example 0 = 40001, 2=40003, 1100=41101 etc.

          

Now considering the default StatusRegister address of 1100 (41100), it corresponds to address 1099 (41099) in the EM4800 and does not exist in the register map (note the gap between 1014 and 1100 in the screen shot).

Resolution
Set the StatusRegister to a valid address considering that the registers are 1 based, for example 1101 (which corresponds to 1100 in EM4800):
StatusRegister = 1101
 
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