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7
MODBUS RTU
Default setting
Baudrates
Parity, stop- start bits
Modbus address range
7.1 Special sequence Modbus telegram
The parameters presented in the Main Measures menu is available as one contiguous block in the Modbus
mapping, making it easy and time saving to read the most common parameters from the ITS2.1 unit.
The following parameters can be read:
Modbus address
Parameters
100-104
L1, L2, L3
150-152
V1N, V2N, V3N
154-156
V12, V23, V31
206-207
Ptot
214-215
Qtot
304-305
Active energy total
250-252
Power factor
279
Temperature
4826
Status
7.2 Modbus RTU trouble and fault finding
There are several ways to troubleshoot a Modbus line.
Assuming the Modbus line is OK hardware vice: correct polarity, no similar addresses, trouble with
termination, reading of Modbus register issues etc., a laptop with USB – RS-485 converter and Ekip connect
can be used for testing the Modbus line. It will even handle multidrop.
ITS2.1 User Manual rev.04/1SEP622750P0001
19200 E,8,1
Default Modbus addr. 247
9600, 19200
E,8,1 – O,8,1 – N,8,2 – N,8,1
1 – 247
Comment
Actual current measure by the CT's
Actual phase voltages
Actual line voltages
Calculated 3 phase active power (kW)
Calculated 3 phase reactive power (kvar)
Sum of positive and negative active energy (kWh)
Calculated 3 phase power factor
Actual temperature measure on the L2 cable terminal
Switch status and Fuse blown status
25
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