FAQs
9.2 Error with Modbus TCP connection
Circuit protection devices with communication and metering function
System Manual, 06/2021, L1V30827018B-01
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9.2 Error with Modbus TCP connection
• Check power supply (communication only possible if the device is supplied
with power. If necessary, the device has tripped)
• Check the correct device address
Check the correct register
Data point provides incorrect value
• Check the correct device address and register of the desired device (each
terminal device does not support each data point)
• Check whether the start address of the register has been decremented by -
1 for readout
Parameters cannot be modified
• Check the correct function code
9.3 Error with firmware update
• Check the power supply
• Check the error-free communication
• Check the correct firmware version (this must be higher than the current
one)
• Check the correct device type
• Restart firmware update
Update runs into a timeout