WEG CFW100 User Manual page 18

P0680 (holding register 680): Status word
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P0681 (holding register 681): Motor speed
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Command (writing):
P0682 (holding register 682): Command Word

P0683 (holding register 683): Speed Reference

Refer to the Programming Manual for a complete parameter list of the equipment.
NOTE!
All the parameters are treated as holding type registers. Depending on the master that is used,

those registers are referenced starting from the base address 40000 or 4x. In this case, the
address that must be programmed in the master for a parameter is the address showed in the
table above added to the base address. Refer to the master documentation to find out how to
access holding type registers.
It should be noted that read-only parameters can only be read from the equipment, while other

parameters can be read and written through the network.
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Operation in the Modbus RTU Network – Slave Mode