6 Digit modbus Addressing

[Anonymous user]

I am trying log data on the Comx 200.

I am trying to create a custom Modbus TCP device but it does not accept the registers. The device in question makes use of 6 digit Modbus addressing.

For example the Frequency is at register 418443  . I am able to read this device with an RTU but the comx will not allow it.

Is there a work around or perhaps I am just doing it wrong.

Has anyone had any success with a similar issue.

[Grant_IPACS]

Hi Caylum,

Usually Modbus registers are expressed as 4 or 5 digits, with the last 4 digits are usually the register with the data.

the first being the data type / function code.

some RTU software will drop the prefix for you, as does the Com'X expect it.

HTH

Grant