ERROR 139: Communication error

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Error handlingET/MT-3x6, ET/MT-2x8 series error messagesError Messages of Individual DriversModbusTCP Client (Master)ERROR 139: Communication error

 

The part supplementary data of the Communication error message is like this:

 

-<direction>-<IP_address>-<unit>

 

The label's meaning is following:

ERROR 139: Communication error

Label

Meaning

A

Timeout of waiting for connect to complete

B

Timeout of waiting for send to complete

C

Timeout of sending request

D

Timeout of waiting for recv to complete

E

Timeout of receiving response prefix

F

Timeout of receiving response body

G

The unit identifier in the received response is not equal to the unit identifier in the sent request,

or the size of the response telegram does not fit

H

The transaction identifier in the received response is not equal to the transaction identifier in the sent request

 

 

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