ERROR 139: Communication error

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Error handlingET/MT-3x6, ET/MT-2x8 series error messagesError Messages of Individual DriversSiemens Teleperm-MERROR 139: Communication error

 

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

 

-<direction>

 

The label's meaning is following:

ERROR 139: Communication error

Label

Meaning

A

There is not any DLE STX response of the PLC on the AD request telegram sent by the terminal

B

The response telegram on the AD request was not received completely

C

No character or less than 4 characters of the request telegram were received

D

The header of the received request telegram is not any header of an AD telegram

E

The header of the AD request telegram was not received completely

F

The AD request telegram was not received completely

G

No answer from the PLC on the response telegram sent by the terminal

H

The PLC answers by NAK on the response telegram sent by the terminal

I

Invalid answer (not NAK, not DLE) from the PLC on the response telegram sent by the terminal

 

 

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