Siemens S7-1200 System Manual page 761

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Table of Contents

Condition codes

Table 12- 82 MB_SLAVE execution condition codes (communication and configuration errors)

STATUS (W#16#)

Table 12- 83 MB_SLAVE execution condition codes (Modbus protocol errors)

STATUS (W#16#)

In addition to the MB_SLAVE errors listed above, errors can be returned from the underlying PtP communication

instructions.

S7-1200 Programmable controller

System Manual, 03/2014, A5E02486680-AG

The receiver issued a flow control request to suspend an active transmission and never re-

enabled the transmission during the specified wait time.

This error is also generated during hardware flow control when the receiver does not assert

CTS within the specified wait time.

The transmit request was aborted because no DSR signal is received from the DCE.

The message was terminated because the receive buffer is full.

The message was terminated as a result of a parity error.

The message was terminated as a result of a framing error.

The message was terminated as a result of an overrun error.

The message was terminated as a result of the specified length exceeding the total buffer

Invalid port ID value or error with MB_COMM_LOAD instruction

Invalid Modbus station address

Invalid pointer to MB_HOLD_REG DB: Area is too small

Invalid MB_HOLD_REG pointer to M memory or DB (DB area must allow both symbolic and

direct address)

Response code from

Communication processor and Modbus TCP

Modbus protocol errors

Function code not supported or not supported within broadcasts

Data length error

Data address error or address outside the valid range of the

DATA_PTR area

Data value error

Data diagnostic code value not supported (function code 08)

12.5 Modbus communication