Siemens SIMATIC S7 System Manual page 543

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The following diagram shows the relationship of DONE, ERROR and STATUS parameters

when there is an error.

The DONE, ERROR and STATUS values are only valid until SEND_PTP executes again

with the same instance DB.

Table 12- 21 Condition codes

STATUS (W#16#....)

Interaction of the LENGTH and BUFFER parameters for SEND_PTP

The minimum size of data that can be transmitted by the SEND_PTP instruction is one byte.

The BUFFER parameter determines the size of the data to be transmitted. You cannot use

the data type Bool or arrays of Bool for the BUFFER parameter.

S7-1200 Programmable controller

System Manual, 11/2011, A5E02486680-05

New request while transmitter active

Transmit aborted because of no CTS within wait time

Transmit aborted because of no DSR from the DCE device

Transmit aborted because of queue overflow (transmit more than 1024 bytes)

Reverse bias signal (wire break condition)

The DB for the BUFFER parameter does not exist.

105BCommunication processor

12.3 Point-to-Point (PtP) communication

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Simatic s7-1200