Communication processor and Modbus TCP
13.3 Point-to-point (PtP) communication
S7-1200 Programmable controller
1128 System Manual, V4.2, 09/2016, A5E02486680-AK
Receive_Reset (Delete receive buffer)
Table 13- 29 Receive_Reset (Receiver Reset) instruction
REQ:=_bool_in_,
PORT:=_word_in_,
DONE=>_bool_out_,
ERROR=>_bool_out_,
STATUS=>_word_out_);
Receive_Reset clears the receive
buffers in the CM or CB.
1
STEP 7 automatically creates the DB when you insert the instruction.
Table 13- 30 Data types for parameters
REQ IN Bool Activates the receiver reset on the rising edge of this enable input (Default
PORT IN PORT After you install and configure a CM or CB communication device, the port
identifier appears in the parameter helper drop-list available at the PORT box
connection. The assigned CM or CB port value is the device configuration
property "hardware identifier". The port symbolic name is assigned in the "Sys-
tem constants" tab of the PLC tag table. (Default value: 0)
DONE OUT Bool When TRUE for one scan, indicates that the last request was completed with-
out errors.
ERROR OUT Bool When TRUE, shows that the last request was completed with errors. Also,
when this output is TRUE, the STATUS output will contain related error codes.
Error code (Default value: 0)
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