Sgn_Set Instruction - Siemens SIMATIC S7 System Manual

8.7.9

SGN_SET instruction

Parameter
REQ
PORT
SIGNAL
RTS
DTR
DSR
DONE
ERROR
STATUS
STATUS
(W#16#....)
80F0
80F1
80F2
80F3
S7-1200 Programmable controller
System Manual, 11/2009, A5E02486680-02
SGN_SET (Set RS232 Signals) sets the states of RS232
communication signals. This function is only valid for the RS232
CM (communication module).
Parameter Data type
type
IN Bool
IN PORT
IN Byte
IN Bool
IN Bool
IN Bool
OUT Bool
OUT Bool
OUT Word
Description
CM is RS485 module and no signals are settable
Signals cannot be set because of Hardware flow control
Cannot set DSR because module is DTE
Cannot set DTR because module is DCE
Point-to-Point (PtP) communications
Description
Start the set RS232 signals operation, on the rising edge of
this input
Communication port identifier:
This logical address is a constant that can be referenced
within the "Constants" tab of the default tag table.
Selects which signal to set: (multiple allowed)
01H = Set RTS

02H = Set DTR

04H = Set DSR

Request to send, module ready to send value to set (true or
false)
Data terminal ready, module ready to send value to set
(true or false)
Data set ready (only applies to DCE type interfaces) (not
used)
TRUE for one scan, after the last request was completed
with no error
TRUE for one scan, after the last request was completed
with an error
Execution condition code
8.7 Point-to-Point instructions
265