Siemens SIMATIC S7-1200 Reference Manual page 79

Basic instructions
ET 200S serial interface
✔ ✔ ✔
Receive data
✔ ✔ ✔
Send data
✔ ✔ ✔
Read accompanying signals at the RS 232 interface
✔ ✔ ✔
Write accompanying signals at the RS 232C interface
✔ ✔ ✔
Set data flow control using XON/XOFF
✔ ✔ ✔
Set data flow control using RTS/CTS
Configure data flow control via automatic Configure
✔ ✔ ✔
operation of the RS 232C accompanying signals
✔ ✔ ✔
Modbus slave instruction for ET 200S 1SI
✔ ✔ ✔
Send data to a USS slave
✔ ✔ ✔
Receive data from a USS slave
✔ ✔ ✔
Initialize USS
SIMATIC NET CP
Open User Communication
Passes data to the CP for transfer via a configured
✔ ✔
connection
✔ ✔
Passes jobs to the CP for accepting received data
✔ ✔
Locks data exchange via a connection with FETCH/WRITE
A5E33284667-AA
Extended instructions
Description
Technology
LAD/FBD
Note: S stands for serial
S_RCV
S_SEND
S_VSTAT
S_VSET
S_XON
S_MODB
S_USST
S_USSR
S_USSI
AG_SEND
AG_RECV
AG_LOCK
Communication
STL
SCL
(not S7-1200)
S_RTS
S_V24
Page 78