Siemens 6GK7242-7KX30-0XE0 Manuale Utente
Notes on operation and configuration
4.7 Data transfer between communications partners
CP 1242-7
42
Operating Instructions, 03/2012, C79000-G8976-C247-03
● Send process image
– Data that the "TC_SEND" instruction in the program of the S7-1200 CPU transfers to
the CP to send via GPRS for a read job.
– Data called up by a read job of the telecontrol server.
● Receive process image
– Data that the "TC_RECV" instruction in the program of the S7-1200 CPU receives
from the CP for a receive job.
– Data that the CP receives via GPRS and forwards to the "TC_RECV" instruction for a
write job of the telecontrol server.
4.7
Data transfer between communications partners
4.7.1
Sending from station to station
Sending to an S7 station with CP 1242-7
After transferring data from the CPU (TC_SEND) to the send process image of the CP, the
CP sends the data immediately to the remote communications partner via GPRS. This
applies to the S7 stations:
● S7 stations that can be reached via the telecontrol server.
● S7 stations that can be reached via the telecontrol server.
CP in "Telecontrol" mode
● S7 stations that can be reached directly.
CP in "GPRS direct" mode
4.7.2
The S7-1200 sends data to the master station (TC_SEND)
Requirements
● The OPC server has been started on the telecontrol server (an OPC client has connected
to the telecontrol server).
● The TC_CON instruction was started successfully.