Siemens SINAUT ST7 System Manual page 137

Party line
● Party line CPUs are:
– CPU 312/313/314/315 to CPU 315-2 DP
– C7 devices
The communication bus of the smaller S7-300 CPUs is physically wired through to the
MPI interface of the CPU.
With party line CPUs you can use every type of TIM. You will find details on the Internet
at the following address:
https://support.industry.siemens.com/cs/ww/en/view/24059469
● Non-party line CPUs are:
– CPU 315-2 PN/DP to CPU 319-3 PN/DP
With non-party line CPUs, the MPI interface and communications bus are separate.
Permanent call
A permanent call does not interrupt the normal polling cycle; it is always executed alternating
with the standard poll from the normal polling cycle.
PG
Programming device
Allows access by the STEP 7 configuration software to the SIMATIC CPU.
PG routing
Using PG routing, it is possible to access programmable modules or modules with
diagnostics capability beyond network boundaries from a programming device (PG) or
computer (PC).
PLMN
Public Land Mobile Network
Worldwide unique identifier of mobile networks. The PLMN is made up of the three-digit
Mobile Country Code (MCC) and the two-or three-digit Mobile Network Code (MNC) of the
network provider.
Polled frames
Polled data frames are data frames of a station or node TIM with a special identifier
indicating that they were sent in response to a general request from the master station.
Polling
Polling mode
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SINAUT ST7 - Volume 1
System Manual, 11/2018, C79000-G8976-C178-12
Glossary
137