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Glossary
Node station TIM
WAN interface of a TIM in a node station set to the "node station" function.
If the TIM used in a node station has two WAN interfaces, the "station", "node station" and
"master station" functions can be used in any combination on one TIM.
OPC
OLE for Process Control
OPC includes a series of specifications for data exchange in automation engineering
between controllers, alarm transmitters etc. and control systems.
Organizational message
Organizational messages are used to execute organizational system functions.
These include, for example:
● General requests
● Time synchronization
● Counted value storage
● Coordinated connection establishment and termination in a dial-up network
● Message indicating station startup and station failure
● Requests for and transmission of subscriber records
Parameter assignment
A device is assigned the parameters it requires for starting up when it is supplied with data.
Party line
Setup of the communications bus of the smaller S7-300 CPUs. The communications bus id
physically wired through to the MPI interface.
Party line CPUs are: CPU 312.. / 313.. / 314.. / 315.. to CPU 315-2 DP and C7 devices.
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
With non party line CPUs (CPU 315-2 PN/DP to CPU 319-3 PN/DP) 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.
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SINAUT ST7 station control system
System Manual, 09/2016, C79000-G8976-C178-10
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