Siemens simatic c7-621 Hardware Installation Manual page 129

N
Node Number
The node number represents the "access address" of a C7 CPU, C7 OP or a
programming or other intelligent I/O module when it communicates with
other nodes over an –> MPI network. The node number is assigned to the C7
CPU, C7 OP and programming device.
Non-isolated In non-isolated input/output modules, the reference potentials of the control
circuit and the load circuit are electrically connected.
O
Operating System The operating system of the C7 CPU organizes all functions and sequences of
of the C7-CPU the C7 CPU that are not part of a special control task.
P
Parameter
1. Variable of a STEP 7 logic block
2. Variable for setting the behavior of a module (one or more per module).
Each module is supplied from the factory with a default setting that can be
modified using the STEP 7 tool S7 Configuration .
There are –> static parameters and –> dynamic parameters.
Parameter
Parameter assignment refers to the setting of the behavior of a module.
Assignment
Parameter,
In contrast to static parameters, dynamic module parameters can be modified
dynamic
during operation by calling an SFC in the user program, for example, limit
values of an analog signal input module.
Parameter, static In contrast to dynamic parameters, static module parameters cannot be
modified by the user program. They can only be modified with the software
tool S7 Configuration, for example input delay of a digital signal input
module.
PG
–> Programming device
PLC –> Programmable logic controller
C7-621 / C7-621 AS-i Control Systems
C79000-G7076-C621-01
Glossary
Glossary-7