*ORVVDU\
S7-300 Automation System, Hardware and Installation: CPU 31xC and CPU 31x
13-10 A5E00105492-03
2%SULRULW\
The CPU Æ operating system distinguishes between different priority classes, e.g.
cyclic program execution, program execution controlled by process interrupt. Each
priority class is assigned Æ organization blocks (OB) in which the S7 user can
program a response. The OBs have different standard priorities which determine
the order in which they are executed or interrupted in the event that they are
activated simultaneously.
2SHUDWLQJPRGH
SIMATIC S7 PLC operating modes are: STOP, Æ START-UP, RUN.
2UJDQL]DWLRQ%ORFNV
Organization blocks (OBs) form the interface between CPU operating system and
the user program. The processing sequence of the user program is defined in the
organization blocks.
3DUDPHWHUV
1. Variable of a 67(3 code block
2. Variable for declaring module response (one or several per module). All modules
have a suitable basic factory setting which can be customized in 67(3.
There are Æ static parameters and Æ dynamic parameters
3DUDPHWHUVG\QDPLF
Unlike static parameters, dynamic parameters of modules can be changed during
operation by calling an SFC in the user program, for example limit values of an
analog signal input module.
3DUDPHWHUVVWDWLF
Unlike dynamic parameters, static parameters of modules cannot be changed by
the user program. You can only modify these parameters by editing your
configuration in 67(3, e.g. modification of input delay parameters of a digital
signal input module.
3*
Æ Programming device
3/&
An automation system in the context of SIMATIC S7 Æ is a programmable logic
controller.
To Next Page
Loading...
Need help?
General
