Glossary
Glossary-6
ET 200S Interface Module IM 151/CPU
A5E00058783-01
Function
A function (FC) in accordance with IEC 1131-3 is a code block without static
data. A function allows parameters to be passed in the user program. Functions
are therefore suitable for programming frequently repeated complex functions
(e.g. calculations).
Intelligent DP Slave
The defining feature of an intelligent DP slave is that input/output data is not
made available to the DP master by a real input/output of the DP slave directly,
but by a preprocessing CPU (in this case the IM 151/CPU interface module).
Interrupt
The operating system of the CPU recognizes 10 different priority classes that
control the processing of the user program. These runtime levels include
interrupts, e.g. diagnostic interrupts. When an interrupt is triggered, the operating
system automatically calls an assigned organization block in which the user can
program the desired response (for example in an FB).
Interrupt, Diagnostic Diagnostic Interrupt
Interrupt, Process
Process Interrupt
Load Memory
The load memory is part of the CPU. It contains objects generated by the
programming device. It is implemented either as a plug-in memory card or a
permanently integrated memory.
Master
When they are in possession of the token, masters can send data to and request
data from other nodes (= active node). An example of a DP master is the CPU
315-2 DP.
Master System
All the DP slaves that are assigned to a DP master for reading and writing make
up a master system with the DP master.
To Next Page
Loading...
Need help?
General
