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S5-115U Manual
Not represented:
Operating System Submodule (only CPU 944)
As well as the PLC operating system, this submodule also contains driver blocks for the second
interface. They are loaded into the user memory of the interface after power restore.
Intelligent Input/Output Modules (IPs)
Intelligent input/output modules are available for handling the special tasks:
•
counting rapid pulse trains
•
measuring and processing positioning increments
•
measuring speed and time
•
controlling temperatures and drives, and so on.
Intelligent input/output modules generally have their own processor and thus off-load the
CPU. Consequently, they can process measuring and open- and closed-loop control tasks
quickly while the CPU handles other jobs.
2.2
Functional Units
CPU
Timers,
counters,
flags
PII
EWA 4NEB 811 6130-02b
ACCUM
Processor
I/O bus
Input
modules
(digital/
analog)
Functional
modules
Figure 2-2. Schematic of the S5-115U
Technical Description
Internal
Memory
program
submodule
memory
(EPROM/
(RAM)
EEPROM/
RAM)
Serial
interface
PIQ
Output
modules
(digital/
analog)
Input/output modules
2-3
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