Siemens S5-135U/155U Manual De Usuario

1-1

System Manual
C79000-G8576-C199-06

The S5-135U/155U PLC is a member of the family of SIMATIC S5
programmable (logic) controllers. The controller can be used in single and in
multiprocessor operation with up to four CPUs. In multiprocessor operation,
each CPU processes its individual user program independently of the other
CPUs (multicomputing).

The following are available as CPUs:

CPU 948

for fast word and binary signal processing especially
fast double-word and floating point processing and for
large programs with a high storage requirement;
programming in STEP 5. 
When you use a CPU 948 you have an S5-155U PLC.

CPU 928B

for fast word and binary signal processing and for
communication; programming in STEP 5.

CPU 928

for fast binary signal processing and for word
processing; programming in STEP 5.

CPU 922 

(R processor)

for word processing (computing controlling
monitoring signaling); programming in STEP 5.

You can combine the CPUs arbitrarily at the CPU slots in the central
controller:

CPU 948/CPU 928B/CPU 928

 2 slots

CPU 922/CPU 928-3UA21/

CPU 928B-3UB21

CPU 948B-3UA13/ -3UA23

1 slot