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Technical Description
Front Panels of the Central Processing Units
The following operator functions are possible on the front panel of the CPUs:
•
Plug in a memory submodule
•
Connect a programmer (PG) or an operator panel (OP)
•
Connect SINEC L1
•
Connect PLCs or devices of other manufacture
- CPU 943/944: connection with ASCII driver or point-to-point connection (master function)
- only in the case of the CPU 944: computer interface (3964(R) procedure)
•
Set the operating mode
•
Preset retentive feature
•
Perform Overall Reset
•
Change the operating system submodule (only CPU 944)
LEDs indicate the current CPU status. Figure 2-7 compares the individual CPUs.
115U
CPU
941
View of CPU 941/942
Receptacle for memory
submodule
Control panel
Connection sockets for PG,
OP or SINEC L1 LAN
Figure 2-7. Front View of the Central Processing Units
2-12
RN
ST
RN
ST
QVZ
ZYK
BASP
NR
RE
OR
Connection sockets for PG, OP or SINEC L1 LAN,
point-to-point connection (master function),
ASCII driver, (CPU 944 only:) computer interface
Operating mode and error LEDs
Receptacle for operating system submodule (only
CPU 944)
S5-115U Manual
115U
CPU
944
RN
ST
RN
ST
QV
ZY
BA
NR
RE
OR
SI 2
SI 1
View of CPU 943/944
EWA 4NEB 811 6130-02b
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