About the PS4-200
Compact PLC
12
04/99 AWB 27-1184 GB
The 128 Kbyte flash module is subdivided into a
64 Kbyte backup memory (retentive storage of
the user program in the event of a voltage failure)
and a 64 Kbyte memory for recipe data, for
example.
The 160 Kbyte combination module integrates all
the features of the other two memory modules.
Figure 2: Dynamic memory allocation
Status LEDs for the PLC
The PLC states are indicated by means of the
“Ready”, “Run”, “Not Ready” and “Battery” LEDs
(see chapter entitled “Test/Commissioning/
Diagnostics”).
8 Kbyte data memory
Programm memory
Data memory
RAM memory
PS 4
Memory modul
(external)
24 Kbyte program memory
32 Kbyte program memory
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