Hardware Considerations
Chapter 2
22
Figure 2.1
PLC2/30
Processor
Diagnostic
Indicators
Keylock
Mode
Select Switch
When the memory write protect jumper (Figure 2.2) is removed from a
1772-LH processor interface module, data table values can be changed
between word addresses 010
8
and 377
8
. These values can be changed only
when the processor is in the program mode or in the run/program mode
using on-line data change.
2.2
Memory
W
rite Protect
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