Technical
117
C2500CB-OM-EN-16
7.7 PLC Details
The diagram below shows the layout of the major components of the PLC board that
need to be known in order to correctly find and repair faults.
The pins in each of the plugs on the board are laid out as follows.
The System LED tells the operator what the PLC is doing. The following table gives
an explanation of what the System LED is indicating.
System LED Status
Meaning
No LED
No power Supply to PLC
Flashing Green (Fast)
PLC is not Programmed
Flashing Green (Slow)
PLC is Programmed & Running Normally
Static Green
PLC is Programmed but not Running
Static Red
PLC has Failed (Replace PLC)
Each of the plugs has a specific function as do the pins on each plug. The tables on
the following pages give details of the functions on each of the plugs and the pin
associated with each function.
PLUG X4
PLUG X3
PLUG X5.1
PLUG X5.2
LED
1 2 3 4 5 6 7 8 9 10
1 2 3 4 5 6 7 8
Dip Switches
System LED
1 3 5 7 9 11 13 15 17
18
16
14
12
10
8
6
4
2
