Combilift Ltd.
C4000-C5000XL O&S Manual
5-25
C4000-OM-EN-08
5.16: 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
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