Plc Led Functions - ESAB Precision Plasmarc Installation, Operation And Maintenance Manual For Residential Installation

SECTION 6
6.2.1 PLC LEDs (Light Emmiting Diode)

6.2.2 PLC LED Functions

LED LED
LED LED
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
OUTPUT 1 CH
0 1 2 3 4 5 6 7
8 9 10 11
POWER
RUN
ALARM
ERROR
INPUT 0 CH
0 1 2 3 4 5 6 7
8 9 10 11 12 13 14 15
INPUT INPUT INPUT INPUT
Function Function
Function Function
Start/Stop
Not Used
Arc-On
Not Used
Not Used
Fault
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
Highly reliable indicators. It is not likely that one will
"burn out". However, if the technician is not
confident that the LEDs are working, the presence
of a signal can be confirmed by using a meter and
taking a measurement on the appropriate pin.
Refer to the schematic and wiring diagrams.
This exchange of signals can be confirmed by
•
observing the LEDs on the top of the PLC while
troubleshooting. These indications are useful in
isolating a system failure to the most likely
device.
The LEDs are divided into two groups;
•
Input (0-15) light when the corresponding
§
signal is detected by the PLC.
Output (0-11) light when the PLC issues a
§
signal to an external device.
OUTPUT OUTPUT OUTPUT OUTPUT
LED LED Function Function
LED LED Function Function
0 Not Used
1 Hi-Frequency
2 Pilot Arc Relay
3 Power Source
4 Not Used
5 Fault Output
6 Not Used
7 Not Used
8 Not Used
9 Not Used
10 Not Used
11 Not Used
6-2
TROUBLESHOOTING