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supply. If the indicator is still off at this time, your ELC2 is malfunctioned. Send
your ELC2 back to your distributor for repair.
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RUN indicator
Check your ELC2 status. When ELC2 is running, this indicator will be on. You can
use ELC-HHP, the ladder diagram editing program or the switch on the panel to
RUN or STOP ELC2.
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ERROR indicator
If you enter an incorrect program into ELC2 or use instructions or devices that
exceed their range, this indicator will flash (approx. every 1 second). When this
happens, you have to obtain the error code from D1004 and save the address
where the error occurs in register D1137 (if the error is a general circuit error, the
address of D1137 will be invalid). Find out the cause of the error, amend the
program and resend the program to ELC2. If you cannot connect to ELC2 and this
indicator keeps flashing quickly (approx. every 0.2 second), it means that the 24
Vdc power voltage is insufficient. Please check if the 24V DC power supply is
overloaded.
If the ERROR indicator is on, you have to check the special relay M1008. If
M1008 is on, it indicates that the execution time of program loop exceeds the
preset time-out (in D1000). In this case, turn the RUN/STOP switch to STOP,
check the special register D1008 and obtain the location in the program where the
time-out takes place. Please refer to the WDT instruction to solve this problem.
After amending the program, you only need to resend the program to stop the
indicator from flashing. If the indicator still keeps flashing at this time, switch off
the power and check if there is any interference existing or conductive matter
inside ELC2.
For details of error codes (in D1004, hex coding), see “ELC System Manual:
Programming”.
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Input indicator
On/Off of input point is indicated by input indicator or monitored by ELC-HHP.
When the action condition of the input point is true, this indicator will be on. If
abnormality is identified, check if the indicator and input circuit are normal. Use of
electronic switch with too much electricity leakage often results in unexpected
actions of the input point.
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Output indicator
On/Off of output point is indicated by the output indicator. When the output
indicator (On/Off) does not correspond to the action of its load, please be aware of
the following:
1. The output contact may be melted or blocked due to an over loaded or
short-circuited load, which will result in poor contact.
2. If you are suspicious that the output point may execute an undesired action,
check the output wiring circuit and whether the screw is properly tightened.
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COM1, COM2, and USB indicators
If the RS232/USB LED indicator is On, it means that COM1/the USB port is
receiving data.
If the RS485 LED indicator is On, it means that COM2 is sending data.
