Mitsubishi Q Series User Manual

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MELSEC-Q
8 TROUBLESHOOTING
8.3 If the RUN LED Has Flickered or Turned Off
Check item Corrective action
Is 5VDC supplied?
• Check the power supply module.
• Load the module securely.
Is the sum of current capacities of the modules
loaded on the base unit equal to or less than
the current capacity of the power supply
module?
Make the sum of current capacities of the
modules loaded on the base unit equal to or
less than the current capacity of the power
supply module.
Has a watchdog timer error occurred?
• Reset the programmable controller CPU or
power it on again.
• Change the Q62HLC.
Is a module change enabled during an online
module change?
Refer to Chapter 7 and handle it.
8.4 If the ERR. LED Has Turned On or Flickered
(1) If turned on
Check item Corrective action
Is cold junction temperature compensation
resistance disconnected?
• Connect cold junction temperature
compensation resistance.
• Q62HLC hardware fault.
Please consult your sales representative.
(2) If flickered
Check item Corrective action
Has a write data error occurred?
• Check the error code list in Section 8.1 and
correct the sequence program.

Mitsubishi Q Series Specifications

General

I/O Points	Up to 4096 points
Communication	Ethernet, RS-232, RS-485
I/O Modules	Digital, Analog, Specialized
Programming Language	Function Block Diagram, Structured Text
Power Supply	24V DC, 100-240V AC
Operating Temperature	0°C to 55°C
Shock Resistance	147 m/s2 acceleration, 3 times in each of X, Y, and Z directions
Program Capacity	Up to 252K steps