Chapter 18 Checking The Leds - Mitsubishi Electric NZ2GN2S-D41P01 User Manual

18
CHECKING THE LEDS
This section describes how to troubleshoot the system by the LEDs.
When the PW LED does not turn on
When the PW LED does not turn on, check the following items.
Check item
Is any LED other than the PW LED turned on?
Is the module power supply (24VDC) wired?
Is the module power supply (24VDC) turned on?
Is the voltage of the module power supply
(24VDC) within the specified range?
When the RUN LED does not turn on
When the RUN LED does not turn on, check the following items.
Check item
Has any hardware error occurred?
When the RUN LED flashes
When the RUN LED flashes, check the following items.
Check item
Is the FPGA module in execution of the unit test?
When the FPGA RUN LED does not turn on
When the FPGA RUN LED does not turn on, check the following item.
Check item
Is FPGA control flag (RX0) ON?
18 CHECKING THE LEDS
434
Action
When any LED other than the PW LED turns on, the possible cause is a hardware error. Please consult
your local Mitsubishi representative.
Wire the module power supply (24VDC).
Turn on the module power supply (24VDC).
Set the voltage value within the range of performance specifications.
Action
Turn off and on the module power supply.
If the RUN LED does not turn on even after the module power supply is turned off and on, the possible
cause is a module failure. Please consult your local Mitsubishi representative.
Action
• When the FPGA module is in execution of the unit test, the RUN LED turns on after the unit test is
completed. Take corrective action according to the result of the unit test.
• When a unit test is not conducted, set the IP address/station number setting switches to an appropriate
value.
Action
• Turn on FPGA control start request (RY0) to start FPGA control.
• The conditions under which FPGA control can be started differ depending on the "FPGA control
automatic start setting" and "FPGA control continuation setting" settings and the operating status of the
master station and CPU module. For details, refer to the following.
Page 315 FPGA Control Function