Mitsubishi Electric NZ2GN2S1-16D User Manual page 199

Check item
Does the master station connected to the network operate normally?
Does the model name of the slave station set in the network
configuration settings match the model name of the actual device?
Is the event code of 00C71 registered with event history of the master
station?
Has any error occurred in the I/O module?
Is the system configured with ring topology?
When the I/O PW LED does not turn on
When the I/O PW LED does not turn on, check the following items.
Check item
Is the external power supply (24VDC) wired?
Is the external power supply (24VDC) turned on?
Is the voltage of the external power supply (24VDC) within the
specified range?
Action
If an error occurs in the master station, clear the error in the master station.
Change the network configuration settings so that the model name of the slave station
set in the network configuration settings matches the model name of the actual device.
Or, in the network configuration settings, set the I/O module as a "General Remote
Station".
The CC-Link IE TSN Network synchronous communication function may be enabled
for an I/O module not supporting the CC-Link IE TSN Network synchronous
communication function.
Disable the CC-Link IE TSN Network synchronous communication function or perform
a firmware update for the I/O module.
If the event code of 00C71 is still registered even after the above actions are taken,
check the manual for the master station in use and eliminate the cause of event code
00C71.
If an error has occurred in the I/O module, a network parameter may be set to a value
that the I/O module cannot handle.
Check following errors in order from the top one, and find the error cause by referring
to "Description and cause" described in "Error Code List".
When the cause is found, eliminate it by referring to "Action" described in "Error Code
List". ( Page 214 Error Code List)
• Communication cycle setting error (1Gbps) (error code: D023H)
• Communication cycle setting error (100Mbps) (error code: D024H)
• Synchronization cycle setting error (error code: D026H)
• Number of RX/RY points error (error code: D021H)
• RWr/RWw number of points error (error code: D022H)
• RWr/RWw setting error (error code: D025H)
• Network synchronous communication setting error (error code: D020H)
• Communication setting error 2 (error code: D001H)
• Communication setting error 1 (error code: D000H)
When the firmware version of the I/O module is "02" or earlier, perform a firmware
update or configure the system with line topology, star topology, or mixture of line
topology and star topology.
Action
Wire the external power supply (24VDC).
Turn on the external power supply (24VDC).
Set the voltage value within the range of performance specifications.
11 TROUBLESHOOTING
197
11.2 Checking the LEDs
11