Mitsubishi Electric MELSEC QS Series User Manual page 134

9
TROUBLESHOOTING
Description of problem
Are the safety master
modules on the same
base connected with a
CC-Link dedicated
cable?
Unable to receive inputs
from a remote station/
Unable to output data
from a remote station
Has an error occurred on
the remote station?
9
- 4 9.1 Checking the Condition by Each Problem
Check item Check procedure
Check if the safety master
modules on the same base
are connected via CC-Link
or not.
Reset the safety CPU on the
safety master station, or turn
the power OFF and then ON
and check if the "ERR" LED
on the safety master module
flashes.
Check if the "ERR" LED on
the remote station is
flashing or not.
Check result
Secure a normal
Connected
connection state.
Not connected Check other item.
"ERR" LED on the Take measures referring to
safety master module is Section 9.2 and 9.3 Check
ON or flashing. with LEDs.
Check other items. If all the
check results are normal, a
"ERR" LED on the hardware fault of the safety
safety master module is master module may be
OFF. probable. Contact your
local Mitsubishi
representative.
"ERR" LED on the
Perform troubleshooting for
remote station is ON or
the remote station.
flashing.
Check other items. If all the
check results are normal, a
hardware fault of the safety
"ERR." LED on the
master module or the
remote station is OFF.
remote module. Contact
your local Mitsubishi
representative.
Corrective action