Operating Status Leds - Mitsubishi MELESEC-ST User Manual

5 POWER DISTRIBUTION MODULES

5.3.1 Operating status LEDs

LED
indication
RUN
ERR.
SYS.
AUX.
5 - 12
LED status
On Normal
Flickering
Selected as a module to be replaced online.*1
(0.25s intervals)
Communication with the master station has stopped.*2
Flickering Parameter setting error *2
(1s intervals) Other slice module fault
Internal bus error occurring
Off External power supply off, hardware fault, internal bus error occurring
On Hardware fault
On (0.5s intervals) 24VDC voltage low
Off Normal
On Normal
Off 24VDC voltage low, 5VDC voltage low
On Normal
Off 24VDC voltage low
*1: The LED flickers when the module is selected as the target of online module
change.
Do not replace the power distribution module as it cannot be the target of online
module change.
*2: Refer to the head module manual for details.
Operating status
MELSEC-ST
5 - 12