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DESCRIPTIONDESIGNDATE
EDIT
Power Failure Back-up Module
(with control power backup function)
DESCRIPTIONS
TMS01/032E
8.2.6 Sequence when Alarm Occurs
Some alarm occurs on Power Failure Backup Module.
Alarm
*ALM (CX16 B1)
RDY (CX16 B3)
LED indication “0” Indicate alarm number
System status Normal operation Machine stop Machine stop
operation
MCC ON OFF
In case that the alarm occurs at Power Failure Backup Module, the alarm number is indicated on
the 7-segment LED display and *ALM in CX16 goes “0”.
After the alarm occurs at Power Failure Backup Module, the machine continues the normal
operation, because the power of motors are not cut off forcibly by this alarm. But Power Failure
Backup Module can not be operated normally in the power failure on the condition of alarm.
So, when *ALM goes “0”, stop the machine operation safely and turn off the MCC immediately to
protect Power Failure Backup Module.
See “8.4 Alarms” for description and cause of alarms.
RDY Signal
RDY signal changes from “0” to “1” when charging to Sub Module C is completed.
RDY signal changes from “1” to “0” in following cases.
(1) When alarm occurs at Power Failure Backup Module.
(2) When *CRDY goes “1”. (When MCC is turned off)
If RDY changes from “1” to “0” during the machine operation (*CRDY=0) though no alarm
occurs at Power Failure Backup Module, something is wrong with Power Failure Backup
Module.
In this case stop the machine operation safely and turn off the MCC immediately to protect
Power Failure Backup Module.