Operation Processing During Momentary Power Failure; Controller Module - Mitsubishi Electric MELSEC Q Series User Manual

(4) Related functions
The following indicates the related functions.
Function
Output (Y) setting for
switching from STOP to
RUN
Hardware error time CPU
operating mode setting
(5) Operation procedures
The operation status can be changed by remote operations from the RUN/STOP/MODE switch or Setting/
monitoring tools for the C Controller module.
Operation procedures
RUN/STOP/MODE switch
User program
Setting/monitoring tools for the C

Controller module

17.2.4

Operation processing during momentary power failure

The C Controller module detects a momentary power failure when the input power voltage supplied to the power
supply module falls below the specified range.
When a momentary power failure is detected, either of the following operations is performed.
(1) When momentary power failure time is within the allowable range
When a momentary power failure occurs, the output status is held and the operation stops.
After power is restored, the error information is registered to the event history file. (The initial time only)
(a) After recovering from a momentary power failure
The operation processing is resumed when the module recovers from a momentary power failure.
(b) Confirming the number of detections
The C Controller module counts how many time momentary power failure has been detected and holds the data.
The number of momentary power failure detections can be confirmed by the C Controller module dedicated
function (CCPU_GetPowerStatus) and special register SD53.
(2) When power failure lasts longer than the allowable momentary power failure time
Initial start is required for the C Controller module.
The processing executed at power-on and reset of C Controller module is performed.
 Page 305, Section 17.2.1
Note17.3
Q24DHCCPU-LS
The remote operation from a user program is not supported by Q24DHCCPU-LS and Q26DHCCPU-LS.
308
Selects the status after transition from STOP to RUN from the
following:
• Outputting the output status data before STOP.
• Clearing the output (Y) data.
Set whether to stop or run the C Controller module when a
hardware error occurs in an intelligent function module.
Note17.3
RUN status
RUN
Execute remote
RUN
Q26DHCCPU-LS
Description
Note17.3
Operation status
STOP status
STOP
Execute remote
STOP
Q24DHC-V Q24DHC-VG
For "-LS", consult with the
partner (operating system vendor).
Reference
Page 151, Section 11.1.5
Page 153, Section 11.1.7
Reference
PAUSE status
- Page 70, Section 6.2
Execute remote
Page 163, Section 11.5
PAUSE
Q24DHC-LS Q26DHC-LS Q12DC-V