Mitsubishi Electric MELSEC Q Series User Manual page 488

Number Name
Momentary
power failure
detection
SD1782
counter for
*1
power supply 1
Momentary
power failure
detection
SD1783
counter for
*2
power supply 2
*1 : Indicates the redundant power supply module mounted on the POWER 1 slot of the redundant base unit (Q38RB/68RB/).
*2 : Indicates the redundant power supply module mounted on the POWER 2 slot of the redundant base unit (Q38RB/68RB/).
486
Description
• Counts the number of times of momentary power failure of the
Momentary
power supply 1/2.
power failure
• Monitors the status of the power supply 1/ 2 mounted on the
detection count
redundant power main base unit (Q38RB) and counts the number of
for power supply
times of momentary power failure.
1
Status of power supply 1/power supply 2 mounted on the redundant
extension base unit is not monitored.
• When the CPU module starts, the counter of the power supply 1/ 2
is cleared to 0.
• If the input power to one of the redundant power supply modules is
turned OFF, the corresponding counter is cleared to 0.
Momentary
• The counter is incremented by one upon momentary power failure
power failure
on the power supply 1 or 2. (The counter repeats increment and
detection count
decrement of the value; 0  32767  32768  0 .
for power supply
(The value is displayed within the range of 0 to 65535 in the system
2
monitor screen of programming tool.))
• "0" is stored when the main base unit is not the redundant main
base unit (Q38RB).
• When configuring multiple CPU, the status is stored to 1st CPU
module.
Detailed description
Setting side
(setting time)
S
(System)