Mitsubishi MELSEC Q Series Programming Manual page 1192

(15) Redundant power supply module information
Number
Name
Power supply off
SM1780
detection flag
Power supply
SM1781 failure detection
flag
Momentary power
failure detection
SM1782
flag for power
*1
supply 1
Momentary power
failure detection
SM1783
flag for power
*2
supply 2
*1: The "power supply 1" indicates the redundant power supply module mounted on the POWER 1 slot of the redundant base
unit (Q38RB/Q68RB/Q65WRB).
*2:The "power supply 2" indicates the redundant power supply module mounted on the POWER 2 slot of the redundant base
unit (Q38RB/Q68RB/Q65WRB).
*3:The module whose first 5 digits of serial No. is "04012" or later.
However, for the multiple CPU system configuration, this applies to all CPU modules whose first 5 digits of serial No. are
"07032" or later.
*4:The module whose first 5 digits of serial No. is "10042" or later.
App-184
Meaning
• Turns ON when one or more redundant
OFF : No redundant
power supply modules with input power
power supply
OFF are detected.
module with
• Turns on if any of SD1780 bits is on.
input power OFF
• Turns off if all bits of SD1780 are off.
detected
• This relay turns off when the main base
ON : Redundant
unit is not the redundant main base unit
power supply
(Q38RB).
module with
• When the multiple CPU system is
input power OFF
configured, the flags are stored only to the
detected
CPU No.1.
• Turns ON when one or more faulty
redundant power supply modules are
OFF : No faulty detected.
redundant power • Turns on if any of SD1781 bits is on.
supply module • Turns off if all bits of SD1781 are off.
detected • This relay turns off when the main base
ON : Faulty redundant unit is not the redundant main base unit
power supply (Q38RB).
module detected • When the multiple CPU system is
configured, the flags are stored only to the
CPU No.1.
• Turns ON when a momentary power failure
of the input power supply to the power
supply 1 or 2 is detected one or more
times. After turning on, this relay remains
on even if the power supply recovers from
the momentary power failure.
OFF : No momentary • Turns off the flags (SM1782 and SM1783)
power failure of the power supply 1 and 2 when the CPU
detected module starts.
ON : Momentary • When the input power to one of the
power failure redundant power supply modules turns
detected
OFF the corresponding flag turns OFF.
• This relay turns off when the main base
unit is not the redundant main base unit
(Q38RB).
• When the multiple CPU system is
configured, the flags are stored only to the
CPU No.1.
Explanation
Corres-
Set by ponding Corres-ponding
(When Set) ACPU
M9
S (Every END
New
processing)
CPU
*3
Qn(H)
*3
QnPH
QnPRH
*4
QnU