Mitsubishi MELSEC Q Series

App-184
(15) Redundant power supply module information
*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.
Number
Name Meaning Explanation
Set by
(When Set)
Corres-
ponding
ACPU
M9
Corres-ponding
CPU
SM1780
Power supply off
detection flag
OFF : No redundant
power supply
module with
input power OFF
detected
ON : Redundant
power supply
module with
input power OFF
detected
• Turns ON when one or more redundant
power supply modules with input power
OFF are detected.
• Turns on if any of SD1780 bits is on.
• Turns off if all bits of SD1780 are 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.
S (Every END
processing)
New
Qn(H)
*3
QnPH
*3
QnPRH
QnU
*4
SM1781
Power supply
failure detection
flag
OFF : No faulty
redundant power
supply module
detected
ON : Faulty redundant
power supply
module detected
• Turns ON when one or more faulty
redundant power supply modules are
detected.
• Turns on if any of SD1781 bits is on.
• Turns off if all bits of SD1781 are 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.
SM1782
Momentary power
failure detection
flag for power
supply 1
*1
OFF : No momentary
power failure
detected
ON : Momentary
power failure
detected
• 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.
• Turns off the flags (SM1782 and SM1783)
of the power supply 1 and 2 when the CPU
module starts.
• When the input power to one of the
redundant power supply modules turns
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.
SM1783
Momentary power
failure detection
flag for power
supply 2
*2