Mitsubishi MELSEC L Series User Manual page 283

(15) Redundant power supply module information
Number Name
OFF : No redundant
Power supply off
SM1780
detection flag ON : Redundant
OFF : No faulty
Power supply
SM1781 failure detection
flag ON : Faulty redundant
Momentary power
failure detection
SM1782
flag for power
*1
supply 1
OFF : No momentary
ON : Momentary
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.
Meaning Explanation
• Turns ON when one or more 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
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
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
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.
• Turns off the flags (SM1782 and SM1783)
power failure of the power supply 1 and 2 when the CPU
detected module starts.
• 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.
APPENDICES
Corre-
Set by sponding Corresponding
(When Set) ACPU
M9
Qn(H)
S (Every END
QnPH
New
processing)
QnPRH
CPU
*3
*3
*4
QnU
A
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