Mitsubishi Electric MELSEC Q Series User Manual page 481

(2) Redundant power supply module information
Number Name
Power supply off
SM1780
detection flag
Power supply
SM1781 failure detection
flag
Momentary
power failure
SM1782
detection flag for
*1
power supply 1
Momentary
power failure
SM1783
detection flag for
*2
power supply 2
*1 : Indicates the redundant power supply module mounted on the POWER 1 slot of the redundant base unit (Q38RB/Q68RB/Q65WRB).
*2 : Indicates the redundant power supply module mounted on the POWER 2 slot of the redundant base unit (Q38RB/Q68RB/Q65WRB).
Description
OFF: No redundant
power supply • Turns ON when one or more redundant power supply
module with
input power OFF • Turns on if any of SD1780 bits is on.
detected • Turns off if all bits of SD1780 are off.
ON: Redundant • This relay turns off when the main base unit is not the
power supply
module with • When the multiple CPU system is configured, the flags
input power OFF
detected
• Turns ON when one or more faulty redundant power
OFF: No faulty
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
ON: Faulty redundant
power supply
• When the multiple CPU system is configured, the flags
module detected
• Turns ON when a momentary power failure of the input
OFF: No momentary
power failure • Turns off the flags (SM1782 and SM1783) of the power
detected
ON: Momentary • When the input power to one of the redundant power
power failure
detected
• This relay turns off when the main base unit is not the
• When the multiple CPU system is configured, the flags
Detailed description
modules with input power OFF are detected.
redundant main base unit (Q38RB).
are stored only to the CPU No.1.
supply modules are detected.
redundant main base unit (Q38RB).
are stored only to the CPU No.1.
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.
supply 1 and 2 when the CPU module starts.
supply modules turns OFF the corresponding flag turns
OFF.
redundant main base unit (Q38RB).
are stored only to the CPU No.1.
APPENDICES
Setting side
(setting time)
S
(System)
S
(System)
A
S
(System)
479