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(18) Redundant power supply module information
SD1780 to SD1789 are valid only for a redundant power supply system.
The bits are all 0 for a singular power supply system.
Number
Name
Meaning
Power supply
Power supply off
SD1780
off detection
detection status
status
Power supply
Power supply
SD1781
failure detection
failure detection
status
status
Momentary
power failure
Momentary power
detection
failure detection
SD1782
counter for
count for power
power supply
supply 1
*1
1
Momentary
power failure
Momentary power
detection
failure detection
SD1783
counter for
count for power
power supply
supply 2
*1
2
*1: The "power supply 1" in dicates the redundant power supply module mounted on the POWER 1 slot of the redundant base unit (Q38RB/68RB/Q65WRB).
The "power supply 2" indicates the redundant power supply module mounted on the POWER 2 slot of the redundant base unit (Q38RB/68RB/Q65WRB).
*2: The module whose first 5 digits of serial No. is "07032" 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.
*3: The module whose first 5 digits of serial No. is "10042" or later.
Table12.37 Special register
Explanation
• Stores the status of the redundant power supply module with input
power OFF in the following bit pattern.
• Stores 0 when the main base unit is not the redundant power main base
unit (Q38RB).
Input power OFF
Input power OFF
detection status of
detection status of
1
power supply 2
power supply 1
b15
to
b9
b8
b7
to
b1
SD1780
to
to
• When configuring multiple CPU, the status is stored to 1st CPU module.
• Stores the failure detection status of the redundant power supply module
in the following bit pattern. (The corresponding bit is cleared to 0 when
the input power to the faulty redundant power supply module is switched
OFF after detection of the redundant power supply module failure.)
• Stores 0 when the main base unit is not the redundant power main base
unit (Q38RB).
Failure detection
Failure detection
status of power
status of power
1
1
supply 2
supply 1
b15
to
b9
b8
b7
to
b1
SD1781
to
to
• When configuring multiple CPU, the status is stored to 1st CPU module.
• Counts the number of times of momentary power failure of the power
supply 1/2.
• Monitors the status of the power supply 1/ 2 mounted on the redundant
power main base unit (Q38RB) and counts the number of times of
momentary power failure.
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.
The counter is incremented by 1 every time the momentary power failure of
the power supply 1/ 2 is detected.(The counter repeats increment and
decrement of the value; 0
32767
– 32768
of GX Developer shows the counter within the range between 0 and 65535.
• Stores 0 when the main base unit is not the redundant power main base
unit (Q38RB).
• When configuring multiple CPU, the status is stored to 1st CPU module.
• The counter repeats increment and decrement of the value, 0
– 32768
0
(The system monitor of GX Developer shows the counter within the
range between 0 and 65535.
CHAPTER12 PECIAL RELAY LIST AND SPECIAL REGISTER LIST
Set by
(When Set)
1
Each bit
0: Input power ON status/ No
redundant power supply
b0
module
S(Every END)
1: Input power OFF status
Main base unit
Extension base unit 1st stage
:
Extension base unit 7th stage
Main base unit
Extension base unit 1st stage
:
Extension base unit 7th stage
Each bit
0: Redundant power supply
module failure not
b0
detected/No redundant power
S(Every END)
supply module
1: Redundant power supply
module failure detected
(Detectable for redundant
power supply module only)
Main base unit
Extension base unit 1st stage
:
Extension base unit 7th stage
Main base unit
Extension base unit 1st stage
:
Extension base unit 7th stage
S(Every END)
0 (The system monitor
S(Every END)
32767
Corres-
ponding
Corresponding
ACPU
CPU
D9
New
New
*2
Qn(H)
*2
QnPH
QnPRH
*3
QnU
New
New
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