Mitsubishi Electric MELSEC iQ-R Series - Page 681

APPX
Appendix 5 List of Special Register Areas
679
A
*1 There are restrictions on the firmware version of the CPU module and software version of the engineering tool. ( Page 747 Added
and Enhanced Functions)
SD151 Power supply
failure detection
status
Power supply failure detection
status (bit pattern)
0: Not detected/power-off/no
power supply module
1: Detected
• For the redundant power supply base unit or redundant extension
base unit, failure detection status of the power supply module is
stored using the following bit pattern.
• Bits corresponding to power-off or empty slots for the power
supply module turn off.
• In a multiple CPU system, the status is stored only to the CPU
module No.1.
• In a redundant system with redundant extension base unit, if a
failure of a power supply module on an extension base unit, the
state is stored only in the CPU module of the control system, but
not stored in the CPU module of the standby system.
(1) Failure detection status of the power supply module 1
b0: Main base unit
b1 to b7: 1st to 7th level of the extension base unit
(2) Failure detection status of the power supply module 2
b8: Main base unit
b9 to b15: 1st to 7th level of the extension base unit
S (Status
change)
SD152 Momentary
power failure
detection count
(power supply
module 1)
Momentary power failure
detection count for power
supply module 1
• This register counts the number of momentary power failures.
• This register monitors the status of the power supply module
mounted on the main base unit and counts the number of
momentary power failures.
• When the CPU module starts up, the counters of the both power
supplies are cleared to 0.
• When one of the two power supply is powered off, the
corresponding counter to the one powered off is cleared to 0.
• The counter is incremented by one upon one momentary power
failure on each power supply. A counting cycle from 0 to 65535 to
0 is repeated.
• In a multiple CPU system, the status is stored only to the CPU
module No.1.
S (Status
change)
SD153 Momentary
power failure
detection count
(power supply
module 2)
Momentary power failure
detection count for power
supply module 2
S (Status
change)
SD154 Details of the
invalid power
supply module
Details of the invalid power
supply module (bit pattern)
0: Valid/power-off/no power
supply module
1: Invalid
• For the redundant power supply base unit or redundant extension
base unit, when an invalid power supply module exists, the status
is stored using the following bit pattern.
• Bits corresponding to power-off or empty slots for the power
supply module turn off.
• In a multiple CPU system, the status is stored only to the CPU
module No.1.
• In a redundant system with redundant extension base unit, if an
invalid power supply module is detected on an extension base
unit, the state is stored only in the CPU module of the control
system, but not stored in the CPU module of the standby system.
(1) Details of the invalid power supply module 1
b0: Main base unit
b1 to b7: 1st to 7th level of the extension base unit
(2) Details of the invalid power supply module 2
b8: Main base unit
b9 to b15: 1st to 7th level of the extension base unit
S (Status
change)
No. Name Data stored Details Set by
(setting
timing)
b0b15
(2) (1)
b7 b1 b2 b8 b9
b0b15
(2) (1)
b7 b1 b2 b8 b9