Mitsubishi Electric MELSEC iQ-R Series User Manual page 681

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