Mitsubishi Electric MELSEC iQ-R Series - Page 649

APPX
Appendix 4 List of Special Relay Areas
647
A
SM61 I/O module verification
error
Off: Normal
On: Error
• This relay switches to on when the state of the I/O module
is different from one registered during power-on, and the
ON state is maintained even after later recovering to the
normal state.
• I/O module verification is also done for modules on the
remote I/O station.
• In a redundant system with redundant extension base unit,
this relay is set as follows:
 If an I/O verification error occurs in a module on an
extension base unit, the on/off state is stored only in the
CPU module of the control system, but not stored in the
CPU module of the standby system.
 When the systems are switched, the state before system
switching is held.
 When the error is cleared, the CPU module of the
system where the error is cleared clears the value.
S (Error)
SM62 Annunciator Off: Not detected
On: Detected
• This relay switches to on when at least one annunciator is
turned on.
• This relay returns to off when all the annunciators are
turned off.
S (Instruction
execution)
SM80 Detailed information 1:
Flag in use
Off: Not used
On: In use
This relay switches to on if the detailed information n exists
when SM0 switched to on.
S (Status change)
SM112 Detailed information 2:
Flag in use
SM150 Power-off/power supply
voltage drop detection
Off: Power-on/normal power
supply voltage
On: Power-off/voltage drop
detected/power supply
module not mounted
• This relay turns on when one or more of the power supply
modules whose power has been shut off or power supply
voltage has dropped (not including a momentary power
failure), or one or more of empty slots for the power supply
module are detected on the redundant power supply base
unit or a redundant extension base unit.
• This relay turns on if causes to turn on any bits of SD150
have been occurred.
• This relay turns off if causes to turn on any bits of SD150
have been removed.
• In a multiple CPU system, the flags are stored only to the
CPU No.1.
• In a redundant system with redundant extension base unit,
if power-off or power supply voltage drop is detected in a
power supply module on an extension base unit, the on/off
state is stored only in the CPU module of the control
system, but not stored in the CPU module of the standby
system.
S (Status change)
SM151 Power supply module
failure detection
Off: Not detected/power-off/
no power supply module
On: Detected
• This relay turns on when one or more power supply module
failures have been detected on the redundant power supply
base unit or a redundant extension base unit.
• This relay turns on if causes to turn on any bits of SD151
have been occurred.
• This relay turns off if causes to turn on any bits of SD151
have been removed.
• In a multiple CPU system, the flags are stored only to the
CPU 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 on/off state is stored only in the CPU module of the
control system, but not stored in the CPU module of the
standby system.
S (Status change)
No. Name Data stored Details Set by (setting
timing)