Mitsubishi Electric MELSEC iQ-R Series - Page 659

APPX
Appendix 4 List of Special Relay Areas
657
A
SM756 Module access
completion wait control
flag
Off: Not wait the completion
On: Waits the completion
This relay can be used to determine whether the system
must wait until the access is completed before starting the
next instruction when the write access instruction to the
buffer memory of another module is being executed.
U
SM775 Selection of refresh
processing during the
COM instruction
execution
Off: Executes all the refresh
processing
On: Executes the refresh processing
specified in SD775
This relay can be used to select the refresh processing
target when the COM instruction is executed from two
options: all refresh processing or only refresh processing
specified in SD775.
U
SM776 Local device setting at
CALL
Off: Disables local devices
On: Enables local devices
This relay can be used to determine whether the local
devices on the subroutine program called when the CALL
instruction is being executed are enabled or not.
U
SM777 Local device setting in
interrupt programs
Off: Disables local devices
On: Enables local devices
This relay can be used to determine whether the local
devices are enabled or not when the interrupt program is
being executed.
U
SM792 PID bumpless
processing (for the
complete differentiation
PIDCONT instruction)
Off: Matching
On: Not matching
This relay can be used to specify whether to match SV to
PV in manual mode.
U
SM794 PID bumpless
processing (for the
inexact differential
S.PIDCONT
instruction)
Off: Matching
On: Not matching
This relay can be used to specify whether to match SV to
PV in manual mode.
U
SM796 Number of used blocks
information for the
multiple CPU dedicated
instruction (for CPU
No.1)
Off: The specified number of blocks
is reserved
On: The number of blocks specified
in SD796 is not reserved
• This relay switches to on when the number of remaining
blocks in the dedicated instruction transfer area to be
used in the multiple CPU dedicated instruction (target
machine: CPU No.1) drops below the number of blocks
specified in SD796. This relay is also on when the
instruction is being executed.
• This relay switches to off when there exist free blocks
during the END processing.
S (Instruction
execution/During
END)
SM797 Number of used blocks
information for the
multiple CPU dedicated
instruction (for CPU
No.2)
Off: The specified number of blocks
is reserved
On: The number of blocks specified
in SD797 is not reserved
• This relay switches to on when the number of remaining
blocks in the dedicated instruction transfer area to be
used in the multiple CPU dedicated instruction (target
machine: CPU No.2) drops below the number of blocks
specified in SD797. This relay is also on when the
instruction is being executed.
• This relay switches to off when there exist free blocks
during the END processing.
S (Instruction
execution/During
END)
SM798 Number of used blocks
information for the
multiple CPU dedicated
instruction (for CPU
No.3)
Off: The specified number of blocks
is reserved
On: The number of blocks specified
in SD798 is not reserved
• This relay switches to on when the number of remaining
blocks in the dedicated instruction transfer area to be
used in the multiple CPU dedicated instruction (target
machine: CPU No.3) drops below the number of blocks
sp
e
cified in SD798. This relay is also on when the
instruction is being executed.
• This relay switches to off when there exist free blocks
during the END processing.
S (Instruction
execution/During
END)
SM799 Number of used blocks
information for the
multiple CPU dedicated
instruction (for CPU
No.4)
Off: The specified number of blocks
is reserved
On: The number of blocks specified
in SD799 is not reserved
• This relay switches to on when the number of remaining
blocks in the dedicated instruction transfer area to be
used in the multiple CPU dedicated instruction (target
machine: CPU No.4) drops below the number of blocks
specified in SD799. This relay is also on when the
instruction is being executed.
• This relay switches to off when there exist free blocks
during the END processing.
S (Instruction
execution/During
END)
SM816 Hold mode (S.IN
instruction)
Off: Value not held
On: Value held
Whether to hold the output value or not is specified when
the input value is found to be exceeding the valid range
during the range check processing of the S.IN instruction.
U
SM817 Hold mode (S.OUT
instruction)
Off: Value not held
On: Value held
This relay is used to specify whether or not to hold the
output values of the S.OUT1, S.OUT2, and S.DUTY
instructions if a sensor error occurs.
U
No. Name Data stored Details Set by (setting
timing)