Mitsubishi Electric MELSEC iQ-R Series - SFC Information; System Clock; Fixed Scan Function Information

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APPX
Appendix 5 List of Special Register Areas
SFC information
The following is the special register area relating to SFC information.
*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)
System clock
The following is the list of special register areas relating to the system clock.
Fixed scan function information
The following is the list of special register areas relating to the fixed scan function information.
No. Name Data stored Details Set by (setting
timing)
SD329 Online change (SFC
block) target block
number
*1
SFC block number • A target SFC block number is stored while the online change
(SFC block) is being executed (SM329 = ON).
• FFFFH is stored when the online change (SFC block) is not
executed.
S (Status change)
No. Name Data stored Details Set by (setting
timing)
SD412 One second counter The number of counts that is
counted once per second.
• The value in this register increments by one for each second
after the CPU module enters in RUN mode.
• A counting cycle from 0 to 65535 to 0 is repeated.
S (Status change)
SD414 2n second clock setting Unit setting for 2n second
clock
• The n value of the 2n second clock is stored (Default: 30).
• Configurable range is -32768 to 32767 (0 to FFFFH).
U
SD415 2n ms clock setting Unit setting for 2n ms clock • The n value for the 2n ms clock is stored. (Default: 30).
• Configurable range is -32768 to 32767 (0 to FFFFH).
U
SD420 Scan counter The number of counts that is
counted once for each scan.
• The value in this register increments by one for each scan
after the CPU module enters in RUN mode (however, the
count is skipped for scans by the initial execution type
program).
• A counting cycle from 0 to 65535 to 0 is repeated.
S (Every END)
No. Name Data stored Details Set by (setting
timing)
SD480 Number of cycle overrun
events for inter-module
synchronization cycle
program (I44)
0: No cycle overrun event
1 to 65535: Accumulated
number of cycle overrun
events
The number of events in which the inter-module synchronous
interrupt program (I44) has not been completed within the inter-
module synchronization cycle or the program cannot be
executed due to various reasons, such as execution of a higher-
priority interrupt program and interrupt disabling by the
instruction execution is stored. When the count exceeds 65535,
it returns to 0 and starts a new cycle. The number of cycle
overrun events is counted regardless of the setting content for
the error check setting of the RAS setting (execution check of
the inter-module synchronous interrupt (I44)).
S (Status change)
SD481 Number of cycle overrun
events for multiple CPU
synchronization program
(I45)
0: No cycle overrun event
1 to 65535: Accumulated
number of cycle overrun
events
The number of events in which the multiple CPU
synchronization program (I45) has not been completed within
the fixed scan communication cycle or the program cannot be
executed due to various reasons, such as execution of a higher-
priority interrupt program and interrupt disabling by the
instruction execution is stored. When the count exceeds 65535,
it returns to 0 and starts a new cycle. The number of cycle
overrun events is counted regardless of the setting content for
the error check setting of the RAS setting (execution check of
the multiple CPU synchronization program (I45)).
S (Status change)
SD484 Number of execution
section excess errors for
multiple CPU
synchronization interrupt
program
0: No error (Normal)
1 to 65535: Accumulated
number of errors
The number of events in which the program is executed
exceeding the program execution section within the specified
multiple CPU synchronization cycle is stored. When the count
exceeds 65535, it returns to 0 and starts a new cycle. Note that
the number of error occurrences is counted regardless of the
CPU module operation setting for error detections within the
RAS setting of the CPU parameter.
S (Status change)
SD500 Execution program
number
Execution program number The program number which is currently executed is stored as a
BIN value.
S (Status change)