APPX
Appendix 4 List of Special Relay Areas
811
A
*1 The following figures show operation examples of SM414/SM415 when a value in SD414/SD415 is changed.
When a value in SD414 is changed from 3 to 10:
(1) The elapsed time after the ON/OFF state of SM414 changes remains.
(2) Value change
SM415 2n millisecond clock • This relay repeats on/off at regular
intervals specified in units of milliseconds
on the SD415. (When the value in SD415
is changed, the elapsed time count that
has started when the ON/OFF state of
SM415 last changed continues, and the
ON/OFF state changes when the new
specified time is elapsed.
*1
)
• The initial state when CPU module is
powered on or reset is off.
• This relay switches to on or off after a
specified time is elapsed even when the
program execution is in progress.
S (Status change) ALL
SM420 User timing clock No.0 • This relay repeats on/off at specified scan
intervals.
• The initial state when CPU module is
powered on or reset is off.
• The on/off scan interval is set using the
DUTY instruction. (n1: ON scan interval,
n2: OFF scan interval)
S (Every END) ALL
SM421 User timing clock No.1 ALL
SM422 User timing clock No.2 ALL
SM423 User timing clock No.3 ALL
SM424 User timing clock No.4 ALL
SM440 On only initial I44 execution
after RUN
• This relay is on during the first execution
of the inter-module synchronous interrupt
program (I44) after RUN mode starts and
off during the second execution onwards.
• Note that the relay status while the DI
instruction is executed is as follows: On
during the first execution of the inter-
module synchronous interrupt program
(I44) after the DI instruction is cleared and
Off during the second execution onwards.
(no change after the second DI clear).
• This contact is enabled only for the inter-
module synchronous interrupt program.
S (Power-on to RUN
or STOP to RUN)
Rn
RnP
RnSF
SM441 On only initial I45 execution
after RUN
• This relay is on during the first execution
of the multiple CPU synchronous interrupt
program (I45) after RUN mode starts and
off during the second execution onwards.
• Note that the relay status while the DI
instruction is executed is as follows: On
during the first execution of the multiple
CPU synchronous interrupt program (I45)
after the DI instruction is cleared and Off
during the second execution onwards. (no
change after the second DI clear).
• This contact is enabled only for the
multiple CPU synchronous interrupt
program.
S (Power-on to RUN
or STOP to RUN)
Rn
RnP
RnSF
No. Name Data stored Details Set by (setting
timing)
CPU
n ms
n ms
n1
n2
scan
scan
SM414
SD414
ON
OFF
103
10s
10s3s3s
(1)
(2)
To Next Page
Loading...
