Mitsubishi Electric melsec q00ujcpu User Manual page 475

Number Name
SM415 2n (ms) clock
SM420 User timing clock No.0
SM421 User timing clock No.1
SM422 User timing clock No.2
SM423 User timing clock No.3
SM424 User timing clock No.4
SM430 User timing clock No.5
SM431 User timing clock No.6
SM432 User timing clock No.7
SM433 User timing clock No.8
SM434 User timing clock No.9
(4) Scan information
Number Name
Low speed program
SM510
execution flag
Reads module service
SM551
interval
(5) I/O refresh
Number Name
Program to program I/
SM580
O refresh
*1: This applies to the CPU of function version B or later.
12 - 9
Table12.4 Special relay
Meaning
• This relay alternates between ON and OFF at
intervals of the time (unit: ms) specified in SD415.
• When Programmable Controller power supply is
turned ON or a CPU module reset is performed,
n(ms)
n(ms) goes from OFF to start.
(Note that the ON-OFF status changes when the
designated time has elapsed during the execution of
the program.)
• Relay repeats ON/OFF switching at fixed scan
intervals.
• When Programmable Controller power supply is
turned ON or a CPU module reset is performed,
goes from OFF to start.
(For the redundant CPU, however, this relay is
always OFF after system switching.)
• The ON/OFF intervals are set with the DUTY
instruction
n2 scan n2 scan
n1 scan
n1: ON scan interval
n2: OFF scan interval
• For use with SM420 to SM424 low speed programs
Table12.5 Special relay
Meaning
OFF : Completed or not
• Goes ON when low speed execution type program is
executed
executed.
ON : Execution under way.
• When this relay goes from OFF to ON, the module
OFF : Ignored
service interval designated by SD550 is read to
ON : Read
SD551 to SD552.
Table12.6 Special relay
Meaning
• When this special relay is turned ON, I/O refresh is
performed after execution of the first program, and
the next program is then executed.
OFF : Not refreshed
When a sequence program and an SFC program are
ON : Refreshed
to be executed, the sequence program is executed,
I/O refresh is performed, and the SFC program is
then executed.
Explanation
S (Status change)
DUTY n1 n2 SM420
Explanation
Explanation
Corres-
ponding
Set by Corresponding
(When Set) ACPU
M9
New
M9020
M9021
M9022
M9023
S (Every END
processing)
M9024
S (Every END
New
processing)
Corres-
ponding
Set by Corresponding
ACPU
(When Set)
M9
S (Every END
New
processing)
U New
Corres-
ponding
Set by Corresponding
ACPU
(When Set)
M9
U New
Q00J/Q00/Q01
CPU
Qn(H)
QnPH
QnPRH
QnU
QCPU
Qn(H)
QnPH
CPU
Qn(H)
QnPH
Qn(H)
QnPH
QnPRH
CPU
*1