Mitsubishi Electric MELSEC iQ-F FX5 Programming Manual page 715

• The counted number of scans is stored among SD8330 to SD8334 in accordance with the special relay of the timing clock
output destination specified by (d).
• The counted number of scans stored among SD8330 to SD8334 is reset when the counted value reaches "(n1)+(n2)" or
when the command input (instruction) is set to on.
Special relay (d) for outputting the timing clock
SM420(SM8330)
SM421(SM8331)
SM422(SM8332)
SM423(SM8333)
SM424(SM8334)
• When the command input is set to ON, the operation is started. The special relay of the timing clock output destination is
set to ON or OFF by the END instruction. Even if the command input is set to OFF, the operation is not stopped. In the
STOP mode, the operation is stopped. When the power to the CPU module is turned OFF, the operation is stopped.
• When (n1) and (n2) are set to "0", the status is as shown below:
Status of (n1) and (n2)
(n1)=0, (n2)0
(n1)>0, (n2)=0
• The table below shows the related devices.
Special relay Name
SM420(SM8330) Timing clock output 1
SM421(SM8331) Timing clock output 2
SM422(SM8332) Timing clock output 3
SM423(SM8333) Timing clock output 4
SM424(SM8334) Timing clock output 5
Special register Name
SD8330 Counted number of scans for timing clock output 1
SD8331 Counted number of scans for timing clock output 2
SD8332 Counted number of scans for timing clock output 3
SD8333 Counted number of scans for timing clock output 4
SD8334 Counted number of scans for timing clock output 5
Precautions
• The DUTY instruction can be used up to 5 times (points). It is not permitted, however, to use the same timing clock output
destination device for two or more DUTY instructions.
Operation error
Error code Description
(SD0/SD8067)
2820H The device specified by (d) is out of the range from SM420 to SM424 (SM8330 to SM8334).
3405H The value specified by (n1), (n2) is other than 0 to 32767.
Scan counting device
SD8330
SD8331
SD8332
SD8333
SD8334
ON/OFF status of (d)
(d)= Fixed to OFF
(d)= Fixed to ON
Description
Timing clock output in the DUTY instruction
Description
Counted number of scans for timing clock output 1 in the DUTY
instruction
Counted number of scans for timing clock output 2 in the DUTY
instruction
Counted number of scans for timing clock output 3 in the DUTY
instruction
Counted number of scans for timing clock output 4 in the DUTY
instruction
Counted number of scans for timing clock output 5 in the DUTY
instruction
8 APPLICATION INSTRUCTION
8.25 Timing Check Instruction
8
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