Filter
Top Products
6 CLOCK FUNCTION
6.3 System clock
49
6
6.3 System clock
There are two types of system clocks, one is to execute ON/OFF by the system and the other is to execute ON/OFF in the
intervals specified by the user.
Special relay used for system clock
Special relays used for system clock are as follows.
Special register used for system clock
Special registers used for system clock are as follows.
SM420 to SM424, SM8330 to SM8334, and SD8330 to SD8334 are used by the DUTY instruction.
For the DUTY instruction, refer to the following.
MELSEC iQ-F FX5 Programming Manual (Instructions, Standard Functions/Function Blocks)
Special relay Name
SM400, SM8000 Always ON
SM401, SM8001 Always OFF
SM402, SM8002 After RUN, ON for one scan only
SM403, SM8003 After RUN, OFF for one scan only
SM409, SM8011 0.01 second clock
SM410, SM8012 0.1 second clock
SM411 0.2 second clock
SM412, SM8013 1 second clock
SM413 2 second clock
SM414 2n second clock
SM415 2n ms clock
SM8014 1 min clock
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
SD412 One second counter
SD414 2n second clock setting
SD415 2n ms clock setting
SD420 Scan counter
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