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19 BUILT-IN I/O FUNCTION
19.1 High-speed Counter Function
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19
Special relay list
A list of special relays used for high-speed counters is provided below.
Special relays for individual channels
A list of special relays by high-speed counter channel is provided below.
R/W: Read or Write
R: Read only
Special relay Function Operation Default R/W
ON OFF
SM4500 High-speed counter operation (CH1) Operating Stopped OFF R
SM4501 High-speed counter operation (CH2)
SM4502 High-speed counter operation (CH3)
SM4503 High-speed counter operation (CH4)
SM4504 High-speed counter operation (CH5)
SM4505 High-speed counter operation (CH6)
SM4506 High-speed counter operation (CH7)
SM4507 High-speed counter operation (CH8)
SM4508 to
SM4515
Not used
SM4516 High-speed counter pulse density/Rotation speed measurement (CH1) Measuring Stopped OFF R
SM4517 High-speed counter pulse density/Rotation speed measurement (CH2)
SM4518 High-speed counter pulse density/Rotation speed measurement (CH3)
SM4519 High-speed counter pulse density/Rotation speed measurement (CH4)
SM4520 High-speed counter pulse density/Rotation speed measurement (CH5)
SM4521 High-speed counter pulse density/Rotation speed measurement (CH6)
SM4522 High-speed counter pulse density/Rotation speed measurement (CH7)
SM4523 High-speed counter pulse density/Rotation speed measurement (CH8)
SM4524 to
SM4531
Not used
SM4532 High-speed counter overflow (CH1) Has occurred Has not occurred OFF R/W
SM4533 High-speed counter overflow (CH2)
SM4534 High-speed counter overflow (CH3)
SM4535 High-speed counter overflow (CH4)
SM4536 High-speed counter overflow (CH5)
SM4537 High-speed counter overflow (CH6)
SM4538 High-speed counter overflow (CH7)
SM4539 High-speed counter overflow (CH8)
SM4540 to
SM4547
Not used
SM4548 High-speed counter underflow (CH1) Has occurred Has not occurred OFF R/W
SM4549 High-speed counter underflow (CH2)
SM4550 High-speed counter underflow (CH3)
SM4551 High-speed counter underflow (CH4)
SM4552 High-speed counter underflow (CH5)
SM4553 High-speed counter underflow (CH6)
SM4554 High-speed counter underflow (CH7)
SM4555 High-speed counter underflow (CH8)
SM4556 to
SM4563
Not used