Special relay
Function
SM4548
High-speed counter underflow (CH1)
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
High-speed counter underflow (CH9)
SM4557
High-speed counter underflow (CH10)
SM4558
High-speed counter underflow (CH11)
SM4559
High-speed counter underflow (CH12)
SM4560
High-speed counter underflow (CH13)
SM4561
High-speed counter underflow (CH14)
SM4562
High-speed counter underflow (CH15)
SM4563
High-speed counter underflow (CH16)
SM4564
High-speed counter count direction monitor (CH1)
SM4565
High-speed counter count direction monitor (CH2)
SM4566
High-speed counter count direction monitor (CH3)
SM4567
High-speed counter count direction monitor (CH4)
SM4568
High-speed counter count direction monitor (CH5)
SM4569
High-speed counter count direction monitor (CH6)
SM4570
High-speed counter count direction monitor (CH7)
SM4571
High-speed counter count direction monitor (CH8)
SM4572
High-speed counter count direction monitor (CH9)
SM4573
High-speed counter count direction monitor (CH10)
SM4574
High-speed counter count direction monitor (CH11)
SM4575
High-speed counter count direction monitor (CH12)
SM4576
High-speed counter count direction monitor (CH13)
SM4577
High-speed counter count direction monitor (CH14)
SM4578
High-speed counter count direction monitor (CH15)
SM4579
High-speed counter count direction monitor (CH16)
Operation
ON
OFF
Has occurred
Has not occurred
Down-counting
Up-counting
24 HIGH-SPEED INPUT/OUTPUT FUNCTION
24.1 High-speed Counter Function
Default
R/W
OFF
R/W
OFF
R
24
211