Filter
Top Products
140
19 BUILT-IN I/O FUNCTION
19.1 High-speed Counter Function
Special relay details
Details concerning special relays used for high-speed counters are explained below.
High-speed counter operating
Device for monitoring operation status of each channel of the high-speed counter.
■Corresponding devices
The device numbers corresponding to each channel are as follows.
■Operation Description
The content of the operation when ON and when OFF is as follows.
These devices also operate when the FX3 compatible high-speed counter function is valid.
■Update timing
The timing of device update is as follows.
High-speed counter pulse density/rotational speed being measured
Device for monitoring operation of the high-speed counter when using pulse density/rotational speed measurement mode.
■Corresponding devices
The device numbers corresponding to each channel are as follows.
■Operation Description
The content of the operation when ON and when OFF is as follows.
If the FX3 compatible high-speed counter function is valid, these devices operate only when the SPD
instruction operates.
■Update timing
The timing of device update is as follows.
CH1 CH2 CH3 CH4 CH5 CH6 CH7 CH8
SM4500 SM4501 SM4502 SM4503 SM4504 SM4505 SM4506 SM4507
Operation when ON Operation when OFF
High-speed counter operating High-speed counter stopped
ON OFF
• High-speed counter driven by the HIOEN instruction
• SPD instruction ON execution
• UDCNTF instruction is executed ON (when the FX3 compatible high-speed
counter function is valid)
• High-speed counter stopped by the HIOEN instruction
• Power ON, reset, STOP, PAUSE
• UDCNTF instruction is executed OFF (when the FX3 compatible high-
speed counter function is valid)
CH1 CH2 CH3 CH4 CH5 CH6 CH7 CH8
SM4516 SM4517 SM4518 SM4519 SM4520 SM4521 SM4522 SM4523
Operation when ON Operation when OFF
Pulse density/rotational speed measurement mode operating
Updates measurement results by measuring unit time.
Pulse density/rotational speed measurement mode stopped or not being used
ON OFF
• Pulse density/rotational speed measurement mode is set in parameter and
pulse density/rotational speed measurement is driven by the HIOEN
instruction.
• SPD instruction ON execution
• Pulse density/rotational speed measurement mode is set in parameter and
pulse density/rotational speed measurement is stopped by the HIOEN
instruction.
• Power ON, reset, STOP, PAUSE