Mitsubishi Electric FX5 - Special Relay Details

24 HIGH-SPEED INPUT/OUTPUT FUNCTION
24.1 High-speed Counter Function
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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/DSPD
instruction operates.
CPU module
CH1 CH2 CH3 CH4 CH5 CH6 CH7 CH8
SM4500 SM4501 SM4502 SM4503 SM4504 SM4505 SM4506 SM4507
High-speed pulse input/output module
First module Second module Third module Fourth module
CH9 CH10 CH11 CH12 CH13 CH14 CH15 CH16
SM4508 SM4509 SM4510 SM4511 SM4512 SM4513 SM4514 SM4515
Operation when ON Operation when OFF
High-speed counter operating High-speed counter stopped
ON OFF
• High-speed counter driven by the HIOEN/DHIOEN instruction
• SPD/DSPD 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/DHIOEN 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