Mitsubishi Electric MELSEC iQ-F FX5 User Manual page 152

■Update timing
The timing of device update is as follows.
ON
• When ON by the user
• When set to enabled with parameters
• Cannot be modified while the high-speed counter is operating. Operates in the configured status when the
high-speed counter starts.
• When the current value of a high-speed counter is rewritten with the HCMOV/DHCMOV instruction, the
comparison process is not executed.
• When the preset control switch is set to "Constant when ON", the preset input comparison is disabled.
High-speed counter enable input logic
These devices are used for setting the enable input logic.
■Corresponding devices
The device numbers corresponding to each channel are as follows.
CPU module
CH1 CH2
SM4628 SM4629
High-speed pulse input/output module
First module
CH9 CH10
SM4636 SM4637
■Operation Description
The content of the operation when ON and when OFF is as follows.
Operation when ON
The enable input operates with negative logic
(Enabled when the enable input is OFF)
These devices also operate when the FX3 compatible high-speed counter function is valid.
■Update timing
The timing of device update is as follows.
ON
• When ON by the user
• When set to negative logic with parameters
Cannot be modified while the high-speed counter is operating. Operates in the configured status when the
high-speed counter starts.
19 HIGH-SPEED INPUT/OUTPUT FUNCTION
150
19.1 High-speed Counter Function
CH3 CH4
SM4630 SM4631
Second module
CH11 CH12
SM4638 SM4639
OFF
• When OFF by the user
• When set to disabled with parameters
CH5 CH6
SM4632 SM4633
Third module
CH13 CH14
SM4640 SM4641
Operation when OFF
The enable input operates with positive logic
(Enabled when the enable input is ON)
OFF
• When OFF by the user
• When set to positive logic with parameters
CH7 CH8
SM4634 SM4635
Fourth module
CH15 CH16
SM4642 SM4643