Mitsubishi Electric FX5 User Manual page 235

Melsec iq-f series
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High-speed counter maximum value
These devices store the maximum values of the high-speed counters.
■Corresponding devices
The device numbers corresponding to each channel are as follows.
CPU module
CH1
CH2
SD4503,
SD4533,
SD4502
SD4532
High-speed pulse input/output module
First module
CH9
CH10
SD4743,
SD4773,
SD4742
SD4772
■Description
These devices stores the maximum values of the high-speed counters.
• To rewrite the maximum value, only the HCMOV/DHCMOV instruction can be used.
• If using the enable input, the maximum value is updated when the enable input is ON.
• These devices also operate when the FX3 compatible high-speed counter function is valid.
• If LC45 (CH3: Operation equivalent to C245), LC50 (CH4: Operation equivalent to C250) or LC55 (CH4:
Operation equivalent to C255) are used when the FX3 compatible high-speed counter function is valid,
special register is updated for the first time when enable input is ON. (After that, regardless of enable input,
special register is updated when the high-speed counter starts.)
■Update timing
When the current value of a high-speed counter exceeds the maximum value, the value is updated in END processing. When
the value is read using the HCMOV/DHCMOV instruction, it is first updated to the latest value and then read. Further, when
the FX3 compatible high-speed counter function is valid, the value is updated also when UDCNTF instruction is executed.
■Clear timing
The timing when the device is cleared is as follows.
• Power ON, Reset
CH3
CH4
SD4563,
SD4593,
SD4562
SD4592
Second module
CH11
CH12
SD4803,
SD4833,
SD4802
SD4832
CH5
CH6
SD4623,
SD4653,
SD4622
SD4652
Third module
CH13
CH14
SD4863,
SD4893,
SD4862
SD4892
24 HIGH-SPEED INPUT/OUTPUT FUNCTION
24.1 High-speed Counter Function
CH7
CH8
SD4683,
SD4713,
SD4682
SD4712
Fourth module
CH15
CH16
SD4923,
SD4953,
SD4922
SD4952
233
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