Delta DVP-ES2 User Manual download pdf (Page 567)

100

101

3. Instruction Set

3-451

Freq.

Time

Gap freq.

Delayed by program scan cycle

Gap

time

Gap

time

Change target freq.

Actual timing of changing

2. If users change the target frequency by applying DICF instruction in insterupt subroutines, the

actual changing timing will be executed immediately with only an approx. 10us delay

(execution time of DICF instruction).

The timing diagram is as below:

Freq.

Time

Gap freq.

approx.10us

Gap

time

Gap

time

Interrupt

ctual timing of changing

Program Example:

1. When M0 = ON, pulse output ramps up to 100kHz. Total shifts: 100, Gap frequency: 1000Hz,

Gap time: 10ms. Calculation of total shifts: (100,000 ﹣0) ÷ 1000 = 100.

2. When X6 external interrupt executes, target frequency is changed and ramp down to 50kHz

immediately. Total shifts: 150, Gap frequency: 800Hz, Gap time: 20ms. Calculation of total

shifts: (100,000 ﹣50,000) ÷ 800 = 125

3. When X7 external interrupt executes, target frequency is changed and ramp down to 100Hz

immediately. Total shifts: 25, Gap frequency: 2000Hz, Gap time: 100ms. Calculation of total

shifts: (50,000 ﹣100) ÷ 2000 = 25.

4. When pulse output reaches 100Hz, the frequency is kept constant and pulse output stops

when 1,000,000 pulses is completed.

1 2 ... 562 563 564 565 566 567 568 569 570 571 572 ... 701 702

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Delta DVP-ES2 User Manual Page 567

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