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2-335

2 Instructions

CP1E CPU Unit Instructions Reference Manual(W483)

High-speed Counter/Pulse

Output Instructions

ACC

Note Triangular Control

If the specified number of pulses is less than the number required to reach the target frequency and return to zero, the

function will automatically reduce the acceleration/deceleration time and perform triangular control (acceleration and

deceleration only.) An error will not occur.

Sample program

When CIO 0.00 turns ON in the following programming example, ACC(888) starts pulse output from

pulse output 0 in continuous mode in the clockwise direction using the pulse + direction method. Pulse

output is accelerated at a rate of 20 Hz every 4 ms until the target frequency of 500 Hz is reached.

When CIO 0.01 turns ON, ACC(888) changes to an acceleration rate of 10 Hz every 4 ms until the tar-

get frequency of 1,000 Hz is reached.

Stopping

pulse out-

put, con-

tinued

To stop

pulse out-

put

smoothly.

(Number of

pulses set-

ting is not

preserved.)

Decelerating to a

stop

Decelerates the pulse

output to a stop.

Note If ACC(888) started

the operation, the

original accelera-

tion/deceleration

rate will remain in

effect.

If SPED(885)

started the opera-

tion, the accelera-

tion / deceleration

rate will be invalid

and the pulse out-

put will stop imme-

diately.

PULS(886)

↓

ACC(888) or

SPED(885)

(Independent)

↓

ACC(888)

(Independent,

independent,

target fre-

quency of 0)

PLS2(887)

↓

ACC(888)

(Independent,

target fre-

quency of 0)

Opera-

tion

Purpose Application Frequency changes Description

Procedure/

instruction

Pulse frequency

Present

frequency

Target

frequency = 0

Execution of

ACC(888)

Deceleration rate

Time

Execution of

PLS2(887)

Pulse frequency

Target

frequency

Specified number

of pulses

(Specified with

PULS(886).)

Execution of

ACC(888)

Time

0014

01F4

0000

D100

D101

D102

000A

03E8

0000

D105

D106

D107

@ACC

#0000

#0100

D100

0.00

@ACC

#0000

#0100

D105

0.01

500 Hz

10 Hz

4 ms

20 Hz/4 ms

1000 Hz

Direction: CW in continuous mode

Pulse output: 0

Pulse output method:

Pulse + direction output

Direction: CW in continuous mode

Pulse output: 0

Pulse output method:

Pulse + direction output

Target frequency: 500 Hz

Acceleration/deceleration rate: 20 Hz

Target frequency: 1,000 Hz

Acceleration/deceleration rate: 10 Hz

Time

Target frequency

Pulse frequency

ACC(888) executed.

1 2 ... 366 367 368 369 370 371 372 373 374 375 376 ... 466 467

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