Omron CJ - REFERENCE MANUAL 02-2010 Reference Manual page 794

3. Instructions
Opera-
Purpose Application
tion
Stopping To stop Decelerating to a
pulse pulse output stop
output, smoothly.
continued (Number of
pulses
setting is not
preserved.)
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.
Specified number
of pulses
Pulse frequency
(Specified with
PULS(886).)
Target
frequency
Execution of
ACC(888)
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 CW/CCW 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 target
frequency of 1,000 Hz is reached.
0.00
0.01
Pulse frequency
Target frequency
1000 Hz
500 Hz
20 Hz/4 ms
ACC(888) executed. ACC(888) executed.
758
Frequency changes
Pulse frequency
Present
frequency
Target
frequency = 0
Execution of
PLS2(887)
Time
@ACC
#0000
Pulse output: 0
#0000
Pulse output method: CW/CCW
D100 Direction: CW in continuous mode
@ACC
#0000 Pulse output: 0
#0000
Pulse output method: CW/CCW
D105 Direction: CW in continuous mode
10 Hz/4 ms
Deceleration rate
Time
Execution of
ACC(888)
D100 0014
D101 01F4
0000
D102
D105 000A
03E8
D106
0000
D107
Time
CS/CJ/NSJ Series Instructions Reference Manual (W474)
Procedure/
Description
instruction
Decelerates the pulse PULS(886)
output to a stop.
ACC(888) or
Note If ACC(888)
SPED(885)
started the
(Independent)
operation, the
original
ACC(888)
acceleration/decel
(Independent,
eration rate will
independent,
remain in effect.
target
If SPED(885)
frequency of 0)
started the
operation, the
PLS2(887)
acceleration/
deceleration rate
ACC(888)
will be invalid and
(Independent,
the pulse output
target
will stop
frequency of 0)
immediately.
Acceleration/deceleration rate: 20 Hz
Target frequency: 500 Hz
Acceleration/deceleration rate: 10 Hz
Target frequency: 1,000 Hz