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Pulse Outputs Section 7-6
7-6-3 Specifications
Item Specification
Acceleration/ decelera-
tion
None Yes
Trapezoid None None (acceleration or
deceleration)
Yes with separate
acceleration and
deceleration rates
Instructions for inde-
pendent-mode posi-
tioning
PULS(886) +
SPED(885)
PULS(886) (Elec-
tronic Cam Control)
PULS(886) +
ACC(888)
PLS2(887)
Instructions for contin-
uous-mode speed con-
trol
SPED(885) --- ACC(888) ---
Output frequencies Constant specified for
SPED(885): 0 Hz to
1MHz
Word specified for
SPED(885): 0 Hz to
1MHz
0 Hz to 1 MHz 0 Hz to 1 MHz
Although the above ranges can be set for the instructions, the output frequency range is ulti-
mately controlled by the clock frequency. The output frequencies are obtained by dividing the
clock pulse with an integer dividing ratio, meaning the actual output frequency can be different
from the set frequency. (Refer to Precautions when Using Pulse Outputs on page 175 for details.)
The settings in the System Setup (Clock) are as follows:
20 MHz Pulse output frequency range: 400 Hz to 1 MHz
10 MHz Pulse output frequency range: 200 Hz to 200 kHz
5 MHz Pulse output frequency range: 100 Hz to 100 kHz
2.5 MHz Pulse output frequency range: 40 Hz to 50 kHz
1.25 MHz Pulse output frequency range: 20 Hz to 20 kHz
Frequency accelera-
tion/deceleration rate
--- 1 Hz to 9,999 Hz every 2 ms or 1 ms
Duty ratio 50% (fixed)
Pulse output operation
modes
One of the following can be set for each port in the System Setup.
1) Relative pulse output:
No. of output pulses = pulse output value
2) Absolute linear pulse output:
No. of output pulses = |PV of pulse output – target pulse amount|
3) Absolute circular pulse output:
As above. If the circular maximum count is exceeded, the count value returns to 0000 0000
hex. (Circular maximum count is set in System Setup.)
4) Electronic cam control (linear) (output with absolute position specification:)
The direction is automatically determined from the relation between the PV and target position
(PV < Target = CW, PV > Target = CCW. No. of output pulses = |PV of pulse output – target
pulse amount|
5) One-shot pulse output:
Pulse turned ON for specified time between 0.01 and 9,999 ms via STIM(980) instruction
6) Pulse counter timer:
High-precision timer created using the one-shot pulse output function. Pulses are not output
externally.
7) Electronic cam (circular) (output with absolute position specification):
The direction is automatically determined from the relation between the PV and target position
(PV < Target = CW, PV > Target = CCW). No. of output pulses = |PV of pulse output – target
pulse amount)|