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Pulse Outputs Section 7-6
• Use PRV(881) to read the pulse output PV of the specified port.
Pulse Outputs without Acceleration/Deceleration (PULS(886): Electronic Cam
Control)
This procedure shows how to use the PULS(886) instruction’s electronic cam
control function to generate a single-phase pulse output without acceleration
or deceleration. The number of output pulses can be changed during position-
ing.
Procedure
1,2,3... 1. Determine pulse output port.
• Select pulse output 1 or 2.
2. Wire the output.
• Output: CW and CCW
• Output power supply: 5 V DC
3. Make the necessary System Setup settings (Pulse Output Tab Page
− Op-
eration Mode).
• Set the pulse output operation mode (in the Pulse Output Tab Page
−
Operation Mode) to absolute linear pulse output (electronic cam control)
or absolute circular pulse output (electronic cam control).
• Set the clock speed for pulse outputs 1 and 2.
4. Create the necessary ladder programming.
• Use PULS(886) to set the absolute position, output frequency, and pulse
output (automatic determination of pulse output direction) for the specified
port.
• Use INI(880) to stop pulse output from the specified port.
• Use PRV(881) to read the pulse output PV of the specified port.
Electronic Cam Control
Functions
The electronic cam control supports the following functions.
• The pulse output direction is determined automatically by comparing the
present position (pulse output PV) and target position.
• The PULS(886) instruction can be executed during pulse output to
change the absolute position setting and pulse frequency.
• Applications of Electronic Cam Operation:
PULS
INI
ACC
PRV
A621 A620
A623 A622
A624
A625
CW
CCW
CW
CCW
Pulse output
port 1
Pulse output
port 2
Single-phase
pulse output
(fixed duty ratio)
Start
output
Ladder program Ladder program
Set the number
of output pulses.
Stop pulse output.
Target frequency: 0 Hz to 1 MHz
Start pulse output.
Pulse output
mode
System Setup
Mode settings for
ports 1 and 2
Port 1
Port 2
Port 1
Port 2
Refresh status (once each cycle
just after instruction execution)
Pulse output status
Pulse output PV
Refresh PV (once each cycle) Refresh PV (immediate refresh)
SET PULSE
MODE CONTROL
HIGH-SPEED
COUNTER
PV READ
ACCELERTION
CONTROL
Mode settings (CW/CCW, accel-
eration/deceleration, independ-
ent/continuous)
Acceleration/deceleration rate
(common) (1 or 2 ms cycle,
1 Hz to 9,999 Hz)