Omron H8PS Operation Manual page 87

● Precautions on the
deceleration stage
High speed
Speed
Low speed
Cam program
Output
(after advance angle compensation)
Amount of angle compensation
4.2 Advance Angle Compensation (ADV) Function
As described above, the ADV function executes one "measuring the
speed/calculating the advance angle/making the output effective" cycle
every 200 ms. This enables to advance the output ON/OFF timing
correctly while the speed is accelerating as well as during high-speed
operation. However, the function must be used carefully if the
operation has a deceleration stage since the problem described below
may occur during such an operation stage.
• Conditions
- There is a steep deceleration during one turn of the machine
(Encoder).
- The set duration of each output is short.
• Output operation
Although the program includes a single ON/OFF operation as shown
below, output may turn ON/OFF more than one time as shown
below.
1 turn
Small Small Medium Medium Large Large Large Large Large/
Small
The output is turned ON at the
advanced timing by angle
compensation during high-speed
operation. The calculation is executed
again during a low-speed operation
after the steep deceleration, causing
the output to turn ON again.
Small
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