Omron H8PS Manual page 27

Advance Angle Compensation (ADV)
Function
The advance angle compensation function automatically advances
the ON/OFF angle of cam outputs in proportion to machine
(encoder) speed. As the speed of the machine increases, the system
can be affected by the delay in outputs. If the ADV function is used,
the output delay caused by higher speeds is automatically
compensated.
As shown in the following diagram, ADV function is used to linearly
compensate outputs according to the speed based on the ADV value
setting for a specific speed.
ADV value
2
0
Note: The maximum amount of angle compensation is 360 .
Cam program setting
100
8 advance angle
compensation
At high speed
(400r/min)
92
Example: ADV Value Set to 2 at 100 r/min
ADV value can be set independently for cams 1 to 7 (7 total). For the
ADV function, the speed and the amount of angle compensation are
set. If "- - -" is displayed for any setting, the ADV function is disabled.
The setting ranges are given in the following table.
Encoder
Resolution Display angle
256 256 " - - -
256 360 " - - -
360 --- " - - -
720 --- " - - -
Note: Default settings are shown in reverse type.
The maximum response speed will decrease as shown in the
following table when ADV values are set for 4 cams or more.
Number of cams Encoder resolution
with ADV settings
0 to 3 256/360
720
4 to 7 256/360
720
Note: Even if the ADV value is set to 0°, the cam must be included in
the number of cams with ADV settings.
Amount of angle compensation
100
Speed (r/min)
180
172
Speed ADV value
", 1 to 1,600 " - - - ", 0 to 255
", 1 to 1,600 " - - - ", 0 to 359
", 1 to 1,600 " - - - ", 0 to 359
", 1 to 800 " - - - ", 0 to 359.5
Max. response
speed
1,600r/min
800r/min
1,200r/min
600r/min
Example: Setting the ADV Value to 2 at 100 r/min for Cam 4
1. Set the mode switch to PRGM or TEST.
2. Set cam number 4 with the CAM Keys
3. Press the Key to move to the ADV function setting display
ADV
and confirm that "ADV" is displayed.
Setting Display
TST
CAM STEP
TST
STEP
CAM
TST
STEP
CAM
7. Press the Key after finishing setting the ADV function. The
ADV
previous display in Programming or Test Mode will be resumed.
Note: If the bank function is being used, set the bank number before
setting the cam number.
Cam Positioner
. (See note.)
4. Set the speed to 100 with the
ANGLE Keys and then
press the Key.
WRITE
5. Set the ADV value to 2 with the
ANGLE Keys .
6. Press the Key to write
WRITE
the settings to memory.
H8PS
27