Settings
10.5 Change cam edges
FM 352 electronic cam controller
Operating Instructions, 05/2011, A5E01071724-03
113
Effects of the setting
The FM 352 first shifts the on-triggering edge, and then the off-triggering edge of the cam.
This sequence does not depend on the direction in which the cam is shifted.
Exception:
The sequence described above may briefly generate an inverse cam if the new cam start is
greater than the old cam end.
PP
PP
PP
PP
1( PP
1(
1$
1$
1$
1(
%HIRUHWKH
FDOO
$IWHUWKH
FDOO
'XULQJWKH
FDOO
ROG
QHZ
Figure 10-1 Step-by-step change of the cam edges
Note
If a hardware interrupt has been enabled for this cam, the FM 352 can trigger one or two
hardware interrupts, depending on your parameter settings, when it detects the inverse cam.
Changing the on and/or off edge can result in a cam edge or the entire cam being skipped.
For information on switching characteristics of time-based cams, refer to chapter "Influence
of s
ettings on the sw
itching characteristics of time-based cams (Page 103)".
Cam status chang
es that would normally trigger a hardware interrupt can be lost.
Reading modified values
You can read modified values by calling one of the jobs CAM1RD_EN to CAM8RD_EN.
Canceling the setting
The modified values are lost when you restart the module.
To Next Page
Loading...
