Settings
10.8 Retrigger reference point
FM 352 electronic cam controller
Operating Instructions, 05/2011, A5E01071724-03
121
Data used in the channel DB
Address Name Type Start value Comment
34.3 REFTR_ON BOOL FALSE 1 = retrigger reference point
25.0 SYNC BOOL FALSE 1 = axis is synchronized
Data used in the parameter DB
Address Name Type Start value Comment
44.0 REFPT DINT L#0 Reference point coordinate
52.0 RETR_TYPE DINT L#0 Type of reference point retriggering
Effects of the setting
● FM 352 evaluates the zero mark signal and reference point switch based on the direction
of movement of the axis.
– It evaluates the positive edges when the axis moves in positive direction.
– It evaluates the negative edges when the axis moves in negative direction.
● It sets the actual position to the value of the reference point coordinate.
● The working range is physically shifted on the axis.
● The various points retain their original values, but are now at new physical positions.
● Cam status changes that would normally trigger a hardware interrupt can be lost.
● The SYNC bit is set in the checkback signals.
Note
For information on switching characteristics of time-based cams, refer to chapter
"Influence of settings on the switching characteristics of time-based cam
s (Page 103)".
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