
4.SERVO FUNCTION DETAILS B-65270EN/05
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Conventionally, however, it was impossible to use "PSM cut-off based
on the VRDY OFF alarm invalidation signal" along with the "servo
alarm 2-axis simultaneous monitor function." This is because the
"servo alarm 2-axis simultaneous monitor function" holds an alarm
condition in the servo software and will not activate a motor even after
the ESP line is connected.
To evade this problem, a function has been added which clears
information about an alarm condition from the servo software 2
seconds after the alarm condition is detected. This way, it is possible
to use the "servo alarm 2-axis simultaneous monitor function" along
with "PSM cut-off based on the VRDY OFF alarm invalidation
signal."
NOTE
It is necessary to release the VRDY OFF alarm
invalidation signal 2 seconds after the PSM ESP
signal is turned off.
4.18.5 Motor Feedback Sharing Function
To achieve improved thrust, two linear motors may be connected in
series.
When linear motors are connected in series, one position feedback
signal, which is originally available for the main axis, is to be shared
by the sub-axis as well. In this case, the motor feedback sharing
function can be used.
This function can also be used when a motor (α
iS300/2000,
α
iS500/2000, αiS1000/2000HV) with the wire tandem specification
is used.
NOTE
When using this function in a full-closed loop
system, the main axis shares its separate detector
feedback loop with the sub-axis.
ESP
larm
detected
VRDY OFF alarm
invalidation
2 seconds
To be tuned off 2 seconds after the ESP is turned off