Setting
up Compax3
C3I20T11 / C3I32T11
118
192-120103 N13 C3I20T11 / C3I32T11 December 2010
MN-M 21,22: MN Initiator = 1 on the negative side
The MN initiator can be positioned at any location within the travel range. The
travel range is then divided into 2 contiguous ranges: one range with deactivated
MN initiator (positive part of the travel range) and one range with activated MN
initiator (negative part of the travel range).
When the MN initiator is inactive (signal = 0) the search for the machine reference
is in the negative travel direction.
MN-M 21:
The negative edge of the MN proximity switch is taken directly as MN
(the motor zero point remains without consideration).
MN-M 22:
The positive edge of the MN proximity switch is used directly as MN (the
motor zero point remains without consideration).
22
22
21
21
1
1: logic state
With direction reversal switches
Machine zero modes with a home switch which is activated in the middle of the
travel range and can be deactivated to both sides.
The
assignment of the direction reversal switches
(see on page 132) can be
changed.
Function Reversal via Stromschwelle
If no direction reversal switches are available, the reversal of direction can also be
performed during the machine zero run via the function “direction reversal via
Stromschwelle”.
The drive drives against the mechanical end stop.
When the adjustable Stromschwelle is reached, the drive is decelerated and
changes the direction of movement.
Caution!
Wrong settings can cause hazard for man and machine.
It is therefore essential to respect the following:
Choose a low machine zero speed.
Set the machine zero acceleration to a high value, so that the drive changes
direction quickly, the value must, however, not be so high that the limit threshold
is already reached by accelerating or decelerating (without mechanical limitation).
The mechanical limitation as well as the load drain must be set so that they can
absorb the resulting kinetic energy.
With a bad feedback signal or high controller gain (fast controller or high inertia or
mass) the machine zero might not be detected.
In this case it is necessary to use the control signal filter (O2100.20) or the
velocity filter (O2100.10).
Without motor zero
point, without
direction reversal
switches
