Axis 7100 Service Manual Page 45

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IV.5.2 Important notes
Connect up the unit according to the wiring diagram in Chapter IV.5.5.
The unit is supplied from the auxiliary voltage (terminals +25V, XGND) which is also available in
the servo amplifier. Internally, this is electrically connected to the analog ground (AGND). There
is an internal fuse for the positive pole. Both poles are decoupled via HF chokes.
If you want to use the pulse encoder signals in the control system, then the driver circuitry on
the option board must be provided with a 5V supply (see Chapter IV.5.5).
The analog speed controller is normalized for 1024 pulses / turn. You can use the soldered link
LB1 to set the speed controller to a final limit speed of 3000 rev/min (LB1 open) or 6000 rev/min
(LB1 closed).
Close all the hardware limit switches in the higher-level control and combine the signals in
an AND function. Join the servo amplifier inputs PSTOP and NSTOP together (see Chapter
IV.5.5). Connect the output of the AND function to the joined inputs PSTOP/NSTOP.
In order to be able to drive away from an activated limit switch, the controller must produce a
speed setpoint value with the correct polarity sign for traversing away from the activated limit
switch and then 24V must be applied to the bridged limit switch.
In the event of an overload of the servo amplifier, the effective current limit within the servo
amplifier (I
t) remains active.
The following table shows the relationship between the applied current limit I
and
the current setpoint I
which is produced:
If the enable input is not controlled, then the result is always I = 0.3 % I .
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Chapter IV Interfaces and options Page IV - 7
digifas™ 7100 series 01.98
Caution !
The drive can run away if the pulse encoder cable from the servo amplifier to the IL mo-
dule is interrupted (e.g. by mechanical damage to the cable).
Take account of this in the controller program.
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