SMT-BD2
Chapter 8 - Appendix
1 - USE OF THE LIMIT SWITCHES & "CVO" INPUTS
During the amplifier operation in speed mode (
CI
input inactive) the enabling of the
CV0
input immediately stops
the motor. The motor is decelerating according to the
Accel/decel time
parameter value. The motor is maintained
at standstill while the
CV0
input is activated. During the amplifier operation in torque mode (
CI
input activated) the
enabling of the
CV0
input sets the current reference at 0. The current reference is maintained at 0 while the
CV0
input is activated.
During the amplifier operation in speed mode (
CI
input inactive) or in torque mode (
CI
input active), the enabling
of the
FC
+
limit switch stops any motor displacement in the positive direction and the enabling of the
FC-
limit
switch stops any motor displacement in the negative direction. The motor is decelerating with the amplifier
Maximum current
value in order to get the shortest possible braking time.
!
Positive and negative directions depend on the encoder wiring and on the motor wiring. So, before
mounting and wiring the limit switches, it is recommended to find the positive and negative directions
of the motor.
2 - USE OF THE "AMP. READY" & "POWER READY" OUTPUTS
When an amplifier fault is released, the
AMP. READY
output is immediatly disabled (contact is open). After
elimination of the error source, the amplifier can be reset via pins 12 and 13 of the X4 connector.
If the position initialization reference must be kept when a stored fault is released on the amplifier and the power
supply turned off, it is necessary to have an auxiliary supply for the logic board which is independent from the
power supply. In this case, the
JK
and
KL
jumpers of the logic board allow to inhibit or to release the "Undervolt."
fault when the amplifier is turned on.
JK
jumper closed and
KL
jumper open configuration :
If the auxiliary supply is turned on before the main power supply, the "Undervolt." fault is displayed and
can hide a fault of lower priority. The
AMP READY
and
POWER READY
outputs are both inactive
(contact is open) until the power supply in on.
JK
jumper open and
KL
jumper closed configuration :
The "Undervolt." fault is inhibited when turning on the auxiliary supply before switching on the main
power supply. The
AMP READY
output is then active and
POWER READY
remains inactive (contact
open) until the main power supply is on.
3 - SPEED FOLLOWING ERROR PROTECTION
During the amplifier operation in speed mode (
ENABLE
input active and
CI
input inactive), when the speed
controller error reaches the
following error threshold
value, the “Tracking” fault is released and the amplifier is
disabled. The
Speed following error threshold
parameter value must be adjusted at its minimum value
according to the operating cycle in order to detect any uncontrolled motor movements that may be dangerous for
operator and machine.
!
Speed following error protection is inactive during the
Auto-phasing
and the
Auto-tuning
procedures. When the amplifier is operating in torque mode (
CI
input active), the speed following
error protection is also inactive.
50
Chapter 8 – Appendix
