CHAPTER 5.0 Functional Overview
5-28
CDS7324 (FORMERLY LSF-0819)
Rev. A
INSTALLATION & USER’S MANUAL
5.10.1.1.2
Positive Limit Switch
This handler function is used to configure the input as a positive limit switch. The default operation is that when
the input is set the limit switch is inactive. If the input is cleared, and the drive is not performing a homing cycle,
the drive will stop. For torque mode operation, torque reference is reduced to zero. For velocity mode operation,
the motor is decelerated to zero. For position mode further moves in that direction are prevented. Motion in the
opposite direction is possible provided the other limit switch is not also activated. Further movement in the
positive direction is prevented, by disabling any torque from being applied in this direction. If the input is cleared,
and the drive is performing a homing cycle, the drive will quickstop, but subsequent moves may occur as part of
the homing cycle.
If not in homing mode, the drive can be set up to disable or remain enabled on detection of a limit switch by
setting bit 1 of
quickstop_mode
(1013). If set to 0 then the drive will disable, if set to 1 then the drive will remain
enabled.
If the drive is configured to disable on a quick stop by setting bit 1 to 0, the brake is applied (if configured to do so)
when the velocity decreases below a programmable level set by
standby_velocity
(1138). The drive will then
disable a programmable time after the brake is applied set by
brake_lock_to_disable_timeout
(1004).
If the velocity does not decrease below
standby_velocity
within a programmable time set by
velocity_rampdown_time_limit
(1143), then the drive will disable and the brake will be applied (if configured to do
so).
The operation of the brake under a quick stop with disable can be configured to either apply or remain released
using the
brake_control
parameter as described in the Brake Release Switch section.
5.10.1.1.3 Negative Limit Switch
This handler function is used to configure the input as a negative limit switch. The default operation is that when
the input is set the limit switch is inactive. If the input is cleared, and the drive is not performing a homing cycle,
the drive will stop. For torque mode operation, torque reference is reduced to zero. For velocity mode operation,
the motor is decelerated to zero. For position mode further moves in that direction are prevented. Motion in the
opposite direction is possible provided the other limit switch is not also activated. Further movement in the
negative direction is prevented, by disabling any torque from being applied in this direction. If the input is cleared,
and the drive is performing a homing cycle, the drive will quickstop, but subsequent moves may occur as part of
the homing cycle.
If not in homing mode, the drive can be set up to disable or remain enabled on detection of a limit switch by
setting bit 1 of
quickstop_mode
(1013). If set to 0 then the drive will disable, if set to 1 then the drive will remain
enabled.
If the drive is configured to disable on a quick stop by setting bit 1 to 0, the brake is applied (if configured to do so)
when the velocity decreases below a programmable level set by
standby_velocity
(1138). The drive will then
disable a programmable time after the brake is applied set by
brake_lock_to_disable_timeout
(1004).
If the velocity does not decrease below
standby_velocity
within a programmable time set by
velocity_rampdown_time_limit
(1143), then the drive will disable and the brake will be applied (if configured to do
so).
The operation of the brake under a quick stop with disable can be configured to either apply or remain released
using the
brake_control
parameter as described in the Brake Release Switch section.
Содержание DS2110
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