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Epsilon Eb and E Series EN Drives Reference Manual
Warning
When the Stop input function is deactivated, the previous operating mode is restored
within 400 µs and the drive and motor will respond immediately with no ramping unless
ramping is part of the selected mode.
+/- Travel Limits
The + and - Travel Limit input functions will stop motion in the direction indicated by the
input function using the Travel Limit Deceleration rate. This feature is active in all modes.
When an axis is stopped by a Travel Limit function, it will maintain position until it receives
a command that moves it in the opposite direction of the active Travel Limit.
For example, the + Travel Limit will stop motion only if the motor is moving + but allows -
motion to move off the limit switch. Conversely, the - Travel Limit will stop motion only if
the motor is moving - but allows + motion to move off the limit switch.
If both input functions are active at the same time, no motion in either direction will be
possible until at least one of the inputs is released.
When either + or - Travel Limit input function is activated, a fault will be logged into the Fault
Log, and the drive will display an "L" on the LED diagnostics display on the front of the
drive. Once the axis is driven off the limit switch, the fault will be cleared and the "L" will
disappear.
If both Travel Limit input functions are activated simultaneously, the drive will respond as if
the Stop input function has been activated and will use the Stop Deceleration ramp.
Note
The function of the Travel Limits will be effected by the installation of an Function
Module (FM) to the E Series drive. Please refer to the particular FM's reference manual
for complete description.
Note
See the "Revision History" section for information on Travel Limits input functions prior
to firmware revision A6.
Travel Limit Application Notes
Torque Mode
If you are operating in Torque mode, the drive must be tuned to the load to prevent instability
when activating the Travel Limit input functions.
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