
90 Program features
The mode of the emergency stop is selected by parameter
. The following modes are available:
• Off1: Stop along the standard deceleration ramp defined for the particular
reference type in use
• Off2: Stop by coasting
• Off3: Stop by the emergency stop ramp defined by parameter
.
With Off1 or Off3 emergency stop modes, the ramp-down of the motor speed can be
supervised by parameters
Notes:
• The installer of the equipment is responsible for installing the emergency stop
devices and all additional devices needed for the emergency stop function to fulfill
the required emergency stop categories.
• After an emergency stop signal is detected, the emergency stop function cannot
be canceled even though the signal is canceled.
• If the minimum (or maximum) torque limit is set to 0%, the emergency stop
function may not be able to stop the drive.
• During an emergency stop, the speed and torque reference parameters such as
reference ramp shapes (
and
) are not
considered.
Settings and diagnostics
Parameters
(page
(page
(page
) and
Emergency ramp supervision delay
Events: -
Motor thermal protection
The control program features two separate motor temperature monitoring functions.
The temperature data sources and warning/trip limits can be set up independently for
each function.
The motor temperature can be monitored using
• the motor thermal protection model (estimated temperature derived internally
inside the drive), or
• sensors installed in the windings. This will result in a more accurate motor model.
The motor thermal protection model fulfills standard IEC/EN 61800-5-1 ed. 2.1
requirements for thermal memory retention and speed sensitivity. The estimated
temperature is retained over power down. Speed dependency is set by parameters.
ACS180 FW.book Page 90 Tuesday, March 9, 2021 2:25 PM