ABB ACS560, Firmware Manual

Page: 82 / 514

82 Program features
The mode of the emergency stop is selected by parameter 21.04 Emergency stop
mode . 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
23.23 Emergency
stop time .
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. For more information, contact your local
ABB representative.
• 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 ( 23.32 Shape time 1 and 23.33 Shape time 2 ) are not
considered.
Settings
Parameters 21.04 Emergency stop mode (page 211 ), 21.05 Emergency stop source
(page 211 ), and 23.23 Emergency stop time (page 228 ).

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.
Motor thermal protection model
The drive calculates the temperature of the motor on the basis of the following
assumptions:
1. When power is applied to the drive for the first time, the motor is assumed to be at
ambient temperature (defined by parameter 35.50 Motor ambient temperature ).