71
NTT 240/460
Operation mode
Installation and user guide
Rev: 4.0
6.04 Emergency stop functions
!
In order to perform correctly the emergency stop functions, it’s mandatory that +24V for logic supply is
available untill the procedure is completed.
For managing the emergency stop, drive provides some features that can change the operating status. Function are
shown below:
1. FAULT REACTION function
2. HALT function
3. SAFE TORQUE OFF safety function
Drive operating status are shown below:
•
SWITCH-OFF status
: drive does not provide current to motor and Drive OK or Fault condition is shown.
This status is reachable during operation when emergency stop procedure is active.
•
SWITCH-ON status
: drive provides current to motor in standstill only if Drive OK or warning condition is
active. This status is reachable during operation when emergency stop procedure is active.
•
OPERATION ENABLED status
: drive follows speed, torque or position reference, related to desired control
topology only if Drive OK or warning condition is active.
Drive operating conditions are shown below:
•
DRIVE OK or FAULT conditions
: drive provides high active output for DRIVE OK condition when no alarms
occured. If an alarm occurs, drive goes into FAULT condition and output is low.
•
WARNING condition
: some alarms allow the drive to enter the WARNING condition where motor control
is available but only with limit performance or simply showing that an unusual situation is occured.
To further information about alarms that cause warning condition, please see
.
Emergency stop function during Modbus operation mode is shown below:
6.04.1 FAULT REACTION function
With the FAULT REACTION function is possible to set drive management when an alarm occures.
To further information about alarms that allow fault reaction function, please see
“Ch. 8 Drive status and diagnostics”
Settings for this function are shown below:
•
Inertia stop: drive goes immediatly into
SWITCH-OFF
status disabling power to motor.
•
Ramp controlled stop, setting related ramp parameter, then drive goes into
SWITCH-OFF
status disabling
power to motor.
•
Limit torque stop, setting related torque limit parameter then drive goes into
SWITCH-OFF
status
disabling power to motor.
Содержание NTT 240
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