Program features 83
Programmable protection functions
Start interlock (parameter
)
The parameter selects how the drive reacts to loss of start interlock signal (DIIL).
External fault (parameter
A source for an external fault signal is selected by this parameter. When the signal is
lost, a fault is generated.
Local control loss detection (parameter
The parameter selects how the drive reacts to a control panel or PC tool
communication break.
Motor phase loss detection (parameter
The parameter selects how the drive reacts whenever a motor phase loss is detected.
Earth fault detection (parameter
)
The earth fault detection function is based on sum current measurement. Note that
• an earth fault in the supply cable does not activate the protection
• in a grounded supply, the protection activates in 200 milliseconds
• in an ungrounded supply, the supply capacitance should be 1 microfarad or more
• the capacitive currents caused by shielded motor cables up to 300 metres will not
activate the protection
• the protection is deactivated when the drive is stopped.
Supply phase loss detection (parameter
)
The parameter selects how the drive reacts whenever a supply phase loss is
detected.
Safe torque off detection (parameter
)
The drive monitors the status of the Safe torque off input. For more information on the
Safe torque off function, see the
Hardware Manual
of the drive, and
Application guide
- Safe torque off function for ACSM1, ACS850 and ACQ810 drives
(3AFE68929814
[English]).
Switched supply and motor cabling (parameter
The drive can detect if the supply and motor cables have accidentally been switched
(for example, if the supply is connected to the motor connection of the drive). The
parameter selects if a fault is generated or not.
Summary of Contents for ACS850 series
Page 1: ...ACS850 Firmware Manual ACS850 Standard Control Program ...
Page 4: ......
Page 56: ...56 Control locations and operating modes ...
Page 262: ...262 Parameters ...
Page 310: ...310 Fault tracing ...
Page 348: ...348 Control through a fieldbus adapter ...
Page 358: ...358 Drive to drive link ...