
Parameter
Name / value range / [default setting]
Info
0x2000:012
(PAR 190/012)
Power unit - bootloader version
(PU bootlder ver.)
•
Read only
0x2000:013
(PAR 190/013)
Power unit - bootloader type
(PU bootlder type)
•
Read only
0x2001
(PAR 191)
Device name
(Device name)
["My Device"]
Any device name (e.g. "Wheel drive") can be set in this object for the
purpose of device identification.
5.3.8
Device overload monitoring (i*t)
The inverter calculates the i*t utilisation in order to protect itself against thermal overload. In
simple terms: a higher current or an overcurrent that continues for a longer time causes a
higher i*t utilisation.
DANGER!
Uncontrolled motor movements by pulse inhibit.
When the device overload monitoring function is activated, pulse inhibit is set and the motor
becomes torqueless. A load that is connected to motors without a holding brake may there-
fore cause uncontrolled movements! Without a load, the motor will coast.
▶
Only operate the inverter under permissible load conditions.
Details
The device overload monitoring function primarily offers protection to the power section.
Indirectly, also other components such as filter chokes, circuit-board conductors, and termi-
nals are protected against overheating. Short-time overload currents followed by recovery
periods (times of smaller current utilisation) are permissible. The monitoring function during
operation checks whether these conditions are met, taking into consideration that higher
switching frequencies and lower stator frequencies as well as higher DC voltages cause a
greater device utilisation.
•
If the device utilisation exceeds the warning threshold set in
0x2D40:002
(Lenze setting:
95 %), the inverter outputs a warning. The user can utilise this status as a trigger to activate
specific functions.
•
If the device utilisation exceeds the fixed error threshold 100 %, the inverter changes to the
"Trouble" device state. Further operation of the inverter is prevented by controller inhibit.
Controlled standstill can only be executed by the use of a mechanical brake.
Device overload monitoring enables operation of the inverter under the following load condi-
tions:
•
Continuous current load with up to 100 % rated current.
•
3-minute cycle: 150 % rated current for 60 s, recovery phase 120 s with 75 % rated current.
•
15-second cycle: 200 % rated current for 3 s, recovery phase 12 s with 75 % rated current.
Parameter
Name / value range / [default setting]
Info
0x2D40:002
Device utilisation (i*t): Warning threshold
0 ... [95] ... 101 %
If the device utilisation exceeds the threshold set, the inverter outputs a
warning.
•
With the setting 0 % or 101 %, the warning is deactivated.
0x2D40:004
(PAR 135/004)
Device utilisation (i*t): Actual utilisation
(Device utilisation: Ixt utilisation)
•
Read only: x %
Display of the current device utilisation.
0x2D40:005
(PAR 135/005)
Device utilisation (i*t): Error response
(Device utilisation: Error response)
Selection of the response to be executed when the device overload
monitoring function is triggered.
2 Trouble
3 Error
0x2DDF:001
Axis information: Rated current
•
Read only: x.xx A
•
Default setting depending on the size.
Diagnostics and fault elimination
Diagnostics
Device overload monitoring (i*t)
61
Phone: 800.894.0412 - Fax: 888.723.4773 - Web: www.actechdrives.com - Email: [email protected]