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System Manual – MOVIDRIVE® compact Drive Inverters
3
Explanation of the parameters
Parameters
P34x Motor protection
P340 / P342 Motor
protection 1 / 2
Setting range: OFF / ON ASYNCHRONOUS / ON SERVO
Depending on the motor connected (synchronous or asynchronous motor) this function
can have the following effects.
OFF: Function not active
ON ASYNCHRONOUS:
When this function is activated, MOVIDRIVE
®
takes over the thermal protection of the
connected motor by electronic means. In most cases, the motor protection function is
comparable to standard thermal protection (motor protection switch) and, furthermore,
it takes account of speed-dependent cooling by the integrated fan. Motor utilization is
determined using the inverter output current, cooling type, motor speed and time. The
thermal motor model is based on the motor data entered during startup (MOVITOOLS
®
/ DBG11B) and when the operating conditions specified for the motor are observed.
The following signal and display functions are available in conjunction with motor
protection:
Set the following parameters:
Important: Switching off the inverter (mains and 24 V external) always resets the motor
utilization to zero; i.e. any motor heating existing when the motor is switched back on is
not taken into account.
The motor protection function processes the utilization of the connected motors sepa-
rately for both parameter sets. The motor protection function may not be used if only
one motor is permanently connected to the inverter and the "Parameter set changeover"
function is only used for control purposes. Equally, the motor protection function must
not be used with group drives because it is not possible to protect each individual motor
reliably.
ON SERVO:
MOVIDRIVE
®
calculates and displays the motor utilization based on the current. The
goal is to determine if the drive is going to fail based on an overload with the error TF
sensor (F31) after only a few cycles or during startup. This setting is available for para
meter set 1 only.
1
2
NOTE
If the motor also has to be protected against failure of the ventilation, blockage of air
ducts, etc., it is also necessary to employ protection in the form of a TF positive tem-
perature coefficient thermistor or TH bimetallic switch.
Parameters
Signal and display function
P006 Motor utilization 1 / P007
Motor utilization 2
Display of the motor utilization for parameter set 1 / 2.
Error response of inverter when reaching P006 Motor utilization 1 /
P007 Motor utilization 2 of 110 %.
Default setting: EMERG.STOP/FAULT
Parameters
Setting / Description
Self-ventilation or forced cooling
Binary output can be programmed
to:
/Motor utilization 1
/Motor utilization 2
Prewarning in case Motor utilization 1 (P006) / Motor utilization 2
(P007) exceeds a value of 100 %. In this case, the programmed
output is set to "0" = 0 V.
P6..
P60.
P600
Summary of Contents for MOVIDRIVE compact MCH41A
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