Page 7.13 - 14 COMBIVERT F5-A, -E, -H © KEB, 2012-10
Protective functions
For the malfunction "motor overtemperature", several additional choices exist:
Pn.12: Motor overtemperature response
Value Explanation
6: Warning via
digital output
the motor temperature is monitored, but the drive performs no automatic quick stop
during the pre-warning time, the pre-warning message can only be issued via digital
output. After expiration of the pre-warning period, the inverter goes to error E.doH
7: no error
Motor temperature is not monitored, the error motor overtemperature is never trigge-
red. No message via digital output possible
8: no error if modu-
lation is off
The motor temperature is not monitored while the modulation is switched off. If the
modulation is switched on, monitoring occurs, too. The pre-warning signal, and – after
expiration of the pre-warning period - the error motor overtemperature is generated.
9: dOH-response
Warning via dig. output, as soon as the dOH signal is released (= value 6)
Error is triggered after expiration of the pre-warning period or as soon as the modulati-
on is switched off.
For the malfunction "internal overtemperature", there are 2 response options as well:
Pn.16: Internal overtemperature
Value Explanation
6: Warning via
digital output
The monitoring of the internal temperature is active, but the drive does not execute an
automatic abnormal stop. A pre-warning signal can be issued via a digital output.
7: Error deactiva-
ted
Monitoring of the internal temperature never triggers an error. A pre-warning signal
does not exist.
7.13.2.2 Parametrisation of the abnormal stopping
The abnormal stopping function is different for speed-controlled systems (CS.00 = 4, 5, 6) and for systems with
v/f-characteristic control.
Quick stop at closed-loop systems
For abnormal stopping with closed-loop systems, the drive is decelerated with the adjusted ramp time, and at
the torque limit, respectively.
Pn.60: Quick stop time
Value Explanation
0...300 s Deceleration ramp for abnormal stopping-function
For the abnormal stopping, the "normal" torque limitations of the application often do not apply since the auto-
matic shutdown is always a malfunction response. To permit a quicker deceleration with a greater torque here,
there is a unique torque limit for abnormal stopping.
Pn.61: Quick stop torque limit
Value Explanation
0...32000.00Nm Quick stop torque limit
The torque limitation superimposed by the limiting characteristic and the available current remain in effect.
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