04/10 MN04020001Z-EN
Parameter menu (PAR)
95
Protective functions (P8)
In parameter conceal P8, you can set the reaction of the frequency
inverter to external influences and increase the protection to the
drive system (PDS):
• 0 = deactivated, no reaction
• 1 = Warning (e.g. Warning message AL 50)
• 2 = Error (stop mode after error message based
on parameters P6.8, e.g. F…50)
The error - (FAULT) and warning messages (ALARM) are described
in chapter 5.
PNU ID Access right
RUN
Value Description Factory setting
(P1.3)
P8.1 700 - Set points error (live-zero) 1
Monitors the live zero of the analog inputs AI1 and AI2 if the
parameters P2.1 and P2.5 are set to 1 (4 mA, 2 V):
• AI1, control signal terminal 2, P2.1
• AI2, control signal terminal 4, P2.5.
A warning or error message (F… 50) is output if the signal drops
below 3.0 mA or 1.5 V for 5 seconds or 0.5 mA or 0.25 V for 0.5
seconds. This reaction time can be changed at P8.10.
0 Deactivated
1 Warning (AL 50)
Note: If the setpoint is restored (f 4mA, f 2 V) the drive starts
up automatically if there is no disconnection by the warning
message.
2 Error (F… 50 ), stop function according to P6.8.
P8.2 727 - Undervoltage error 2
Under-voltage error in the intermediate circuit because of a low
mains-side supply voltage, e.g. by connecting 230 V to a 400 V
device or if a phase drops out .
0 Deactivated
1 Warning (AL 09)
Note: A start signal (START button, rising edge on the control
terminals) must exist again for restarting.
2 Error (F… 09), stop function according to P6.8
P8.3 703 - Earth-fault monitoring 2
The earth-fault monitoring checks the currents in the motor phases
and is continually active. It protects the frequency inverter from
ground faults with high currents.
0 Deactivated
If the monitoring is deactivated, the reaction time is shortened to
a start signal.
Caution: When the monitoring is deactivated, a ground fault can
cause damage to the inverter.
1 Warning (AL 03)
2 Error (F… 03), stop function according to P6.8
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