Parameters
Protective Functions (P8)
In parameter group 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 = Alarm (for example, AL 50)
●
2 = Fault (stop mode after error message based on parameters P6.8, for example, F...50)
●
The (FAULT) and (ALARM) messages are described on Page 56.
Protective Functions
Access
PNU
ID
RUN
P8.1
700
X
P8.2
727
X
P8.3
703
X
90
M-Max Series Adjustable Frequency Drive MN04020003E—October 2013 www.eaton.com
Value/Range
Description
—
Analog minimum reference error (live-zero)
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, 2V):
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 1.5V for 5 seconds or 0.5 mA or 0.25V for
0.5 seconds. This reaction time can be changed at P8.10
0
Deactivated
1
Alarm (AL 50)
Note: If the setpoint is restored ( 4 mA, 2V) the drive starts
up automatically if there is no disconnection by the warning
message
2
Fault (F... 50), stop function according to P6.8
—
Undervoltage error
Under-voltage error in the intermediate circuit because of a low
input-side supply voltage, for example, by connecting 230V to a
400V device or if a phase drops out
0
Deactivated
1
Alarm (AL 09)
Note: A start signal (START button, rising edge on the control
terminals) must exist again for restarting
2
Fault (F... 09), stop function according to P6.8
—
Ground fault
The ground 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
Alarm (AL 03)
2
Fault (F... 03), stop function according to P6.8
Factory Setting
(P1.3)
1
2
2