Parker AC30 - Page 154

10-4 Trips & Fault Finding
AC30 series Variable Speed Inverter
ID
Trip Name
Possible Reason for Trip
Criteria for Warning
16
BRAKE RESISTOR
External dynamic brake resistor has been overloaded:
 Trying to decelerate a large inertia too quickly or too often
The power calculation for the
external resistor has exceeded
one half of the Brake Overrating
allowance.
17
BRAKE SWITCH
Internal dynamic braking switch has been overloaded:
 Trying to decelerate a large inertia too quickly or too often
The power calculation for the
internal dynamic braking switch
has exceeded one half of the its
overrating allowance.
18
LOCAL CONTROL
Keypad has been disconnected from drive whilst drive is running in Local Control:
 GKP accidentally disconnected from drive
Not applicable.
19
COMMS BREAK
Lost option communications:
 A break in option communications has been detected. Refer to option
communications manual.
Not applicable.
20
LINE CONTACTOR
DC Link failed to reach the undervoltage trip level within the contactor feedback time.
 The Line contactor failed to connect.
 Missing 3-phase line supply
Not applicable.
21
PHASE FAIL
 Indicates a missing input phase, for Frame K drives.
Not applicable.
22
VDC RIPPLE
The DC link ripple voltage is too high:
 Check for a missing input phase
 Repetitive start / stop or forward reverse action.
The dc link ripple has exceeded
75% of the trip level.
23
BASE MODBUS
BREAK
Lost Base Modbus communications:
 A break in the Base Modbus communications has been detected. Refer to
“Appendix A Modbus TCP”.
Not applicable.
24
24V OVERLOAD
24V rail is low
 Output overload due to excess current being drawn from the 24v terminal.
Not applicable.
25
PMAC SPEED
ERROR
Only for PMAC motor : When using the Start feature in Sensorless Vector Control, the
real speed hasn’t reached the speed setpoint after 5 seconds to move from open to
closed loop control or to move from closed to open loop
Not applicable.
26
OVERSPEED
Overspeed:
 >150% base speed when in Sensorless Vector mode
Not applicable.
27
STO ACTIVE
Attempt to run the motor with the Safe Torque Off active
 Check the STO wiring. It may be necessary to power the drive off and on to
completely clear this event.
Not applicable.