Yaskawa F7 Drive Overvoltage Suppression - Manual (Page 5)

Date: 09/17/2010, Rev: 09-2010 Page 5 of 9 TM.F7SW.062
4.3 Monitors (U1-XX)
Monitor Num
ber
Modbu
s Add
ress
Monitor Name
Digital Operator
Display
Description
Scaling for Multi-
function Analog
Output
(H4-01/H4-04)
Unit
A
cce
ss
Le
vel
*1
U1-90 0720H
Soft Start Frequency
Reference
Soft Start Freq
Displays the
frequency reference
after the soft starter,
but before the OV
Regulator PI
controller output.
100% =
Fmax (E1-04)
0.01
Hz
Q
U1-91 0721H
Overvoltage Frequency
Reference
OV Reg Total Ref
Displays the
frequency reference
after the output of the
OV Regulator PI
controller.
100% =
Fmax (E1-04)
0.01
Hz
Q
U1-92 0722H
Overvoltage
Suppression Regulator
Error Signal
OV Reg Error
Displays the error
(setpoint - feedback)
of the OV Regulator
PI controller.
100% =
Motor Rated
Torque (Iq)
0.1
%
Q
U1-93 0723H
Overvoltage
Suppression Regulator
Output
OV Reg Output
Displays the output of
the OV Regulator PI
controller.
100% =
Fmax (E1-04)
0.1
%
Q
*1: Access Level (A1-01): Q = “Quick Start”, A = “Advanced”, F = “Factory”. V/F and Open Loop Vector only.
4.4 Faults
Fault Display Description Cause Countermeasures
B-BRK Belt Break
The drive’s output
frequency was at the
maximum output
frequency (E1-04) for
more than 30 seconds.
See section 6.3 for details.
Fix belt / coupling.
4.5 Alarms
Alarm Display Description Cause Countermeasures
OTDLY
Overtemp Delay
Over-temperature Delay
The drive’s heat sink
temperature exceeded
parameter L8-02
(Overheat Pre-alarm
Level) and then fell below
the L8-02 level within the
P2-01 time. This alarm will
flash until the P2-01 timer
has expired. See section
6.4 for details.
Decrease the drive heat
sink temperature. Check
the drive’s cooling fans.
Check the sizing of the
drive’s enclosure.