Danfoss VLT Safety Option MCB 150 User Manual

Table 26: Overview of Errors 69–72
Error
num-
ber
Description LED indicators
LED1 LED2 LED4
Internal fail-
ure
Reason Action Green
con-
stant
69 Int fail Speed
limit SS1b
Ramp: Reac-
tion STO
See 68 See 68 Status of LED 1 and LED2 depends
on safety function state assigned to
DI1 and DI2.
Red
con-
stant
70 Int fail speed
limit SLSa:
Reaction STO
Happens during
ramping to SLS limit,
see 68.
Happens during
speed below SLS limit:
• If speed is above
cut-off speed at
activation point
and parameter
42-53 Start Ramp is
set to No, this er-
ror occurs.
• Noise on the feed-
back signal (incl.
quantization
noise) is larger
than expected.
• Load change takes
place, do as in
above point).
• Change parameter 42-53
Start Ramp to Yes and
set parameter 42-54
Ramp Down Time ac-
cordingly.
• Increase parameter
42-50 Cut Off Speed or
decrease parameter
42-51 Speed Limit to get
a larger tolerance
Red
con-
stant
71 Int fail speed
limit SLSb:
Reaction STO
See 70 See 70 Red
con-
stant
72 Internal fail-
ure MCB
150/151
• First, power cycle the
drive or restart the safe-
ty option via parameter
42-90 Restart Safe Op-
tion. Second, try to
make a general reset of
the safety option with
the Administration but-
ton (safety option goes
back to blank initial
state).
• If the problem persists,
contact Danfoss.
Red
con-
stant
Warnings and Alarms
Installation Guide | VLT® Safety Option MCB 150/151
AQ279747441421en-000101 / 130R0292 | 83
Danfoss A/S © 2018.09

Danfoss VLT Safety Option MCB 150 Specifications

General

Brand	Danfoss
Model	VLT Safety Option MCB 150
Category	Control Unit
Language	English