Warnings And Alarms - Danfoss VLT Safety Option MCB 150 Installation Manual

Installation Guide | VLT® Safety Option MCB 150/151

8.2 Warnings and Alarms

The errors are listed numerically.
Table 25: Overview of Errors 1–68
Error Descrip- LED indicators
num- tion
ber
Internal Reason
failure
1 Diagnostic
in pro-
gress
67 Int Fail tol- •
erance er-
ror excee-
ded: Reac-
tion STO
•
•
•
•
68 Int fail •
Speed lim-
it SS1a
Ramp: Re-
action STO
•
•
82 | Danfoss A/S © 2018.09
Check that data for feed-
back (PPR., type of feed-
back, and gear ratio) are
entered correctly.
Direction of feedback is
wrong.
Due to use of feedback fil-
ter the dynamic of the sys-
tem does not match with
dynamic of feedback filter
(parameter 42-15 Feedback
Filter). System is ramping
too fast.
Feedback signals are not
received at all.
No proper shielding of
feedback cables.
The value of Delta V is too
small. For closed loop sys-
tem, it must often be larg-
er than the recommended
value.
Due to use of feedback fil-
ter the dynamic of the sys-
tem does not match with
dynamic of feedback filter
(parameter 42-15 Feedback
Filter).
Load change takes place
during ramping.
N O T I C E
Action
• Make a recustomization
with correct data if nee-
ded.
• Set parameter 42-12 En-
coder Direction to the op-
posite value.
• Decrease the ramping
time on the drive.
• Try to run the system at,
for example, 60 RPM. If
error 99, Int Fail Feedback
error
• Improve shielding of
feedback cables and mo-
tor cables.
• If running in closed loop,
try to adjust PID setting
and if needed increase
SS1 ramping time.
• Try to increase parameter
42-15 Feedback Filter, but
this might cause error 67,
Int Fail tolerance error ex-
ceeded: Reaction STO to
occur.
• Otherwise increase pa-
rameter 42-45 Delta V.
Warnings and Alarms
LED1 LED2
Status of LED 1 and LED2 de-
pends on safety function
state assigned to DI1 and DI2.
AQ279747441421en-000101 / 130R0292
LED4
Green
con-
stant
Green
con-
stant
Red
con-
stant
Red
con-
stant