Operating Instructions – Electronic Motor DRC.-..-DAC
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8
Description of power section parameters
Parameters
Response ext.
error
index 9729.16
Factory setting: EMERGENCY STOP / WAITING
The error is only triggered in the ENABLED inverter status. Index 9729.16 is used to
program the error response that is triggered by an input terminal that is programmed to
"/EXT. ERROR".
Line phase failure
response
index 9729.4
Factory setting: DISPLAY ONLY
The supply system input phases are monitored for failure of a single phase. If a phase
failure is detected in two phases, then the DC link will be de-energized, which
corresponds to a supply system disconnection.
Since the supply system input phases cannot be monitored directly, monitoring has to
be done indirectly via the DC link ripple, which increases drastically if one phase fails.
The DC link voltage is monitored at a time interval D
t
= 1 ms for dropping below a
minimum voltage level that depends on the rated supply voltage of the unit.
The result is the following nominal guide value for detecting a phase failure:
• 50 Hz system: approx. t
max
= 3.0 s
• 60 Hz system: approx. t
max
= 2.5 s
The programmed response is activated when a line phase failure is detected.
Temperature
sensor trip
response
index 9729.9
Factory setting: EMERGENCY STOP / WAITING
Index 9729.9 is used to program the error response which is triggered by the tempera-
ture sensor monitoring function of the TF or TH which may be installed in the motor
winding.
Manual reset
index 8617.0
Setting range: YES / NO
YES: The pending error is reset. Index 8617.0 automatically reverts to NO after the
reset. Activating the manual reset does not have any effect if there is no error present.
NO: No reset.
Power section parameters \ unit functions \ scaling of actual speed value
Scaling factor for
user display
numerator
index 8747.0
Setting range: 1 – 65535
Actual speed scaling defines a user-specific display parameter "index 8501.0 user
display". For example, the user display is to be shown in 1/s.
This requires a scaling factor of 1/60. This means the numerator scaling factor has to be
set to 1 and the denominator scaling factor to 60. The scaling unit 1/s is entered in
"index 8772.0/8773.0 user-defined unit".
Scaling factor for
user display
denominator
index 8748.0
Setting range: 1 – 65535
Actual speed scaling defines a user-specific display parameter "index 8501.0 user
display". For example, the user display is to be shown in 1/s.
This requires a scaling factor of 1/60. This means the numerator scaling factor has to be
set to 1 and the denominator scaling factor to 60. The scaling unit 1/s is entered in
"index 8772.0/8773.0 user-defined unit".
User-defined unit
index 8772.0,
8773.0
Factory setting: rpm.
Max. 8 ASCII characters; displayed in "index 8501.0 user display".
00
I
