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TR-Electronic GmbH 2007, All Rights Reserved
05/16/2007
TR - EMO - BA - DGB - 0013 - 00
Page 215 of 260
4.2.4.5.5 Object 0x2F04: Calibration values
Object code
RECORD
Description
Range calibration for current and voltage measurement
Subindex 0: Number of entries
Data
type
UNSIGNED8
Attribute
ro
Default
11
Min
-
Max
-
PDO
mapping
-
Description
Number of following entries
Subindex 1: Stator current [mA]
Data
type
UNSIGNED32
Attribute
rw
Default
24229
Min
0
Max
2
32
-1
PDO
mapping
Yes
Description
The entry defines the range limit in mA, which is used for
digital/analog conversion of the current value.
Subindex 2: Minimum bus voltage [mV]
Data
type
UNSIGNED32
Attribute
rw
Default
12000
Min
0
Max
2
32
-1
PDO
mapping
Yes
Description
The bus voltage is the supply voltage for the power output
stages. The total forward or open control loop gain of the
current or torque regulation is proportional to this voltage. In
order to obtain a constant reaction time for the closed control
loop, the gain of the PI controller increases as the bus
voltage reduces.
When the bus voltage falls below the minimum value, the
controller gain reaches its maximum. The total gain therefore
reduces, and the reaction time of the closed control loop
increases.
The minimum bus voltage may fall below 10% of the nominal
value, caused by the limit value measurement and the
calculation accuracy. 25% is recommended.
If this value has been changed, or before a new drive is
commissioned, the bus voltage sensor must be checked and
is reset with the help of the auto-calibration function.