Rockwell Automation 1756-DMF30 ControlLogix Drive Module User Manual
Page 227
Publication 1756-UM522B-EN-P - February 2003
1756-DMD30 Specific Information B-147
2156
Fld TimeConstant
Enter the electric time constant (Tf) of the field, in mS. This is
the ratio of field inductance to field resistance. If this value is
not specified by the motor manufacturer, use the following
formula: parameter 2156 [Fld TimeConstant] = 1,000 x L /R;
where L is the field inductance in henries, and R is the field
resistance in ohms. The ID test will provide a value that takes
into account the entire circuit (motor and motor leads), which
may be different from a value from the motor manufacturer or
the calculation.
Units:
Default:
Min:
Max:
Type:
File:
Group:
mSec
0
0
32767
Linkable, Read-Write, 16-bit Integer
DPS/PMI
Regulator Config
2157
SCR Diag Gain
Determines how fast error builds up in the Open SCR
diagnostics. Increase the value if warnings need to be
annunciated quickly. A value of 100 (the default) means the
gain is 1 (100/100). A value of 500 (the maximum) means the
gain is 5 time the error (500/100).
Default:
Min:
Max:
Type:
File:
Group:
100
1
500
Linkable, Read-Write, 16-bit Integer
DPS/PMI
Regulator Config
2158
SCR Decay Rate
Determines how much error is retained from calculation to
calculation. Decrease the value when nuisance warnings are
occuring due to large cyclic loads.
Default:
Min:
Max:
Type:
File:
Group:
99
1
99
Linkable, Read-Write, 16-bit Integer
DPS/PMI
Regulator Config
2159
SCR Deadband
Determines the amount of imbalance (in percent) ignored by
Open SCR diagnostics, (e.g., when the value is 20, the
diagnostics will ignore imbalances of less than 20%).
Increasing the value reduces the sensitivity of the diagnostics -
reducing nuisance warnings that may occur due to small
imbalances between the SCRs.
Default:
Min:
Max:
Type:
File:
Group:
10
0
50
Linkable, Read-Write, 16-bit Integer
DPS/PMI
Regulator Config
2160
SCR Trip Point
Determines the threshold of integrated error that cause a
warning to be annunciated. Increasing the value reduces the
sensitivity of the Open SCR diagnostics.
Default:
Min:
Max:
Type:
File:
Group:
1500
1500
3000 Linkable, Read-Write,
16-bit Integer
DPS/PMI
Motor Data
2161
Resolver Gain
The amount of gain used to compensate for varying lengths of
resolver wiring. Set to zero to enable automatic calibration
test on power-up. Values range from 0-255 counts, with 1
count representing .15 volts gain.
Default:
Min:
Max:
Type:
File:
Group:
0
0
255
Linkable, Read-Write, 16-bit Integer
DPS/PMI
Motor Data
2162
Resolver Balance
The amount of capacitance that is added to the sine or cosine
channel of the resolver to compensate for varying lengths of
resolver wiring. Values from 1 to 39 add capacitance to the
cosine channel, while values from 41 to 79 add capacitance to
the sine channel.
Default:
Min:
Max:
Type:
File:
Group:
40
0
79
Linkable, Read-Write, 16-bit Integer
DPS/PMI
Motor Data
No.
Name
Description
Values