FXMP25 User Guide
41
Issue Number: 3
www.controltechniques.com
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•
Enter new mode in Pr
78
•
Reset
•
Power cycle
The new mode will then take effect.
Recommendations
Half control
Normally use half control, since this generally produces a lower amplitude of current
ripple. This results in lower torque ripple in motor.
Full control
Full control causes the SCR bridge to force the field current more rapidly towards zero
at each half cycle. This increases the amplitude of the current ripple, but gives faster
control of the field current level. Use full control under the following conditions:
•
When very rapid field weakening is required
•
If the natural decay of the field defined by
is slower than the acceleration
required, then full field control is required
.
Indicates that field economy level has been selected.
Select the destination parameter of the digital input (terminal 1).
If Pr
81
= 0 (Eco), the digital input controls parameter Pr
80
. This is inverted so Pr
80
is
'ON' by default.
If Pr
81
= 1 (F.Ctl), the digital input controls the parameter Pr
77
.
Reset the drive for the change to take place.
When Mentor II modes [2.H (2) 2.F (3)] are required, Pr
11
must be set before Pr
78
.
If Pr
11
is changed after Pr
78
= 2.H (2) or 2.F (3), a power cycle is required before the
new values will take effect.
NOTE
L
R
----
⎝ ⎠
⎛ ⎞
Pr
78
can be changed while running between St.H (4) and St.F (5).
NOTE
When controlling FXMP with Mentor MP, Mentor MP firmware must be V01.05.01 or
later (Pr
11.29
= 01.05, Pr
11.34
= 1).
NOTE
80
Economy level selected
Coding
Bit
FI
Txt
VM
DP
ND
US
RW
BU
PS
1
1
1
Range
OFF (0) to On (1)
Update rate
Background read
81
Digital input control
Coding
Bit
FI
TE
VM
DP
ND
US
RW
BU
PS
1
1
1
1
Range
Economy Level (0) or Enable Field Controller (1)
Default
0
Update rate
Background read
Содержание FXMP25
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