Rockwell Automation 1395 DC Drive, 800-1250 Hp, FRN 5.XX-9.30 - Manual (Page 130)

Chapter 5
Programming Parameters
5-39
Parameter 626 – Jog Ramp Enable [Jog Ramp Enable]
Internal units : None
Programming Terminal units: 0/1 selection
Minimum Value: 0
Maximum Value: 1
Default Value: 0
Description: Parameter 626 selects the use of velocity reference
ramp while jogging. Choices are:
0 = No ramp when jogging
1 = Use ramp when jogging
Parameter 627 – Flux Mode Select [Flux Mode Select]
Internal units : None
Programming Terminal units: Bit adjustable field
Minimum Value: All Bits Off
Maximum Value: All Bits On
Default Value: Bit 0 On, all others off.
Description: This word is used to enable options for field weakening
and field economy.
Bit 0 – Field Economy Enable. When Field Economy is selected, the
field economy reference (param 674) specifies the field command
(param 115) when the motor has been stopped for the time specified
in the field economy delay (param 675).
Bit 1 – Field Weakening Enable. When field weaken enable is
selected, the field flux command will be supplied by the field
weakening control software. This also enables the CEMF regulator
output as a trim for the field flux command.
Bit 2 – External Feed Forward Enable. When the External Flux Feed
Forward option is selected, the flux feed forward value (parm 159) is
used as the basis for determining the field flux command (param
115). The field weaken enable bit must also be on for this option to
be effective.
Bit 3 – Counter EMF Control Enable. When external CEMF
Reference is selected, the external CEMF reference value (parm 160)
divided by the absolute value of velocity feedback (parm 106) will be
used as the basis for determining the field flux command (parm 115).
The CEMF regulator with the gains nonzero (parms 672, 673), can
offset the feed forward term. To disable CEMF regulation when
using the external feed forward, set the KI, KP gain to zero. The
Field weaken enable bit must also be on for this option to be
effective.
Bit 4 – CEMF Hold: When set, this bit holds the integral term and
output of the CEMF regulator to the last value before the bit was set.
When clear, the CEMF regulator is not affected.