90 Rockwell Automation Publication 520-UM001I-EN-E - July 2016
Chapter 3 Programming and Parameters
Options 26 “Current Lmt2”
(2)
When active, A485 [Current Limit 2] determines the drive current limit level.
27 “Anlg Invert” Inverts the scaling of the analog input levels set in
t091
[Anlg In 0-10V Lo] and t092 [Anlg In 0-10V Hi] or
t095 [Anlg In4-20mA Lo] and t096 [Anlg In4-20mA Hi].
28 “EM Brk Rlse” If EM brake function is enabled, this input releases the brake. See t086
[EM Brk Off Delay] for more information.
29 “Acc/Dec Sel3”
(1)
If active, determines which Accel/Decel time is used for all ramp rates except jog.
Used with option 11 “Acc/Dec Sel2” for the Accel/Decel times listed in this table.
30 “Precharge En” Forces drive into precharge state. Typically controlled by auxiliary contact on the disconnect at the DC input to the drive. If this
input is assigned, it must be energized for the pre-charge relay to close and for the drive to run. If it is de-energized, the pre-
charge relay opens and the drive coasts to a stop.
31 “Inertia Dcel” Forces drive into Inertia Ride-Through state. The drive attempts to regulate the DC bus at the current level.
32 “Sync Enable” Must be used in order to hold the existing frequency when Sync Time is set to enable speed synchronization. When this input is
released the drive accelerates to the commanded frequency in A571
[Sync Time].
33 “Traverse Dis” When an input is programmed the traverse function is disabled while this input is active. See A567
[Max Traverse].
34 “Home Limit”
(2)
In Positioning mode, indicates the drive is at the home position. See Appendix E for more information on Positioning.
35 “Find Home”
(2)
In Positioning mode, causes the drive to return to the Home position when a Start command is issued.
Uses A562
[Find Home Freq] and A563 [Find Home Dir] until the “Home Limit” input is activated. If it passes this point, it then
runs in the reverse direction at 1/10th the frequency of [Find Home Freq] until the “Home Limit” is activated again. As long as
this input is active, any start command causes the drive to enter the homing routine. Only functions if in Positioning mode. Once
the Find Home routine has finished, the drive stops. See Appendix E for more information on Positioning.
36 “Hold Step”
(2)
In Positioning mode, overrides other inputs and causes the drive to remain at its current step (running at zero speed once it
reaches its position) until released.
While in “Hold”, the drive ignores any input command which would normally result in a move to a new step. Timers continue to
run. Therefore, when the Hold is removed, the drive must see any required digital inputs transition (even if they already
transitioned during the hold), but it does not reset any timer. See Appendix E for more information on Positioning.
37 “Pos Redefine”
(2)
In Positioning mode, resets the home position to the current position of the machine. See Appendix E for more information on
Positioning.
38 “Force DC” If the drive is not running, causes the drive to apply a DC Holding current (A435
[DC Brake Level], ignoring A434 [DC Brake Time])
while the input is applied.
39 “Damper Input” When active, drive is allowed to run normally.
When inactive, drive is forced into sleep mode and is prevented from accelerating to command speed.
40 “Purge”
(1)
Starts the drive at A433 [Purge Frequency] regardless of the selected control source. Supersedes the keypad Control function as
well as any other control command to take control of the drive. Purge can occur, and is operational, at any time whether the
drive is running or stopped regardless of the selected logic source selection. If a valid stop (other than from comms or SW
enable) is present, the drive will not start on the purge input transition.
41 “Freeze-Fire” When inactive, will cause an immediate F094
“Function Loss” fault. Use to safely bypass the drive with an external switching
device.
42 “SW Enable” Works like an interlock that has to be active for the drive to run.
43 “SherPin1 Dis” Disables shear pin 1 but leaves shear pin 2 active. If A488
[Shear Pin 2 Level] is greater than 0.0 A, shear pin 2 is enabled.
44 Reserved
45 Reserved
46 Reserved
47 Reserved
ATTENTION: If a hazard of injury due to movement of equipment or material exists, an auxiliary
mechanical braking device must be used.
Option Description
29 11
0 0 Acc/Dec 1
0 1 Acc/Dec 2
1 0 Acc/Dec 3
1 1 Acc/Dec 4
ATTENTION: If a hazard of injury due to movement of equipment or material exists, an auxiliary
mechanical braking device must be used.
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