Altivar 38 - variable speed drive - user's manual

Configurable I/O Application Functions
Motor switching
This function enables two motors with different ratings to be powered by the same drive in succession, with
switching performed by an appropriate sequence at the drive output. Switching must take place with the motor
stopped, and the drive locked. The following internal parameters are switched automatically by the logic
command:
- nominal motor current
- injection current
This function automatically disables thermal protection on the second motor.
Accessible parameter: Ratio of PCC motor ratings in the drive menu.
Fault reset
Two types of reset are available: partial or general (rSt parameter in the "fault" menu).
Partial reset (rSt = RSP):
Used to clear the stored fault and reset the drive if the cause of the fault has disappeared.
Faults affected by partial clearing:
- line overvoltage - communication fault - motor overheating
- DC bus overvoltage - motor overload - serial link fault
- motor phase loss - loss of 4-20 mA - drive overheating
- overhauling - external fault - overspeed
ENGLISH
General reset (rSt = RSG):
This inhibits all faults (forced operation) except SCF (motor short circuit) while the assigned logic input
is closed.
Forced local mode
Used to switch between line control mode (serial link) and local mode (controlled via the terminal strip or via
the terminal).
Auto-tuning
When the assigned logic input changes to 1 an auto-tuning operation is triggered, in the same way as
parameter tUn in the “drive” menu.
Caution: Auto-tuning will only be performed if no command has been activated. If a "freewheel stop"
or "fast stop" function has been assigned to a logic input, this input must be set to 1 (active at 0).
Application: Motor switching for example.
Preset PI auto-man, PI reference: See PI function (page 111)
External fault
When the assigned logic input changes to 1, the motor stops (according to the configuration of the LSF
Stop+flt parameter in the Drive menu), and the drive locks in EPF external fault fault mode.
Force to keypad
Enables a LI to be used to select for local control:
If LIX=FTK and FTK=0: operation by the control terminals
If LIX=FTK and FTK=1: control by the keypad
- If LIX=FTK, the LCC function in the control menu is no longer accessible by the keypad. In
consequence it is impossible to control the drive by the keypad.
- When FTK has been disactivated it is neccesary to revalidate the function LCC again in the
control menu.
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