LA Series Linear Servo Amplifier Technical Reference Manual
19
8 User Interfaces
8.1 Push Button
The push button is used for both the Reset and Autobalance functions. The DSP measures the amount
of time the button is active (pressed). If the button is active for less than 1 second, the drive is reset upon
release of the button. If the button is active for more than 1 second, the drive enters Autobalance mode.
The switch is debounced to prevent multiple entries into the Autobalance routines if the switch is held
down for longer than 1 second.
Pushbutton
> 1 Second = Autobalance
< 1 Second = Drive Reset
The push button can also be used during a power-on-reset to display the full part number of the software.
To use this feature, hold the push button in while applying bias power. The display will begin flashing the
full part number. Release the button before the part number display completes. See the section on
Software Version Display below.
8.2 LED Display
The LED Display indicates the status of the drive. Following a reset or POR, the LED will flash all
segments as a check to make sure they are working. The software version and revision are shown next.
The display will blank briefly (1/2 sec.) and the drive status or a system fault will be indicated. The drive is
fully functioning when the status is shown (“C” or “0”). When a fault is shown, the drive is disabled and
cannot be enabled until the fault is cleared. For most faults, a reset or AR 1 command is needed to reset
the fault. A Bus Undervoltage (U) fault will be automatically cleared when the bus is at the proper operating
voltage. A Fatal Error (F) can only be cleared by a power on reset of the amplifier.
8.3 Software Version Display
The software version is shown only following a power-on-reset (not after a pushbutton reset). The version
information is presented as follows:
Example: Display shows 2.1.0-4
“2” = Upper level part number designator
“1” = Major Software Version
“0” = Minor Software Version
“4” = Number of current loop bandwidth settings
The full part number of the software can be displayed during power-on-reset by holding in the push button
and applying bias power. The part number will be displayed in the following format:
Example: 4002-12.2.0-2
“4002”= Varedan Technologies product code
“12” = Upper level part number designator
(“10”=LA-400, “11”=LA-525,“12”=LA4-07,13”=LA-200 )
“2” = Major Software Version
“0” = Minor Software Version
“2” = Number of current loop bandwidth settings
.
