User guide

LA Stand-Alone Product User Guide
Revision A7
Page 25
3.3 Serial Commands
The following commands are supported over the serial port communications interface.
3.3.1 A – Alarm Reset
This command allows viewing or resetting the alarm status. “A” with no parameter is used to read the
alarm status. “A 1” is used to reset the alarm status. Note: When an alarm is detected by the system, the
drive is immediately disabled.
3.3.2 B – AutoBalance
This command is used to invoke the autobalance algorithm. During autobalance the display will indicate
“-“ (middle bar).
3.3.3 E – Enable Status
This command is used to set/view the enable state of the drive. Note: When an alarm is detected by the
system, the drive is immediately disabled.
There are two modes of Enable operation, Software and Hardware. In Hardware mode, the drive enable
is controlled by the hardware Enable input. A low on this input Enables the drive. A high or open on this
input disables the drive. The E command only allows viewing the enable state when in “hardware” enable
mode.
Software enable mode is configured following a reset and BEFORE the hardware input is used. The
drive will come up disabled and the E command can be used to enable (E1) or disable (E0) the drive. If at
any time during software mode operation, the hardware input goes low, the drive reverts to hardware
mode as described above.
3.3.4 e - Enable Level
This command sets or views the active level for the hardware enable input. Entering e 0 sets the level to
active low. Entering e 1 sets the level to active high. Entering e without any value returns the present
setting. The factory default level is 0 (active low) to enable.
3.3.5 F – Factory Defaults
This command is used to set all the parameters to the factory defaults. Use the “S” command to save
the settings to NVM following the F command. By not automatically saving the defaults, the user can
choose to go back to the original settings (that were in the drive before the F command was used) by
resetting the drive.
3.3.6 f - Fault Output Level
This command sets or views the active level for the Fault output. Entering f 0 sets the active Fault output
to low for a fault condition. Entering f 1 sets the active Fault output high for a fault condition. Entering f
without any value returns the present setting. The factory default level is 1 (active high) for a fault
condition.
3.3.7 H – Help
This command lists a summary of commands and their function.
3.3.8 L – List all parameters
This command lists all the user settable parameters and system readings to the display. The enable and
alarm status are also shown.