Alencon SPOT: Installation,
Operation, and Maintenance Manual
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P a g e
10.1.2 COMMANDS
The following list contains the most common and useful commands that can be given to the
SPOT from the PODD UI or external controller via Modbus. For full details on available Modbus
commands and registers, please request Modbus Maps from your Alencon representative or
Technical Support.
Clear Error
– remove error code flags from the UI, by setting error code to 0. This has no
effect on the state machine/operational flow of the SPOT.
Shutdown
– set the DCDC converter to the SHUTDOWN state and cease all power
production.
System Reset
– initialize the DCDC converter to accept operating commands, which can
be actively or automatically delivered.
Standby
– set the DCDC converter to the STANDBY state and cease all power production
Set Control
– Issue operating commands for how the SPOT should produce power.
Including control mode, setpoint, and setpoint timeout.
o
Options for control mode include:
MPPT – default autonomous operation (doesn’t require setpoint)
Constant power – requires actively choosing the power setpoint
Constant current – requires actively choosing the current setpoint
10.1.3 CONDITIONS
Bootup in shutdown
This condition when set to 1 requires a
System Reset
command each time the SPOT is turned
on (i.e., gets input power). As default this is set to 0, so the SPOT operates with the sun cycle.
Control mode set
This is set to MPPT as default for most SPOT units. In some cases, different control modes will
be used on the SPOT including:
Primary current
Secondary current
Primary power
Secondary power
For
control mode set
to evaluate as true; the control mode, the setpoint, and the setpoint
timeout must be written (except when control mode = MPPT).
Voltages, currents, temps within STARTUP range (Startup limits)
Tests operating conditions are in the permissible startup range as defined in the config file,
including:
On board temperature
Transistor temperature
Input and Output Voltages
