3. Modbus commands
NOTE * The controller has a limited number of digital inputs. See Digital inputs in the ASC 150 Solar Designer's
handbook for availability.
Commands in SEMI-AUTO mode
Command
Description
Start
The start sequence for the photovoltaic system is started. The breaker must be
closed before you can start the system.
Stop The PVS is stopped.
Close the PV breaker The controller closes the PV breaker if there is voltage on the busbar.
Open the PV breaker The controller ramps down and opens the PV breaker at the breaker open point.
Close the mains breaker
In applications with a PV system, a mains, and external gensets, it is only possible to
close the mains breaker if:
• The genset breaker(s) is open
• The PV breaker is closed.
The PV breaker must be closed to make sure there is no voltage on the busbar before
you close the mains breaker.
Open the mains breaker
The controller opens the mains breaker instantly.
3.3 Display settings
To adjust for ambient lighting, configure the display settings.
Settings > Basic settings > Controller settings > Display > Display control
Parameter
Text Range Default
9151 Backlight dimmer 0 to 15 * 12
9152 Green LEDs dimmer 1 to 15 * 15
9153 Red LEDs dimmer 1 to 15 * 15
9154 Contrast level to 0
9155 Sleep mode timer 1 to 1800 s 60 s
9156 Enable mode timer)
OFF
ON
ON
9157 Alarm Jump
OFF
ON
ON
9158 Engineering units
Bar/Celcius
PSI/Fahrenheit
Bar/Celcius
NOTE * Low numbers are minimum brightness and high numbers are maximum brightness.
3.4 Easy connect
You can use Easy connect in your energy management system if the application consists of only genset or ASC Solar
controllers. Easy connect is a fast and easy way to add more controllers to a new or existing application. Easy connect
commands normally come from the display, but they can also be sent from and Modbus.
More information
See Easy connect in the ASC 150 Solar Designer's handbook for how to activate and use Easy connect.
OPERATOR'S MANUAL 4189341347A EN Page 10 of 32
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