Shared Runtime Power Management

Use this page to configure the shared runtime settings that affect power consumption, battery charging, and hardware functions that can be disabled to reduce load. This page is most relevant on low-power or solar-powered installations.

Lower power consumption usually means that some hardware functions stay off more often or that the equipment reacts more slowly. Treat these settings as a practical tradeoff, not as a general optimisation step.

Review these settings only when the installation has a real power-budget reason to reduce consumption.
Confirm which outputs, inputs, charger functions, and display functions are actually needed before you disable them.
Leave the advanced power settings unchanged unless the installation needs a deliberate low-power setup.

Best Practice

On solar-powered installations, disable only the functions that are not needed in the real installation.
Do not reduce processor speed or disable charging until the installation has been commissioned and the functional impact is understood.
If a function powers field hardware, verify the downstream equipment behavior before you leave the installation.

DC Output 1

Reduce power consumption by disabling DC output 1 when it is not needed.

Use category: Installation-dependent.
Disable this output only when no connected field hardware requires power from DC output 1.
If DC output 1 supplies a sensor or accessory, disabling it will remove power from that hardware immediately.

Parameter Index Range Format Default Example

PM33V

0..1

0 = Disable DC output 1

1 = Enable DC output 1

PM33V 1

DC Output 2

Reduce power consumption by disabling DC output 2 when it is not needed.

Use category: Installation-dependent.
Disable this output only when no connected field hardware requires power from DC output 2.
If DC output 2 supplies a sensor or accessory, disabling it will remove power from that hardware immediately.

Parameter Index Range Format Default Example

PM12V

0..1

0 = Disable DC output 2

1 = Enable DC output 2

PM12V 0

Counter Inputs

Reduce power consumption by disabling the counter inputs when they are not needed.

Use category: Installation-dependent.
Disable the counter inputs only when the installation does not use pulse counting or counter-based monitoring.
If the installation depends on counter inputs, leave this function enabled.

Parameter Index Range Format Default Example

PMSNUL

0..1

0 = Disable counter inputs

1 = Enable counter inputs

PMSNUL 0

Battery Charger

Reduce power consumption by disabling the internal battery charger.

Use category: Advanced - leave default unless you know what you are doing.
If the internal battery charger is disabled, the internal battery-backup function is also disabled.
Use this only when the installation has a deliberate external power strategy and does not need internal battery charging.

Parameter Index Range Format Default Example

PMCHG

0..1

0 = Enable internal battery charging

1 = Disable internal battery charging and battery backup function

PMCHG 1

Processor Speed

Reduce power consumption by lowering the processor speed.

Use category: Advanced - leave default unless you know what you are doing.
Lower processor speed also makes the equipment slower.
After changing this setting, verify that the installation still reacts fast enough in normal operation and alarm handling.

Parameter Index Range Format Default Example

PMCPU

0..4

0 = Very fast

1 = Fast

2 = Medium

3 = Slow

4 = Very slow

PMCPU 1

Display

Reduce power consumption by disabling the display.

Use category: Optional feature setting.
This applies only to hardware with a display.
On VX40 hardware, pressing the OK button turns the display on for 2 minutes.

Parameter Index Range Format Default Example

PMDISP

0..1

0 = Enable display

1 = Disable display

PMDISP 1