Charts

Last modified: 2026-04-16

You can visualize the values currently being measured by your devices under Cockpit > Charts. Measurements are displayed in 1-minute interval values. This feature can be used e.g. for troubleshooting purposes.

Configure a chart

Prerequisites

• At least one device is installed on your blueLog.

Steps

1. Navigate to Cockpit > Charts.

2. Under Value selection, select the device type(s) you want to display.

   • The active device category is underlined in blue.

3. Select the devices you want to display (maximum 20). Select all to select all devices of a category.

   • Example: “Inverters 1/2” means that two inverters are configured and you have selected one to display.

4. Under Values, select the values you want to display. The Select all option allows you to select all values of a category.

   • Measurements are displayed in 1-minute interval values.

   • The two Y-axes allow you to display a maximum of 2 different units.

5. All devices and values you have selected are displayed as a chart.

   • Zoom in and out to display a wide range of periods, e.g., from 6 months to 5 minutes.

   • Move the cursor over the chart to display the values at each point for each device.

   • Activate the toggle Realtime values to display real-time values, if these are available. See also Realtime values.

   • Download a CSV file of the values in your chart.

Note

Cos phi (also known as cos φ or power factor) is a calculated value.

When multiple real meters are combined into a virtual meter, the cos phi value is calculated based on the following formula:

Variables

• P is the measured active power sum of all phases

• Q is the measured reactive power sum of all phases

• tan^-1 represents the arctangent function

• sgn(Q) represents the sign of Q, so if Q is underexcited it is -1, otherwise it is 1

Any measured values from the individual meters are ignored.

Check communication between bluelog and another device

You can check how well communication is working between the bluelog and a device using the Telegrams received and Telegrams transmitted checkboxes under Values. The transmitted and received telegram counts should match, confirming that commands are successfully sent and acknowledged. A mismatch may signal a device issue or require adjustments to the read delay or timeout settings.

Prerequisites

• At least one device is installed on your bluelog.

• The device is connected via RS485 or Ethernet.

Steps

1. Go to Cockpit > Charts (to display information as a chart) or Cockpit > Realtime values (to display information in a list).

2. If multiple devices are installed, select the relevant device category (e.g., Inverters). You can view multiple categories at once.

3. Select the device(s) by ticking the checkboxes, or choose Select all to include all devices in a category.

4. Tick Telegrams received and Telegrams transmitted under Values.

5. You can view the telegrams in the Chart area. To view the telegrams in the Realtime values area, select View.

6. If the transmitted and received telegram counts do not match, indicating a potential issue, contact Support for assistance.