KNX and Modbus water metering: track consumption with Chart’nX
Chart’nX tracks a building’s water consumption in a dedicated dashboard. Each measured meter reads its value from a KNX group address or a Modbus configuration, in liters, kiloliters or cubic meters. The form offers a total meter and groups, each made of a primary meter and its secondary meters, with calculated sums or differences. Presence can also be overlaid on consumption.
Solutions for your need
Section titled “Solutions for your need”| Need | Application | Guide |
|---|---|---|
| Name the dashboard and configure the total water meter | Chart’nX, General and Main meters | Configure the general information and the total meter |
| Overlay presence on a meter’s consumption | Chart’nX, Overlays, Presence / absence source, then + Add overlay on the meter | Configure the general information and the total meter |
| Group a primary meter and its secondary meters | Chart’nX, Sub-meters, + New group | Add a group and its water meters |
| Calculate a sum or a difference between the meters of a group | Chart’nX, Operations protocol | Compose a water calculation |
| Add several Modbus meters from the catalog to a group | Chart’nX, Import modbus in the group header | Import Modbus configurations |
| Choose the colors and card order, duplicate or remove a meter | Chart’nX, group cards and Display order | Organize the cards of a water dashboard |
| Clear a blockage: save refused, presence missing, inconsistent volume | Chart’nX | Troubleshoot a water dashboard |
The water dashboard opens from the Chart’nX section of Emergy’nX, then Configure (access from Emergy’nX). In this flow, New dashboard creates an energy dashboard: if your project has no water dashboard, contact support. For a Modbus meter missing from the catalog, declare its configuration, then test a reading. After saving, handle KNX monitoring if it is offered.
Good to know
Section titled “Good to know”- Each meter of a group, primary included, declares the unit it actually receives: Liter (L), Kiloliter (kL) or Cubic meter (m³). A group can mix these units: Chart’nX converts the values to liters before combining them.
- Index suits a cumulative reading, Not indexed a value that already represents the period or the instant. The non-zero Custom Factor starts at 1; it corrects the metering ratio, not the unit.
- A Real primary is a dedicated measurement; a Virtual (∑ secondaries) primary is the sum of the group’s secondaries and requires at least one secondary.
- The presence source is read over KNX or Modbus. Over KNX, its Group address uses the three-level format, for example the fictitious 1/2/3. In High / low state, the Present row states whether 1 or 0 means presence.
- Removing a group takes it out of the form without confirmation. Until the dashboard is saved, Cancel in the save bar returns to the last saved configuration.
- For a volume that looks wrong, first check the period and precision. A gap between the primary and the sum of the secondaries is not enough to conclude there is a leak.
For electrical energy, see Energy and metering; for gateways and registers, Modbus.
All Water metering guides
Section titled “All Water metering guides”Configuration and use
Section titled “Configuration and use”- Set up a Chart’nX water dashboard: name, presence and total meter
- Create a Chart’nX water meter group: primary and secondary meters
- Organize, duplicate or remove the cards of a Chart’nX water dashboard
- Calculate a sum or difference of water meters in Chart’nX