PqPlus UMD96
The PqPlus UMD96 is a three-phase front panel energy meter designed for switchboard and distribution panel monitoring in commercial and industrial buildings. Using Modbus TCP, this template reads per-phase voltages on L1, L2, and L3, per-phase currents, total and per-phase active power, total reactive power, and grid frequency. Per-phase active and reactive power registers give the resolution needed to detect load imbalances across phases. Connecting the UMD96 to the ModbusCloud Gateway brings all fifteen measurement channels into a single cloud dashboard with historical trending and threshold alerts.
- Protocol
- Modbus TCP
- Connection
- Ethernet, Modbus TCP
- Registers
- 15, read only
- Brand
- PqPlus
- Last updated
Registers (15)
15 read, 0 write
| Name | Unit | Access | Address (Hidden until you enter your email) | Function (hidden) | Type (hidden) |
|---|---|---|---|---|---|
| frequency | Hz | Read | |||
| voltage_l1 | V | Read | |||
| voltage_l2 | V | Read | |||
| voltage_l3 | V | Read | |||
| current_l1 | A | Read | |||
| current_l2 | A | Read | |||
| current_l3 | A | Read | |||
| active_power | W | Read | |||
| reactive_power | var | Read | |||
| active_power_l1 | W | Read | |||
| active_power_l2 | W | Read | |||
| active_power_l3 | W | Read | |||
| reactive_power_l1 | W | Read | |||
| reactive_power_l2 | W | Read | |||
| reactive_power_l3 | W | Read |
Loading registers…
Send your device list
If a device is not in the library yet, we build the template for free as soon as we have the register data.
Use cases
- Monitor per-phase active power on L1, L2, and L3 to detect and report load imbalances across the distribution panel.
- Track total reactive power over time to verify power-factor correction equipment is operating correctly.
- Alert on grid frequency deviations to identify supply quality issues before they affect sensitive equipment.
- Compare per-phase voltages against rated thresholds to catch transformer tap or neutral problems early.
- Report daily active power totals per phase to support tenant sub-metering or cost-allocation workflows.
Installation
Enable Modbus TCP on the UMD96 by navigating to the communication settings in the ENVIS configuration software or the device web interface, and assign a fixed IP address to replace the default DHCP assignment.
Connect the UMD96 Ethernet port to the same LAN segment as the ModbusCloud Gateway using a standard RJ45 patch cable, ensuring both devices can reach each other on port 502.
In your ModbusCloud portal, add a new gateway, then import the PqPlus UMD96 template and enter the meter's fixed IP address and Modbus unit ID (default unit ID is 1).
Verify the connection by checking the live value of the frequency register (address 4100) in the portal; a stable reading near 50 Hz confirms successful communication.
Things to watch for
All register reads return zero or an error. What is wrong?
Confirm the UMD96 has a fixed IP address and is reachable on port 502 from the ModbusCloud Gateway. By default the device uses DHCP, so the IP may have changed after a power cycle. Assign a static address in ENVIS or the device web interface and update the portal accordingly.
Voltage values look correct but power readings are all zero.
Check that current transformer inputs are wired and the CT ratio is correctly configured on the meter. The UMD96 calculates active and reactive power internally from voltage and current; if the current inputs are open or the CT ratio is set to zero, power registers will read zero even when voltage is present.
Phase power values seem swapped or sign is unexpected.
The UMD96 operates in six-quadrant mode, so active power per phase can be positive or negative depending on energy flow direction. Verify that voltage and current terminal wiring matches the phase sequence documented in the UMD96 installation manual, and that the CT polarity markings face the correct direction.
Register reads time out intermittently under high poll rates.
The UMD96 Modbus TCP server processes requests sequentially. Reduce your poll interval to no less than 500 ms between requests, or consolidate reads into fewer multi-register burst reads where addresses are contiguous. Grouping voltages (4352 to 4356), currents (4608 to 4612), and power values (4884 to 4908) into three separate reads reduces round-trips significantly.
More PqPlus templates
Want to see how it works?
