PCE GLB+ Wallbox

Use cases

• Monitor real-time per-phase power and current during EV charging sessions on a cloud dashboard.
• Track total and per-session energy consumption to verify billing or energy reporting.
• Set dynamic load management limits per phase remotely to prevent grid overload in multi-charger setups.
• Create an alert when vehicle state indicates a fault or unexpected disconnect.
• Enable or disable the charge point remotely via the CP availability register.
• Compare charging patterns across multiple PCE GLB+ wallboxes installed at one site.

Installation

1. 1Connect the ModbusCloud gateway (MCG or MLP series) to the same local network as the PCE GLB+ Wallbox.
2. 2Ensure Modbus TCP is enabled on the PCE GLB+ and note its IP address and Modbus TCP port (default is typically 502).
3. 3Configure the gateway with the correct IP address and unit ID of the wallbox.
4. 4Import the PCE GLB+ template from the ModbusCloud template library into your project.
5. 5Verify that live readings such as power, current, and vehicle state appear on the ModbusCloud dashboard.
6. 6Test a write command to one of the DLM sub distribution limit registers (613 to 615) and confirm the wallbox accepts the new value.

Things to watch for

01

Why do current readings look 1000 times too high?

Current registers on the PCE GLB+ are expressed in milliamps (mA). The template applies the correct scaling factor. If you see unexpected values, check that no additional scaling is applied in your gateway configuration.

02

Power values seem incorrect or show zero on one phase. What should I check?

Power registers are unsigned 32-bit (uint32) values that span two consecutive Modbus addresses. Make sure your gateway is configured to read both addresses as a single 32-bit register and that the byte or word order matches the wallbox output.

03

Can I read and write the DLM sub distribution limit registers?

Yes. Registers 613 to 615 are both readable and writable. You can read the current limit and update it remotely. After writing, read the register back to confirm the wallbox accepted the new value.

04

The OCPP status register does not update. What could be wrong?

Confirm that the wallbox firmware supports Modbus TCP register access for OCPP status. Also verify the correct Modbus unit ID is configured on the gateway. A mismatch will result in no response from the wallbox.

Registers (15)

15 read / 4 write

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