TAIYEDQ TAC1100 energy meter
This guide describes how to connect a TAIYEDQ TAC1100 single-phase energy meter for DIN rail mounting (1TE) to the Currentt Navigator via Modbus RTU over RS485.
The TAIYEDQ TAC1100 is a single-phase energy meter with RS485 Modbus RTU interface. The meter is compact and suitable for DIN rail mounting.
Make sure each device on the RS485 bus has a unique Modbus address.
🔌 Connecting the meter
The meter is connected to the Currentt Navigator using a twisted pair data cable (for example CAT5 or CAT6 UTP). The cable contains two signal lines (A+ and B-) and optionally a ground connection. Always use a twisted pair for the signal lines — the twisting suppresses electromagnetic interference (EMI) and is essential for a reliable RS485 connection.
Connect the RS485 cable to the designated terminals on the TAC1100.
TAIYEDQ TAC1100: RS485 connection terminals
Always use a twisted pair for the A and B signal lines. The twisting of the pair suppresses electromagnetic interference (EMI) and is essential for a reliable RS485 connection, especially over longer distances.
Connect the ground on one side only: either to the Currentt Navigator or to the meter — but never on both sides. Connecting ground on both sides can cause a ground loop, leading to communication errors or equipment damage.
Connecting the cable
| TAIYEDQ TAC1100 | Currentt Navigator |
|---|---|
| A+ | A+ |
| B- | B- |
Bus topology
Preferably use a daisy-chain (series) topology. At short distances (< 25 meters), a star topology often works as well. Connect a maximum of 32 devices to a single RS485 bus. Place a 120 Ohm termination resistor at both ends of the bus.
The Currentt Navigator has a built-in termination resistor that can be enabled or disabled via software. By default, it is enabled.
⚙️ Configuration in the Currentt Navigator
After physically connecting the meter, the device must be added in the Currentt Navigator. This can be done in two ways:
Via the setup wizard (recommended)
- Click the settings icon (top right of the screen)
- Choose Setup wizard
- Follow the on-screen steps
Manual configuration
- Click the settings icon (top right of the screen)
- Go to Components
- Click the + button in the Meters section
- Select TAIYEDQ
- Choose the model TAC1100
- Specify what the meter will measure:
- Consumption and generation — the meter measures both consumption and feed-in (bidirectional)
- Consumption only — the meter measures consumption only
- Generation only — the meter measures generation only (for example, behind an inverter)
- Specify which phase the meter is connected to (L1, L2, or L3)
- Under Communication, select RS-485
- Set the communication parameters. The meter's default settings are pre-filled in the Navigator (see settings summary)
Additional options
- Measurement range: If possible, specify the measurement range in amperes that will be measured.
- Reverse meter direction: If the meter is physically installed in the wrong direction, the measurement direction can be reversed in software. This prevents the meter from registering consumption as generation (or vice versa) without physically reversing the meter.
- Use as PAP: This meter can also be used to measure the main connection (PAP, primary allocation point). In that case, select the "Use as PAP" option during configuration.
📋 Settings summary
| Parameter | Value |
|---|---|
| Brand | TAIYEDQ |
| Model | TAC1100 |
| Type | Single-phase energy meter |
| Baud rate | 9600 |
| Data bits | 8 |
| Parity | None |
| Modbus address | 1 (default) |
🔢 Setting the Modbus address
The TAC1100 is shipped with Modbus address 1 by default.
Via the display
- Press and hold the button for 5 seconds to open the password entry
- The password digit blinks. Press the button briefly to increment the digit
- Press and hold the button for 2 seconds to move to the next digit
- Repeat for all digits of the password
- Press and hold the button for 5 seconds to confirm the password
- After entering the correct password, the parameter settings menu opens
- Navigate to the communication address and change it in the same way (short press = increment, long press = next digit)
If no button is pressed for more than 10 seconds, the meter automatically returns to the main screen.
🛟 Troubleshooting
| Problem | Possible cause | Solution |
|---|---|---|
| No communication | Wrong A/B wiring | Swap the A and B wires |
| No communication | Wrong Modbus address | Verify that the address matches in both the meter and the Navigator |
| No communication | Parity is enabled on the meter | Set parity to None (disabled) |
| Intermittent communication | No twisted pair used | Use a twisted pair for the signal lines |
| Intermittent communication | Termination missing | Enable the termination resistor on the last device in the chain |
| Timeout errors | Wrong baud rate | Make sure the baud rate is 9600 on both sides |