DAB Evoplus
Electronic circulator pump for heating and cooling circuits, with remote setpoint and pump data.
The DAB Evoplus is an electronic circulator pump that moves water in heating, cooling and domestic hot water circuits in residential and commercial buildings. This Modbus RTU template reads power, head, estimated flow, speed, temperatures and alarms, and lets you switch the pump and set the regulation mode and setpoint from ModbusCloud.
- Protocol
- Modbus RTU
- Connection
- RS485, 19200 baud
- Registers
- 55, read and write
- Brand
- DAB
- Key readings
- Power · Pump head · Estimated flow · Motor speed · Liquid temperature · Pump status · Alarm history
- Available commands
- On, off or external · Regulation mode · Regulation setpoint · Economy setpoint reduction · Twin pump mode
- Compatible models
- Evoplus M/L (B, D) · Evoplus Small (B, D) · Evoplus B · Evoplus D · Evoplus Small
- Last updated
Registers (55)
55 read, 17 write
| Name | Unit | Access | Address (Hidden until you enter your email) | Function (hidden) | Type (hidden) |
|---|---|---|---|---|---|
| Pump Power | W | Read | |||
| Pump Head | m | Read | |||
| Estimated Flow | m³/h | Read | |||
| Motor Speed | rpm | Read | |||
| Output Current | mA | Read | |||
| Line Voltage | V | Read | |||
| Liquid Temperature | °C | Read | |||
| Liquid Temperature External Sensor | °C | Read | |||
| Electronic Board Temperature | °C | Read | |||
| Heatsink Temperature | °C | Read | |||
| Operating Time | h | Read | |||
| Pump Status | Read | ||||
| Pump Fault | Read | ||||
| Alarm History 1 (Most Recent) | Read | ||||
| Alarm History 2 | Read | ||||
| Alarm History 3 | Read | ||||
| Alarm History 4 | Read | ||||
| Alarm History 5 | Read | ||||
| Alarm History 6 | Read | ||||
| Alarm History 7 | Read | ||||
| Alarm History 8 | Read | ||||
| Alarm History 9 | Read | ||||
| Alarm History 10 | Read | ||||
| Alarm History 11 | Read | ||||
| Alarm History 12 | Read | ||||
| Alarm History 13 | Read | ||||
| Alarm History 14 | Read | ||||
| Alarm History 15 (Oldest) | Read | ||||
| On Off Ext | Read and write | ||||
| Regulation Mode | Read and write | ||||
| Regulation Setpoint | m | Read and write | |||
| Regulation Tmax | °C | Read and write | |||
| Auto Economy Mode | Read | ||||
| Economy Setpoint Reduction | % | Read and write | |||
| External Signal Type | Read and write | ||||
| Twin Pump System Mode | Read and write | ||||
| Max RPM Percent | % | Read and write | |||
| System Reset Alarm | Read and write | ||||
| System Clear History | Read and write | ||||
| Pump Reset Bits | Read and write | ||||
| Minimum Reply Delay | ms | Read and write | |||
| Modbus Address | Read and write | ||||
| Modbus Baud Rate | Read and write | ||||
| Modbus Parity | Read and write | ||||
| Modbus Stop Bits | Read and write | ||||
| Auto Ack Control Bits | Read and write | ||||
| Software Version A | Read | ||||
| Software Version B | Read | ||||
| Software Version C | Read | ||||
| Software Version D | Read | ||||
| Software Version E | Read | ||||
| Software Version F | Read | ||||
| Unit Family | Read | ||||
| Unit Type | Read | ||||
| Unit Version | Read |
Loading registers…
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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
- Show power, head and estimated flow of every circulator in a building on one dashboard.
- Get an email alert when Pump Fault is not 0 or a new alarm code appears in the alarm history.
- Compare operating hours and power over months to plan maintenance of the pumps.
- Lower the differential pressure setpoint from ModbusCloud during the night or in summer.
- Check that a twin pump really alternates every 24 hours by watching status and operating time.
Installation
Connect RS485 A (+), B (-) and the screen to terminals 2, 1 and 3 of the 13-pole connector and run the bus to the ModbusCloud Gateway. Terminate both ends of the line.
On the pump display, open the Modbus menu and set the address, baud rate, parity and stop bits. Defaults are address 1, 19200 baud, even parity, 1 stop bit.
Set parameter En to Enable. The Modbus port stays silent until you do.
In ModbusCloud, add a Modbus device with the same address and settings and import the DAB Evoplus template.
Check that Line Voltage reads about 230 V and that Pump Status shows 2 while the pump runs.
Things to watch for
The pump does not answer on the bus. What should I check?
First check that Modbus is enabled on the display (parameter En). Then compare address, baud rate, parity and stop bits with the ModbusCloud device; the pump defaults to 19200 baud with even parity. If the settings match, swap A and B and check the termination at both ends of the line.
Why do some registers show 32767?
The value 32767 (hex 7FFF) means the value is not available, for example the external temperature when no external sensor is connected. It is not a measurement and can be ignored or excluded from alarms.
What does the number in Regulation Mode mean?
The codes differ per software version. Read Software Version A and B first: Evoplus M/L 1.xx and 2.xx use codes 0 to 9, M/L 3.xx and Small 2.xx use 0 to 7, Small 1.xx uses 0 to 5. Look up the code in the DAB Modbus instructions for that version before you write a new mode.
What should I watch out for when writing to the pump?
A new mode or setpoint takes effect immediately and changes the flow in the whole circuit, so agree on values with whoever maintains the installation. Reset registers only act on a change from 0 to 1. On Evoplus Small the communication settings can only be changed on the display, and Power is reported in mW instead of W.
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