ESR21

Heating - DL-Bus (Technische Alternative) COLLECTION C

Introduction

The ESR21 unit is a simple solar control.

The ESR21 unit is a differential control that can be used in many ways

  • The DL bus runs at 12 volts.

  • The data frame consist of 30 bytes (excluding sync and CRC).

  • The data are transmitted @ 488Hz, therefore the transmission of one data set takes about 0.67 seconds.

../_images/P092_ESR21.png

Wiring

../_images/P092_12V_Wiring.png

Protocol

../_images/P092_ESR21_Protocol.png

Setup

Note

A new device task must be created for each value to be read from the DL bus!

../_images/P092_Setup.png

Task settings

  • Device: Heating - DL-Bus (Technische Alternative)

  • Name: Name of the task (example name ValueN, where N is a number).

  • Enable: Should the task be enabled or not

Sensor

  • 1st GPIO: DL bus input e.g. GPIO 14 (D5)

  • DL-Bus Type: ESR21

Note

The settings for 1st GPIO and DL-Bus Type must be the same for all used DL bus tasks!

Inputs

Note

The description of the Frame data and the related Frame bytes can be found in the section Protocol!

Frame data

Frame bytes

Value

Index

Decimals

Sensor1 … Sensor3

3 … 8

Sensor

1 - 3

1

Ext1 … Ext6

9 … 20

Ext. Sensor

1 - 6

1

Output byte

21

Digital Output

0

Speed step

22

Speed step

0

Analog output

23

Analog output

1

Current power

25,26

Heat power [kW]

1

Heat quantity

27 … 30

Heat meter [MWh]

4

Data acquisition

  • Send to controller 1..3: Check which controller (if any) you want to publish to. All or no controller can be used.

  • Interval: How often should the task publish its value (10..60 seconds is normal).

Note

Interval not less than 10 seconds! The reading of the DL bus happens twice per interval.