Engo EFAN-230 Zigbee Smart Thermostat Owner’s Manual
MODBUS RTU PROTOCOL FOR EFAN-230 CONTROLLER
Configuration
Configuration must be carried out by a qualified person with the appropriate authorization and technical knowledge, in
accordance with the standards and regulations of the country and the EU. The manufacturer will not be held responsible
for any conduct not in accordance with the instructions.
ATTENTION:
There may be additional protection requirements for the entire installation and configuration, which the installer/
programmer is responsible for maintaining.
SLAVE 1
SLAVE 2
SLAVE 3
SLAVE X
EFAN-230B
EFAN-230W
EFAN-230B
EFAN-230W
General information about MODBUS RTU
The MODBUS RTU structure uses a master-slave system to
exchange messages. It allows a maximum of 247 slaves,
but only one master. The master controls the operation of
the network and only it sends the request. Slaves do not
undertake transmissions on their own. Each communication
begins with the master making a request to the Slave, which
responds to the master with what it has been asked. The
master (computer) communicates with slaves (controllers)
in two-wire RS-485 mode. This uses data lines A+ and B- for
data exchange, which MUST be one twisted pair .
Magistral 1
master
SLAVE 1
EFAN-230B
SLAVE 2
EFAN-230W
SLAVE 3
E-B
SLAVE X
EFAN-230W
Magistral 2
Daisy Chain
No more than two wires can be connected to each terminal,
ensuring that a “Daisy Chain” (in series) or “straight line”
(direct) configuration is used. Star or network (open)
connection is not recommended, as reflections within the
cable can cause data corruption.
Star
Net
MODBUS RTU network operation - Slave mode
Engo’s MODBUS controller has the following features when operating as a slave in a MODBUS RTU network:
- Network connection via RS485 serial interface.
- Address, communication speed and byte format determined by hardware configuration.
- Allows access to all tags and data used in the controller’s ladder program.
- 8-bit slave address
- 32-bit data size (1 address = 32-bit data return)
- Each MODBUS data register has a size of 2 bytes.
ATTENTION:
Before the controller is connected to the RS-485 network, it must first be properly configured.
The communication settings are configured in the service parameters of the regulator (device).
ATTENTION:
Connecting unconfigured controllers to the RS-485 network will result in improper operation.
Copyright - This document may only be reproduced and distributed with the express permission of Engo Controls and may only be provided to authorized persons or
companies with the required technical expertise.
1
| General | Details |
|---|---|
| Name | Engo EFAN-230 Zigbee Smart Thermostat Owner’s Manual |
| Make | ENGO |
| Language | English |
| Filetype | PDF (Download) |
| File size | 0.12 MB |
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ENGO Controls EFAN-230 Manual: Questions and Answers
What does MODBUS Model ID mean on the ENGO Controls EFAN-230?
The slave address identifying this controller on the network, ranging from 1 to 247. Owner's Manual, p. 1
What is the S1-COM input for on the ENGO Controls EFAN-230?
It controls heating and cooling mode selection. Configuration determines whether it's inactive, switches modes via external contact, or changes modes automatically based on pipe temperature. Owner's Manual, p. 3
What's the difference between S1-COM and S2-COM input configuration on ENGO Controls?
S1-COM controls heating and cooling mode switching. S2-COM configures the occupancy sensor, floor sensor, or external temperature sensor. Owner's Manual, p. 3
Can I configure the ENGO Controls EFAN-230 to automatically switch between heating and cooling based on pipe temperature?
Yes. Set S1-COM input configuration to value 2, and the controller will automatically switch modes based on the pipe temperature thresholds you set in parameters P17 and P18. Owner's Manual, p. 3
What does the delta FAN parameter mean on the ENGO Controls EFAN-230?
It sets the temperature range width where the fan operates in heating mode. A small value makes the fan respond faster to temperature changes; a large value makes it respond more slowly. Owner's Manual, p. 3
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