Westaflex WAC Treiber

ENGLISH Version

Table of Contents Einleitung Treiber Konzept Treiber Konfiguration Beispiele Hinweise

Einleitung

Our WAC Usage documention describes the protocol in detail and is the starting point for understanding everything else. It contains the fundamental ModBus knowledge you need in order to adapt successfully with our Binding. With this foundation in place, you will be ready to apply the ModBus network rules, so that your home appliances can interoperate with those produced by other manufacturers as part of the OpenHAB ecosystem. This will free consumers to choose the devices that best match their needs, and combine them in novel ways with other compatible devices. See below for guidance as to what to look out for in each section. The possibilities are endless.

Treiber Konzept

A key feature of ModBus that distinguishes it from other protocols is that any given node in the network can act as the master for one channel, and as the slave for another channel.  This allows complex network topologies to be formed.

Treiber Konfiguration

This section describes how the host (MCU, PC interface etc) can interface with the WAC chip. Extended messaging is also introduced, which is useful if you need to include additional information such as the Device Number. Note that extended messaging does not extend the size of the data payload, which is fixed at 8 bytes and cannot be altered.

Kennzeichnung	Modbus Variable	Datenadresse	Werte
Frostschutz	01h_Read_Coils	0	1-aktiv, 0-passiv
	Frostschutzfunktion des Plattenwärmetauschers
Feuer	01h_Read_Coils	1	1-aktiv, 0-passiv
	Überhitzungsalarm Anzeige
Filtertausch	01h_Read_Coils	2	1-aktiv, 0-passiv
	Filter verschmutzt, Austausch Signal
Ventilation	01h_Read_Coils	3	1-aktiv, 0-passiv
	Lüfteralarm Fehlfunktions-Anzeige
Spannung	01h_Read_Coils	5	1-aktiv, 0-passiv
	Niedrige Stromspannung Hinweis
Temperatur	01h_Read_Coils	6	1-aktiv, 0-passiv
	Sensor Temperatur Alarmmeldung
Abluftwärme	01h_Read_Coils	7	1-aktiv, 0-passiv
	Hinweisgeber zur Abluft-Temperatur
Zuluftwärme	01h_Read_Coils	8	1-aktiv, 0-passiv
	Hinweissignal des Zuluft-Temperatursensors
Feuchtigkeit	01h_Read_Coils	9	1-aktiv, 0-passiv
	DTJ(100) Feuchtigkeits-Alarm (Sensormeldung ab einer Sättigung von 70%)
ReturnWater	01h_Read_Coils	10	1-aktiv, 0-passiv
	Return water temperature sensor alarm
ToutDoor	01h_Read_Coils	11	1-aktiv, 0-passiv
	Outside air temperature sensor alarm (controller continues to work in determing ToutDoor less than zero degree)
MotorActive	01h_Read_Coils	12	1-aktiv, 0-passiv
	Fans ON
InDumpper	04h_Read_Input	13	0-90
	Outside air damper actuator
Preheater	01h_Read_Coils	14	1-aktiv, 0-passiv
	Preheater indication
Heater	01h_Read_Coils	15	1-aktiv, 0-passiv
	Heater indication
Speed	06h_Write_Holding_Register	16	0, 1, 2, 3
	Fans speed setting
TsetPoint	06h_Write_Holding_Register	17	0-30
	Supply air temperature set
RH_value	04h_Read_Input	18	0-99
	DTJ(100) humidity sensor value
Motor1	04h_Read_Input	19	0-3
	Motor 1 fan speed value
Motor2	04h_Read_Input	20	0-3
	Motor 2 fan speed value
Tlimit	04h_Read_Input	21	Hex: E0
	Supply air temperature value
Texhaust	04h_Read_Input	22	Hex: E0
	DTJ(100) temperature sensor value
Textract	04h_Read_Input	23	Hex: E0
	Exhaust air temperature sensor value
ToutDoor	04h_Read_Input	24	Hex: FFEC
	Outside air temperature sensor value
Twater	04h_Read_Input	25	Hex: FFEC
	Return water temperature value

Beispiele

to handle many slaves in RTU mode, non blocking connections and RTS flow control.....

modbus_t *mb;

  uint16_t tab_reg[32];

  mb = modbus_new_tcp("127.0.0.1", 1502);
  modbus_connect(mb);

  /* Read 5 registers from the address 0 */
  modbus_read_registers(mb, 0, 5, tab_reg);

  modbus_close(mb);
  modbus_free(mb);

See Examples of typical WAC Bindings, if you have any suggestions or questions don't hesitate to contact us or use the openHAB google group. The snapshot version of our industry4.0 binding can be downloaded, together with the rest of openhab.

Hinweise

Congratulations! You should now have a good general understanding of how the WAC ModBus protocol works, which will give you a strong foundation for all the work you do with OpenHAB. Be Inspired →by our genuine Apps...