Tecalor THZ Heatpump - Versionsgeschichte

Mwuerr: Englische Version als veraltet markiert.

2024-01-20T14:01:39Z

Englische Version als veraltet markiert.

← Nächstältere Version		Version vom 20. Januar 2024, 16:01 Uhr
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	\|ModOwner=immiimmi		\|ModOwner=immiimmi
	}}German version: [[Tecalor THZ Wärmepumpe]]		}}German version: [[Tecalor THZ Wärmepumpe]]



			This article is partially outdated. If you can use the [[Tecalor THZ Wärmepumpe\|german version]], e.g. using your favorite translator. We hope to bring the english version up to date somewhen in the future.






	This article describes how to connect to a Stiebel Eltron / Tecalor THZ/LWZ 303/304/403/404/504/8CS heatpump and to read and write settings from and to the heating.		This article describes how to connect to a Stiebel Eltron / Tecalor THZ/LWZ 303/304/403/404/504/8CS heatpump and to read and write settings from and to the heating.

Mwuerr: nach Tests durch mwuerr THZ504 (und LWZ8CS) in die Liste der unterstützten Geräte aufgenommen

2024-01-12T21:50:32Z

nach Tests durch mwuerr THZ504 (und LWZ8CS) in die Liste der unterstützten Geräte aufgenommen

← Nächstältere Version		Version vom 12. Januar 2024, 23:50 Uhr
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	}}German version: [[Tecalor THZ Wärmepumpe]]		}}German version: [[Tecalor THZ Wärmepumpe]]

	This article describes how to connect to a Stiebel Eltron / Tecalor THZ/LWZ 303/304/403/404 heatpump and to read and write settings from and to the heating~~. 504 not tested yet but may also work~~.		This article describes how to connect to a Stiebel Eltron / Tecalor THZ/LWZ 303/304/403/404/504/8CS heatpump and to read and write settings from and to the heating.

	For better understanding: Tecalor is the end customer brand of Stiebel Eltron. In the following the system will be called "THZ"		For better understanding: Tecalor is the end customer brand of Stiebel Eltron. In the following the system will be called "THZ"

Mwuerr: Alle Überschriften um eine Ebene nach unten verschoben entsprechend FHEMWiki:Über FHEMWiki#Gewünschtes Verhalten / "Do and Don't" Überschriften auf "Ebene 1" (ein "=") sollen im Wiki-Artikel nicht verwendet werden. Diese Ebene ist reserviert für den Artikel.

2024-01-06T23:36:42Z

Alle Überschriften um eine Ebene nach unten verschoben entsprechend FHEMWiki:Über FHEMWiki#Gewünschtes Verhalten / "Do and Don't" Überschriften auf "Ebene 1" (ein "=") sollen im Wiki-Artikel nicht verwendet werden. Diese Ebene ist reserviert für den Artikel.

← Nächstältere Version		Version vom 7. Januar 2024, 01:36 Uhr
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	If you update you sure have to reconfigure readingsGroups, dashboards, and so...		If you update you sure have to reconfigure readingsGroups, dashboards, and so...

	=Connection to the heatpump=		==Connection to the heatpump==
	==Local via RS232 or USB==		===Local via RS232 or USB===
	The THZ has two interface which can be used for a connection.		The THZ has two interface which can be used for a connection.
	* One serial interface behind the right door which can be used with a MNL-SG3 Plug		* One serial interface behind the right door which can be used with a MNL-SG3 Plug
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	More information how to connect to the heatpump with RS232 can be found here: [http://robert.penz.name/heat-pump-lwz/ Robert Penz Homepage]		More information how to connect to the heatpump with RS232 can be found here: [http://robert.penz.name/heat-pump-lwz/ Robert Penz Homepage]

	==Remote connection with Ser2Net==		===Remote connection with Ser2Net===
	If the FHEM server is not near the heatpump you can connect with Ser2Net. This will provide a virtual serial interface on a TCP-Port		If the FHEM server is not near the heatpump you can connect with Ser2Net. This will provide a virtual serial interface on a TCP-Port

	===Installation Ser2Net on Linux===		====Installation Ser2Net on Linux====
	To install Serial-Port-Server Ser2Net just follow these steps:		To install Serial-Port-Server Ser2Net just follow these steps:
	:<code>sudo apt-get install ser2net</code>		:<code>sudo apt-get install ser2net</code>
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	The port can be chosen on your own as long as it's still unused.		The port can be chosen on your own as long as it's still unused.

	==Tested Host-Systems==		===Tested Host-Systems===
	This module was tested on FritzBox, nas-qnap, Raspberry Pi and MacOS.		This module was tested on FritzBox, nas-qnap, Raspberry Pi and MacOS.

	=Definition in FHEM=		==Definition in FHEM==
	==Direct RS232 serial or USB==		===Direct RS232 serial or USB===
	:<code>define Mythz THZ /dev/ttyUSB0@115200 # or (/dev/ttyXXX)</code>		:<code>define Mythz THZ /dev/ttyUSB0@115200 # or (/dev/ttyXXX)</code>
	:<code>attr Mythz interval_sGlobal 300 # Internal Polling Interval 5min</code>		:<code>attr Mythz interval_sGlobal 300 # Internal Polling Interval 5min</code>
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	:<code>define FileLog_Mythz FileLog ./log/Mythz-%Y.log Mythz </code>		:<code>define FileLog_Mythz FileLog ./log/Mythz-%Y.log Mythz </code>

	==Over network with Ser2Net==		===Over network with Ser2Net===
	:<code>define Mythz THZ 192.168.0.244:2003</code>		:<code>define Mythz THZ 192.168.0.244:2003</code>
	:<code>attr Mythz interval_sGlobal 300 # Internal Polling Interval 5min</code>		:<code>attr Mythz interval_sGlobal 300 # Internal Polling Interval 5min</code>
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	:<code>define FileLog_Mythz FileLog ./log/Mythz-%Y.log Mythz</code>		:<code>define FileLog_Mythz FileLog ./log/Mythz-%Y.log Mythz</code>

	=Readings=		==Readings==
	If the connection to the heatpump was successful you should see readings like sGlobal, sFirmware, sHistory and some settings like holiday and pXX parameters.einige PXX Werte angezeigt werden.		If the connection to the heatpump was successful you should see readings like sGlobal, sFirmware, sHistory and some settings like holiday and pXX parameters.einige PXX Werte angezeigt werden.

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	There are some more "s"tatus readings with show you values like the heat recovery		There are some more "s"tatus readings with show you values like the heat recovery

	= Plots - graphical views =		== Plots - graphical views ==
	This shows you how to create plots from the heatpump readings.		This shows you how to create plots from the heatpump readings.

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	More information to [[Creating Plots]]		More information to [[Creating Plots]]

	=extract single values from readings=		==extract single values from readings==
	To separate values to from the "big readings" like sGlobal or history you can use a userReading.		To separate values to from the "big readings" like sGlobal or history you can use a userReading.

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	More information to userReadings can be found in the {{Link2CmdRef}}.		More information to userReadings can be found in the {{Link2CmdRef}}.

	= Notes =		== Notes ==

	* A full refresh (of all parameters) is done only at systemstart, very very slowly (not to decrease performance of FHEM), and takes ca 3 or 4 minutes. After that the intervall polling of sGlobal and sHistory register should start.		* A full refresh (of all parameters) is done only at systemstart, very very slowly (not to decrease performance of FHEM), and takes ca 3 or 4 minutes. After that the intervall polling of sGlobal and sHistory register should start.
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	* in summermode roomSetTemp (from sHC1) is given from p01RoomTempDayHC1SummerMode and p02RoomTempNightHC1SummerMode		* in summermode roomSetTemp (from sHC1) is given from p01RoomTempDayHC1SummerMode and p02RoomTempNightHC1SummerMode

	= known Problems =		== known Problems ==
	In the FHEM Log you will find messages like this when using Ser2Net:		In the FHEM Log you will find messages like this when using Ser2Net:
	:<code>2014.03.02 09:41:09 1: 192.168.178.50:2003 disconnected, waiting to reappear		:<code>2014.03.02 09:41:09 1: 192.168.178.50:2003 disconnected, waiting to reappear
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	This problem is not solved until now.		This problem is not solved until now.

	= Release History =		== Release History ==
	'''v0.067'''		'''v0.067'''

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	* fixed: According the manual our p99RoomThermCorrection is actually P76		* fixed: According the manual our p99RoomThermCorrection is actually P76

	= Beispielkonfiguration =		== Beispielkonfiguration ==

	'''Start Definition mit Ser2Net'''		'''Start Definition mit Ser2Net'''
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	attr FanSelectorNight room heatpump</code>		attr FanSelectorNight room heatpump</code>

	= Links =		== Links ==
	[https://launchpad.net/heatpumpmonitor Launchpad Heatpumpmonitor]		[https://launchpad.net/heatpumpmonitor Launchpad Heatpumpmonitor]

Baumbuwe: Vorlage Link2CmdRef

2018-01-31T13:27:47Z

Vorlage Link2CmdRef

← Nächstältere Version		Version vom 31. Januar 2018, 15:27 Uhr
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	FlowTemp {(split ' ',ReadingsVal("Mythz","sGlobal",0))[3]}</code>		FlowTemp {(split ' ',ReadingsVal("Mythz","sGlobal",0))[3]}</code>

	More information to userReadings can be found in the ~~[http://fhem~~.~~de/commandref_DE.html CommandRef]~~		More information to userReadings can be found in the {{Link2CmdRef}}.

	= Notes =		= Notes =

Markusbloch: Ersetzung von Forum-Links mit Vorlage Link2Forum

2017-03-19T19:34:51Z

Ersetzung von Forum-Links mit Vorlage Link2Forum

← Nächstältere Version		Version vom 19. März 2017, 21:34 Uhr
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	[https://launchpad.net/heatpumpmonitor Launchpad Heatpumpmonitor]		[https://launchpad.net/heatpumpmonitor Launchpad Heatpumpmonitor]

	~~[http://forum.fhem.de/index.php/topic,~~13132~~.0.html~~ Thread in the FHEM-Forum]		{{Link2Forum\|Topic=13132\|LinkText=Thread in the FHEM-Forum}}

	[[Kategorie:Other Components]]		[[Kategorie:Other Components]]
	[[Kategorie:Heizungssteuerung]]		[[Kategorie:Heizungssteuerung]]

Krikan: /* Beispielkonfiguration */

2016-05-04T11:35:42Z

Beispielkonfiguration

← Nächstältere Version		Version vom 4. Mai 2016, 13:35 Uhr
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	[[File:dash.jpg\|thumb]]		[[File:dash.jpg\|thumb]]

	<code>attr Mythz userReadings AussenTemp:sGlobal.* {(split ' ',ReadingsVal("Mythz","sGlobal",0))[1]}, VorlaufTemp:sGlobal {(split ' ',ReadingsVal("Mythz","sGlobal",0))[3]}, RuecklaufTemp:sGlobal {(split ' ',ReadingsVal("Mythz","sGlobal",0))[5]}, WWTemp:sGlobal {(split ' ',ReadingsVal("Mythz","sGlobal",0))[9]}, KollektorTemp:sGlobal {(split ' ',ReadingsVal("Mythz","sGlobal",0))[79]}</code>		<code>attr Mythz userReadings AussenTemp:sGlobal.* {(split ' ',ReadingsVal("Mythz","sGlobal",0))[1]}, VorlaufTemp:sGlobal.* {(split ' ',ReadingsVal("Mythz","sGlobal",0))[3]}, RuecklaufTemp:sGlobal.* {(split ' ',ReadingsVal("Mythz","sGlobal",0))[5]}, WWTemp:sGlobal.* {(split ' ',ReadingsVal("Mythz","sGlobal",0))[9]}, KollektorTemp:sGlobal.* {(split ' ',ReadingsVal("Mythz","sGlobal",0))[79]}</code>

	'''interval Defintionen'''		'''interval Defintionen'''

Krikan: /* Beispielkonfiguration */ -> Anpassung an geändertes trigger-Verhalten userReadings

2016-05-04T08:57:07Z

Beispielkonfiguration: -> Anpassung an geändertes trigger-Verhalten userReadings

← Nächstältere Version		Version vom 4. Mai 2016, 10:57 Uhr
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	'''Start Definition mit Ser2Net'''		'''Start Definition mit Ser2Net'''

	<code>		<code>define Mythz THZ 192.168.111.5:2003<br>
	define Mythz THZ 192.168.111.5:2003<br>		attr Mythz room Sysintern</code>
	attr Mythz room Sysintern
	</code>

	'''userReadings'''		'''userReadings'''
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	[[File:dash.jpg\|thumb]]		[[File:dash.jpg\|thumb]]

	<code>		<code>attr Mythz userReadings AussenTemp:sGlobal.* {(split ' ',ReadingsVal("Mythz","sGlobal",0))[1]}, VorlaufTemp:sGlobal {(split ' ',ReadingsVal("Mythz","sGlobal",0))[3]}, RuecklaufTemp:sGlobal {(split ' ',ReadingsVal("Mythz","sGlobal",0))[5]}, WWTemp:sGlobal {(split ' ',ReadingsVal("Mythz","sGlobal",0))[9]}, KollektorTemp:sGlobal {(split ' ',ReadingsVal("Mythz","sGlobal",0))[79]}</code>
	attr Mythz userReadings AussenTemp:sGlobal {(split ' ',ReadingsVal("Mythz","sGlobal",0))[1]}, VorlaufTemp:sGlobal {(split ' ',ReadingsVal("Mythz","sGlobal",0))[3]}, RuecklaufTemp:sGlobal {(split ' ',ReadingsVal("Mythz","sGlobal",0))[5]}, WWTemp:sGlobal {(split ' ',ReadingsVal("Mythz","sGlobal",0))[9]}, KollektorTemp:sGlobal {(split ' ',ReadingsVal("Mythz","sGlobal",0))[79]}
	</code>

	'''interval Defintionen'''		'''interval Defintionen'''

	<code>		<code>attr Mythz interval_sGlobal 300 <br>
	attr Mythz interval_sGlobal 300 <br>
	attr Mythz interval_sHistory 28800 <br>		attr Mythz interval_sHistory 28800 <br>
	attr Mythz interval_sLast10errors 120 <br>		attr Mythz interval_sLast10errors 120 <br></code>
	</code>

	'''Definition von file-log und den SVG-Plots einiger Daten'''		'''Definition von file-log und den SVG-Plots einiger Daten'''

	<code>		<code>define FileLog_Mythz FileLog ./log/Mythz-%Y-%m.log Mythz<br>
	define FileLog_Mythz FileLog ./log/Mythz-%Y-%m.log Mythz<br>
	define wal_0 SVG FileLog_Mythz:thz:CURRENT<br>		define wal_0 SVG FileLog_Mythz:thz:CURRENT<br>
	attr wal_0 room Heizung<br>		attr wal_0 room Heizung<br>
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	attr wal_3 room Heizung<br>		attr wal_3 room Heizung<br>
	define wal_4 SVG FileLog_Mythz:thz4:CURRENT<br>		define wal_4 SVG FileLog_Mythz:thz4:CURRENT<br>
	attr wal_4 room Heizung<br>		attr wal_4 room Heizung<br></code>
	</code>

	'''readingsGroup'''		'''readingsGroup'''

	<code>		<code>define rg_thz readingsGroup Mythz:<%temp_outside>,<Aussen>,AussenTemp Mythz:<%sani_supply_temp@red>,<Vorlauf>,VorlaufTemp Mythz:<%sani_return_temp@blue>,<Rücklauf>,RuecklaufTemp Mythz:<%sani_boiler_temp@BD7800>,<Wasser>,WWTemp Mythz:<%sani_solar_temp>,<Kollektor>,KollektorTemp
	define rg_thz readingsGroup Mythz:<%temp_outside>,<Aussen>,AussenTemp Mythz:<%sani_supply_temp@red>,<Vorlauf>,VorlaufTemp Mythz:<%sani_return_temp@blue>,<Rücklauf>,RuecklaufTemp Mythz:<%sani_boiler_temp@BD7800>,<Wasser>,WWTemp Mythz:<%sani_solar_temp>,<Kollektor>,KollektorTemp
	<br>		<br>
	attr rg_thz alias Heizung Temperaturen<br>		attr rg_thz alias Heizung Temperaturen<br>
	attr rg_thz group THZ<br>		attr rg_thz group THZ<br>
	attr rg_thz room Sysintern<br>		attr rg_thz room Sysintern<br>
	attr rg_thz valueFormat { AussenTemp => '%1.f °C', VorlaufTemp => '%1.f °C', AussenTemp=> '%1.f °C', RuecklaufTemp=> '%1.f °C', WWTemp=> '%1.f °C', KollektorTemp=> '%1.f °C' }		attr rg_thz valueFormat { AussenTemp => '%1.f °C', VorlaufTemp => '%1.f °C', AussenTemp=> '%1.f °C', RuecklaufTemp=> '%1.f °C', WWTemp=> '%1.f °C', KollektorTemp=> '%1.f °C' }</code>
	</code>

	'''Dashboard'''		'''Dashboard'''

	<code>		<code>define MyDashboard Dashboard<br>
	define MyDashboard Dashboard<br>
	attr MyDashboard dashboard_lockstate unlock<br>		attr MyDashboard dashboard_lockstate unlock<br>
	attr MyDashboard dashboard_row top-center<br>		attr MyDashboard dashboard_row top-center<br>
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	attr MyDashboard dashboard_webfrontendfilter WEB<br>		attr MyDashboard dashboard_webfrontendfilter WEB<br>
	define MyDashboard_weblink weblink htmlCode {DashboardAsHtml("MyDashboard")}<br>		define MyDashboard_weblink weblink htmlCode {DashboardAsHtml("MyDashboard")}<br>
	attr MyDashboard_weblink room DashboardRoom		attr MyDashboard_weblink room DashboardRoom</code>
	</code>

	'''FanSelector für die Lüftungssteuerung'''		'''FanSelector für die Lüftungssteuerung'''

	<code>		<code>define FanSelectorDay dummy<br>
	define FanSelectorDay dummy<br>
	attr FanSelectorDay group THZ<br>		attr FanSelectorDay group THZ<br>
	attr FanSelectorDay setList 0 1 2 3 offFor60min<br>		attr FanSelectorDay setList 0 1 2 3 offFor60min<br>
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	define Notify_p07FanStageDay notify FanSelectorDay IF ([FanSelectorDay] eq "offFor60min") (define at_D_offFor60min at +00:59:00 set Mythz p07FanStageDay [Mythz:p07FanStageDay],set Mythz p07FanStageDay 0, setstate FanSelectorDay offFor60min) ELSE (set Mythz p07FanStageDay $EVENT)<br>		define Notify_p07FanStageDay notify FanSelectorDay IF ([FanSelectorDay] eq "offFor60min") (define at_D_offFor60min at +00:59:00 set Mythz p07FanStageDay [Mythz:p07FanStageDay],set Mythz p07FanStageDay 0, setstate FanSelectorDay offFor60min) ELSE (set Mythz p07FanStageDay $EVENT)<br>
	define Notify_FanselectorDay notify (Mythz.p07FanStageDay.*) setstate FanSelectorDay $EVTPART1<br>		define Notify_FanselectorDay notify (Mythz.p07FanStageDay.*) setstate FanSelectorDay $EVTPART1<br>
	attr FanSelectorDay room heatpump<br><br>		attr FanSelectorDay room heatpump</code><br><br>
	[[File:fanselectorv2.png\|thumb]]		[[File:fanselectorv2.png\|thumb]]
	define FanSelectorNight dummy<br>		<code>define FanSelectorNight dummy<br>
	attr FanSelectorNight group THZ<br>		attr FanSelectorNight group THZ<br>
	attr FanSelectorNight setList 0 1 2 3 offFor60min<br>		attr FanSelectorNight setList 0 1 2 3 offFor60min<br>

Micomat am 4. März 2015 um 12:25 Uhr

2015-03-04T12:25:20Z

← Nächstältere Version		Version vom 4. März 2015, 14:25 Uhr
Zeile 10:		Zeile 10:
	}}German version: [[Tecalor THZ Wärmepumpe]]		}}German version: [[Tecalor THZ Wärmepumpe]]

	This article describes how to connect to a Stiebel Eltron / Tecalor THZ/LWZ 303/304/404 heatpump and to read and write settings from and to the heating.		This article describes how to connect to a Stiebel Eltron / Tecalor THZ/LWZ 303/304/403/404 heatpump and to read and write settings from and to the heating. 504 not tested yet but may also work.

	For better understanding: Tecalor is the end customer brand of Stiebel Eltron. In the following the system will be called "THZ"		For better understanding: Tecalor is the end customer brand of Stiebel Eltron. In the following the system will be called "THZ"

	Tested are Software Versions 4.09, 4.19, 4.39 and 5.39.		Tested are Software Versions 2.06, 4.09, 4.19, 4.39 and 5.39.
	Older versions may work but there's no guarantee for.		Older versions may work but there's no guarantee for.
	NOTE: This manual is for persons who are familiar with electronics.		NOTE: This manual is for persons who are familiar with electronics.

Micomat: /* Release History */

2015-03-04T12:23:54Z

Release History

← Nächstältere Version		Version vom 4. März 2015, 14:23 Uhr
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	* bug fix for long messages in combination with serial cable connection		* bug fix for long messages in combination with serial cable connection
			'''v0.110'''

			* bugfix for interface (with serial cable) trunkating messages (forum 209294)

			'''v.0111'''

			* P21,22,23,24,25,29 added

			'''v0.112'''

			* bugfix for error caused by DevIo.pm 6980 status disconnected msg223569

			'''v0.113'''

			* support for older heatpumps

			'''v0.114'''

			* support for older heatpumps

			'''v0.115'''

			* implemented the "Informationen aus dem Modul des HeatpumpMonitors von Robert Penz". All non identified parts will receive value "n.a."

			'''v0.116'''

			* support for older heatpumps

			'''v0.118'''

			* faultcode implemented.
			* Typo fix: evuRelease

			'''v0.119'''
			* the firmware parameter 2.06 increases the countmax of the repetition of DevIo_SimpleReadWithTimeout from 24 to 50
			* decrease of the DevIo_SimpleReadWithTimeout from 0.06 to 0.02
			* the firmware parameter 2.06 removes registers not supported from older heatpumps

			'''v0.120'''

			* delays between the programming of programXXX_YY.

			'''v0.121'''

			* register interpretation from user godmorgon implemented
			* register 17 for old firmwares implemented

			'''v0.122'''

			* pXX register for old firmware implemented
			* max repeat increased limited to 60, before was 50
			* actualPower_Qc: patched to avoid buffer overflow

			'''v0.123'''

			* actualPower_Qc and actualPower_pEl fixed

			'''v0.124'''

			* history register pathed for firmware version 2.06

			'''v.0125'''

			* Adjustments to support Firmware 2.06

			'''v.0126'''

			* Further Adjustments to support Firmware 2.06

			'''v0.127'''

			* Bugfix:difference in the parsing rule for FCtime

			'''v0.128'''

			* now most of parameters can be read from old firmwares

			'''v0.129'''

			* sDisplay (Activity parameters symbolized in Display)

			'''v0.130'''

			* 2 bugfixes
			* firmware-id contains new features e.g. HW: 74 SW: 2.08 Date: MAR 9 2011
			* new parameter p99RoomThermCorrection implemented
			* THZ_PrintcurveSVG is now influenced by p99RoomThermCorrection

			'''v0.131'''

			* added p35PasteurisationInterval,p35PasteurisationTemp, p34BoosterDHWTempAct, p99DHWmaxFlowTemp, p89DHWeco

			'''v0.132'''

			* added p99startUnschedVent
			* splitting of big register implemented; this is needed for writing in old 2.06 firmware.
			* vertical range in the heating curve changed to 15..35°C

			'''v0.133'''

			* p12 FanStageManual
			* autoscale of heating curve

			'''v0.133+'''

			* fixed: According the manual our p99RoomThermCorrection is actually P76

	= Beispielkonfiguration =		= Beispielkonfiguration =

Krikan: Infobox Modul eingebunden

2014-12-25T16:56:45Z

Infobox Modul eingebunden

← Nächstältere Version		Version vom 25. Dezember 2014, 18:56 Uhr
Zeile 1:		Zeile 1:
	German version: [[Tecalor THZ Wärmepumpe]]		{{Infobox Modul
			\|Name=THZ
			\|ModPurpose=Connect to Tecalor heatpump
			\|ModType=d
			<!-- \|ModCategory= (noch?) nicht verwendet -->
			\|ModCmdRef=THZ
			\|ModForumArea=Sonstiges
			\|ModTechName=00_THZ.pm
			\|ModOwner=immiimmi
			}}German version: [[Tecalor THZ Wärmepumpe]]

	This article describes how to connect to a Stiebel Eltron / Tecalor THZ/LWZ 303/304/404 heatpump and to read and write settings from and to the heating.		This article describes how to connect to a Stiebel Eltron / Tecalor THZ/LWZ 303/304/404 heatpump and to read and write settings from and to the heating.