homeLYnk - Change value of groups adrs when a modbus device is disconnect

[sesa356649_brid]

Hello,

In homeLYnk, does the possibility exist to change the value of a group address when one of the connected modbus devices is unfortunately disconnected (after timeout) ?

Best regards,

[PetrMares]

Hello Jean-Luc,

You can read update time of some mapped registers to object (object must be update most of the time something dynamic ... as current, frequency etc.

following code gives you table with all information about object (register mapped to 0/0/1)

myobject = grp.find('0/0/1')

log(myobject)

* table: [data] * bool: false [export] * number: 0 [updatetime] * number: 1487837856 [id] * number: 1 [decoded] * bool: true [disablelog] * number: 1 [tagcache] * string: [datatype] * number: 1 [address] * string: 0/0/1 [datahex] * string: 00 [units] * string: [value] * bool: false [highpriolog] * number: 0 [comment] * string: [name] * string: string_change [pollinterval] * string:

Then you can read out once more (after time bigger than pooling time!) and compare update time. If numbers are different connection is ok. If the update time is the same then you have some problem with Modbus.

Petr

[David_Navratil · Accepted solution]

Hello Jean-Luc,

You can use attached Library with function checkrtu(slave address) and function checktcp(ip, port).

This return you result true or false .. status of Modbus device.

Regarding to result you can change values in Group objects with grp.write(address, value) or grp.update(address, value).

Functon grp.write write new value to KNX TP or IP line, function grp.update just update value internally and don't send value into KNX line.

NOTE: Library is binary coded, becouse it using database and database can be broken with wrong usage.

Lib: Libraries-ModbusCheck.tar.gz - Box

I hope it helps you.