Modbus communication error

[Mirco]

Hi,
is there a way to set an address group to 1 if there is an error with the modbus communication?
I use the RTU Modbus communication with profiles.

Thanks

[admin]

We have plans to add a status object, but it will work the other way round: 0 = missing, 1 = present/ok. As a work-around you can try monitoring one of the mapped objects last update time to check for failed communication. But this might not work if register value is not changing very often.

[Mirco]

Thanks!
How can I check the last update time of an object with script or javascript?

[admin]

This is how you can delta time in seconds between now and last object update:

Code:

obj = grp.find('1/1/1')
delta = os.time() - obj.updatetime
log(delta)

[Mirco]

Thank you!

[automatikas]

missed the post. It does work fine.

i used for loop as i have 36 devices

Code:

offline_time = 600 --offline detection time in seconds

-- for i = START, STOP, STEP
for i = 1, 36, 1 do
 address = ('13/1/'..i)
 obj = grp.find(address)
 delta = os.time() - obj.updatetime
 address = ('13/0/'..i)
 if (delta > offline_time) then
   grp.update(address, false)
 else
   grp.update(address, true)
 end
end

[Mirco]

We have plans to add a status object, but it will work the other way round: 0 = missing, 1 = present/ok. As a work-around you can try monitoring one of the mapped objects last update time to check for failed communication. But this might not work if register value is not changing very often.

Any news about the status object for modbus communication?

[admin]

Maybe for the next major version, not sure at the moment