+- Logic Machine Forum (https://forum.logicmachine.net)
+-- Forum: LogicMachine eco-system (https://forum.logicmachine.net/forumdisplay.php?fid=1)
+--- Forum: Gateway (https://forum.logicmachine.net/forumdisplay.php?fid=10)
+--- Thread: Turck modbus communication (/showthread.php?tid=2767)
Turck modbus communication - CristianAgata - 31.07.2020
Hi everyone, I'm trying to communicate with a Turck gateway, I have write a simple resident script to ask cyclical a value of the power supply, it works for a n numbers of request then the Turck passes me 'nill'
Any suggest?
Best regards
This is my script
if not mb then
require('luamodbus')
mb = luamodbus.tcp()
mb:open('192.168.0.162', 502)
mb:connect()
log('stato modebus ', mb)
end
-- loop while condition is met
while (1) do
-- read from address 1000
value = mb:readinputregisters(9216)
log('valore di value',value)
-- wait for 1.5 seconds
os.sleep(5.5)
end
RE: Turck modbus communication - admin - 01.08.2020
As suggested earlier you should use a profile instead of a script.
Here's a script that handles disconnect correctly. Make sure that script sleep time is larger than 0.
Code:
if not mb then
require('luamodbus')
mb = luamodbus.tcp()
mb:open('192.168.0.162', 502)
res = mb:connect()
log('stato modebus', res)
end
if mb then
value = mb:readinputregisters(9216)
log('valore di value', value)
if not value then
mb:close()
mb = nil
end
endRE: Turck modbus communication - CristianAgata - 01.08.2020
Thank you so much. Now I've created the json file and it works fine.... Sorry but I'm new in the modbus world.