I have a number of FM1120 Code Ver. 01 23 13 units in use that do not send back Supply Voltage i/o 66 because when originally configured this was not needed. It is easy enough to switch it on again with the configuration program, but several I can only get to by SMS or GPRS.
I have tried to switch this i/o on by sending ‘setparam 1260 1’ but with no success, so clearly there is more to it than that. Sadly the manual does not give an example message for me to see what I am not understanding.
Please could someone who has switch i/o on remotely by SMS advise me?
