read failed: Illegal data address

[sx3]

1-byte value comes from the example that you gave in another thread, that I tried to understand. I have no clue to be honest.
In this register there are 32 writable bits, some of them are reserved though.
https://forum.logicmachine.net/showthrea...24#pid6824

Bit 4 (bypass) and bit 5 (out of bypass) are exclusive as they both control the state of the UPS. I can only write true to one of them because it toggles between thoose states, either bypass or online.

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Am I in the ball park with this script? Setting bit 4 in 1536 to true.

Code:

require('luamodbus')
mb = luamodbus.tcp()
mb:open('192.168.1.228', 502)
mb:connect()
mb:setslave(11)

function setbit(value, nr)
 return bit.bor(value, bit.lshift(1, nr))
end

value = 1

value = setbit(value, 4)

mb:writeregisters(1536, value)

mb:close()


log(value) -- result: 17