Universal Modbus TCP/RTU Slave

[imprashant]

Hi, I have done the changes in the mbslave (user library script). But still I didn't understand how will I disable one Zone to communicate with the SCADA  over modbus rtu. Do I need to make some changes in resident script as well. Please guide.

Previously the script I was using was working but sometimes I have to send command 2-3 times from Modscan in order to execute command in LM5. The script I was using:

local mb = require('user.mbslave')
local mbrtu = require('luamodbus').rtu()

mbrtu:open('/dev/RS485-1', 9600, 'N', 8, 1, 'H')
mbrtu:connect()
mbrtu:setslave('*') -- Accept multiple RTU slave IDs

mb.setswap('w')
mb.setfloat16precision(2)

local ga1 = '0/0/11' --zone 1 enable/disable
local ga2 = '0/0/12' --zone 2 enable/disable
local current_mapping = nil

-- Predefine mappings for easy reuse
local mapping1 = {
    [1] = {
        coils = {
            [0] = '0/0/1',
        },
        registers = {
            [0] = '0/0/2',
        }
    }
}

local mapping2 = {
    [1] = {
        coils = {
            [1] = '0/0/3',
        },
        registers = {
            [1] = '0/0/4',
        }
    }
}

while true do
    local val1 = grp.getvalue(ga1)
    local val2 = grp.getvalue(ga2)

    if not val1 and current_mapping ~= "mapping1" then
        mb.setmapping(mapping1)
        current_mapping = "mapping1"
        log("Applied Mapping 1")
    elseif not val2 and current_mapping ~= "mapping2" then
        mb.setmapping(mapping2)
        current_mapping = "mapping2"
        log("Applied Mapping 2")
    end

    mb.rtuhandler(mbrtu)
    os.sleep(1) -- small delay to prevent CPU hogging
end