Q68ADI Analog Programming

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I have a Q68ADI module already installed by the machine manufacturer and they are using channels 1,2 & 3. I installed a Keyence IL-600 laser measurement sensor and have wired in the analog wires of the sensor to channel 4 of the card, sensor is set to 4-20Ma. I am just having a bit a difficulty programming this and seeing the analog values change on the PLC. Attached are some pictures of the programming of the other channels. Just trying to understand how to write the ladder correctly. What is the function of "H"? From reading the manual i did not see this in there but i do think i need to write in a "TO" & "FROM" statement.

Any help is appreciated.

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firstly you should activate the 4th channel you through intelligent function module then write your To From program instructions  

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