servers/servertcp_handler.js
function _handleMEI(requestBuffer, vector, unitID, callback) {
    var MEIType = requestBuffer[2];
    switch(parseInt(MEIType)) {
        case 14:
            _handleReadDeviceIdentification(requestBuffer, vector, unitID, callback);
            break;
        default:
            callback({ modbusErrorCode: 0x01 }); // illegal MEI type
    }
}
function _handleMEI(requestBuffer, vector, unitID, callback) {
    var MEIType = requestBuffer[2];
    switch(parseInt(MEIType)) {
        case 14:
            _handleReadDeviceIdentification(requestBuffer, vector, unitID, callback);
            break;
        default:
            callback({ modbusErrorCode: 0x01 }); // illegal MEI type
    }
}
function _handleMEI ( requestBuffer , vector , unitID , callback ) { var MEIType = requestBuffer [ 2 ] ; switch ( parseInt ( MEIType ) ) { case 14 : _handleReadDeviceIdentification ( requestBuffer , vector , unitID , callback ) ; break ; default : callback ( { modbusErrorCode : 0x01 } ) ; // illegal MEI type } }
Function to handle FC43 request.

@param requestBuffer - request Buffer from client
@param vector - vector of functions for read and write
@param unitID - Id of the requesting unit
@param {function} callback - callback to be invoked passing {Buffer} response
@returns undefined
@private
Function to handle FC43 request .