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Getting a Hunk #1-9 succeeded, and a few lines later (right after trace.c) a HUNK #1 failed during the patch. 

install and kernel activation does seem to complete if it’s ignored. 

Is the cylinder controlled by -10 volts advances and +10 volts retracted position 0 volts gradually descends
Note: I am using translate google sorry for any inconvenience

Thanks for the feedback, good suggestion, but since I'm very late on this project, physically installing a sensor will take more time and I don't know if the client will accept it on the next visit. Your idea helped me to try a different way, maybe never tried before in LinuxCNC, which would be to take the analog voltage reading from the inductive sensor that is present and already part of the original machine and create a logical ladder to compare the voltage from zero to 10V where 8.6 volts would be the virtual limit switch. With your experience, do you think it is possible to use an analog reading and determine certain thresholds to turn on and off a bit memory in the ladder and use it as a limit switch?

Found my issue. The internal encoder parameter is not getting set properly on the 7041's In my XML config file I have the encoder modparm set to false but when i open a terminal after axis has started up and check the parameter using "ethercat -p upload --type uint8 0x8012 0x08" it shows it as zero instead of 1. I suspect something in the driver code is not jiving with the revision of the modules i have. When I set the parameter manually after axis has opened up. The simulated encoder feedback is updated on the pins as it should be and all is well.