The Titan 4 110 may stop communicating with your PC if left for some time, and this is because of the power saving settings on your PC.
The attached PDF document, which includes images and diagrams, explains how to adjust the power saving settings on your PC to maintain communication with the instrument.
WARNING: Any maintenance work undertaken on a James Heal instrument must be done so by a trained and competent person. Where electrical work is detailed, this should only be completed by a qualified engineer. James Heal is not responsible for damage or injury arising from work carried out by any person not qualified to do so. If in doubt, please contact James Heal or your local James Heal Agent.