Installed in 1997 - Unless there have been upgrades, it is an Ibex control system, with some revision of Ibex for Windows as the user interface on the PC. That system is actually quite robust. ENSURE YOU HAVE A BACKUP OF THE PC. If you have a current backup and the PC dies, you can restore it on another PC (will likely require some help from the dealer) in a matter of hours. Systems of this vintage do not require the PC to run the building, so the building will carry on smartly without the PC, you will just be blind to it. Be aware that the license for your software ( no longer available ) is a plug in dongle on the back of the machine. Probably plugged into the parallel port. DO NOT LOSE THIS as Ebay or a dealer installed upgrade is the only fix if you lose that key.
I would suggest that you attend factory training, but I think the system is actually too old - they don't offer it anymore. It might be advantageous to have the dealer send a HIGHLY QUALIFIED SENIOR GUY (don't let them send just any tech, amke 'erm send someone that has installed Ibex systems, and still works with them regularly.) to give your entire crew a refresher training on how to run the system.
Good Luck!