Otake, Y. Kakihara, K. Nakahara, K. Ogawa, Y. Ohsawa, S. Shidara, T. Yokota, M. JACoW Publishing Geneva, Switzerland 2226-0358 978-3-95450-254-7 10.18429/JACoW-ICALEPCS1991-S11LLC02 English 378-381 controls linac electron gun software Contribution to a conference proceedings 1992 1992-12 https://doi.org/10.18429/JACoW-ICALEPCS1991-S11LLC02 https://jacow.org/icalepcs1991/papers/s11llc02.pdf Device controllers for electron guns and slits using an industrial personal computer have been designed and installed in the Photon Factory 2.5-Ge V Electron Linac at KEK. The design concept of the controllers is to realize a reliable system and good productivity of hardware and software by using an industrial personal computer and a programmable sequence controller. The device controllers have been working reliably for several years.