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The SAGA Light Source is a synchrotron radiation facility consisting of a 255 MeV injector linac and a 1.4 GeV electron storage ring. Three insertion devices: a superconducting wiggler, an APPLE-II undulator, and a planar undulator, are used for synchrotron radiation experiments. For the demand of hard x-ray experiment, we are planning to install a second superconducting wiggler in the electron storage ring. We are developing the control system for the next superconducting wiggler using conventional PLCs and PCs. To compensate the closed orbit distortion, tune shift and chromaticity change induced by the excitation of the superconducting wiggler, the control system of dipole, quadrupole and sextupole magnets power supplies are also being upgraded. PLCs are linked by optical fiber cable to synchronize each power supplies. We present the control system of the superconducting wigglers and the compensation magnets using PLCs and PCs at this meeting.
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