By Topic

Vacuum-pump control system using programmable logic controllers on the TCP/IP network for the 2.5-GeV storage ring

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$33 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

3 Author(s)
N. Kanaya ; Photon Factory, High Energy Accel. Res. Organ., Tsukuba, Japan ; S. Asaoka ; H. Maezawa

A vacuum-pump control system has been developed using programmable-logic controllers (PLC) for the 2.5-GeV storage ring at the Photon Factory, High Energy Accelerator Research Organization (KEK). There are sixty-six Ti-getter vacuum pumps at the storage ring. Evacuation of gases in the storage ring is done by controlling the current in the titanium filaments in the vacuum pump (max 50 A). A PLC has a TCP/IP network port, 16-bit-digital output ports connected to sixteen solid-state relays (SSR) for current control. The PLC can simultaneously control up to sixteen pumps. These vacuum pumps are connected to SSRs which chop the AC current so as to control the current in the pumps. To operate the pumps, the pump current must have a trapezoidal-shaped current form. The PLC is configured so that the current in the pumps has a trapezoidal form associated with pre-heating, evacuation, and cooling-down phases of the pump. PLCs are connected to a personal computer (PC) through the network. The PC can automatically control the PLCs by sending a set of commands through the TCP/IP network. The commands specify the duration of the current form. Upon receiving a command from a PC running under WindowsNT through the network, the PLC generates pulse-trains through the digital output ports to trigger the SSRs in association with the operating phases. The design of the vacuum-pump control system is discussed

Published in:

Particle Accelerator Conference, 1999. Proceedings of the 1999  (Volume:2 )

Date of Conference: