Title:
プラント制御システム
Document Type and Number:
Japanese Patent JP4807562
Kind Code:
B2
Abstract:
A plant control system includes at least one control apparatus, and an engineering apparatus for changing a security state of the control apparatus. The control apparatus includes: a security management part for accepting a security level change request downloaded from the engineering apparatus and changing a security level of the control apparatus by referring to a password held by the control apparatus; and a change permission part for permitting a change in the security level by the security management part.
Inventors:
Sako Sako
Application Number:
JP2005339836A
Publication Date:
November 02, 2011
Filing Date:
November 25, 2005
Export Citation:
Assignee:
Yokogawa Electric Corporation
International Classes:
G05B23/02; G05B9/02; G06F21/00; G06F21/60; G06F21/62
Domestic Patent References:
| JP2005301935A | ||||
| JP2005222464A | ||||
| JP2001243341A |