US 12,422,811 B2
Control system, relay device, and access management program
Kotaro Okamura, Kyoto (JP); and Naoki Hirobe, Kyoto (JP)
Assigned to OMRON CORPORATION, Kyoto (JP)
Appl. No. 17/795,401
Filed by OMRON Corporation, Kyoto (JP)
PCT Filed Dec. 17, 2020, PCT No. PCT/JP2020/047253
§ 371(c)(1), (2) Date Jul. 26, 2022,
PCT Pub. No. WO2021/161653, PCT Pub. Date Aug. 19, 2021.
Claims priority of application No. 2020-020425 (JP), filed on Feb. 10, 2020.
Prior Publication US 2023/0093865 A1, Mar. 30, 2023
Int. Cl. G05B 19/05 (2006.01); G06F 21/62 (2013.01)
CPC G05B 19/058 (2013.01) [G06F 21/62 (2013.01); G05B 2219/1108 (2013.01); G05B 2219/14006 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A control system configured to control a control object, the control system comprising:
a control unit configured to control the control object and communicate with an external device through a plurality of ports; and
a relay unit configured to relay access from the external device to the control unit,
wherein the relay unit comprises:
a reception unit configured to receive an authentication request from a request source;
an authentication unit configured to authenticate validity of the request source upon receipt of the authentication request by the reception unit; and
an access management unit configured to control a restriction level of access from the external device to the control unit based on a port management list that defines a communication permitted state of each of the plurality of ports for each of a plurality of management modes of the control unit, when the validity of the request source is authenticated by the authentication unit, and
wherein the control unit is configured to communicate with the external device through at least one port permitted by the port management list of the plurality of ports according to a type of a management mode;
wherein the plurality of management modes include a development phase, an operation phase, and a maintenance phase;
wherein a number of ports permitted in the operation phase is smaller than a number of ports permitted in each of the development phase and the maintenance phase; and
wherein the access management unit is configured to control the restriction level of access from the external device to the control unit for the at least one port permitted by the port management list according to the type of the management mode.