US 10,257,707 B2 · Method for safe access to a field device

Abstract

A method for providing safe access of a mobile control unit (1) to a field device (2), wherein, in particular, the field device is protected against unauthorized access via a mobile control unit is achieved in that a connection for transmitting data is established between the mobile control unit (1) and the field device (2), that access data for access is exchanged, that a comparison is made between the access data and stored comparison data and a comparison result is generated, and that access of the mobile control unit (1) to the field device (1) is permitted based on the comparison result.

Drawings

Drawings are temporarily unavailable. Open the PDF at USPTO

Drawings

Claims7

Dependent claims

Method for safe accessing of at least one field device by at least one mobile control unit, comprising:

establishing a connection for transmitting data at least between the mobile control unit and the field device,
transmitting access data for accessing of the mobile control unit to the field device, comparing the access data with stored comparison data and generating a comparison result,
permitting access of the mobile control unit to the field device based on the comparison result indicating that access is permissible,
wherein at least one access code is assigned to the field device for access to the field device and wherein the access code is stored as at least a part of the comparison data,
wherein an identification code is assigned to the mobile control unit and is transmitted to the field device as at least a part of the access data, and
wherein the identification code is stored in the field device as at least a part of the comparison data in the case that the comparison result generated for the comparison of the access data transmitted by the mobile control unit and the stored access code is positive and that in case of a further access of the field device by the mobile control unit only the identification code is transmitted from the mobile control unit to the field device.

3 more elements

Dependencies are inferred from the claim text.

Description4,591 words

Summary1,865 words

#Field of the Invention

#The invention relates to a method for safe access of at least one mobile control unit to at least one field device.

#Description of Related Art

Brief description of the drawings6 figures

#FIG. 1 is a schematic representation of access of a mobile control unit to a field device,

#FIG. 2 is a flow chart for a first embodiment of safe access of a mobile control unit to a field device,

#FIG. 3 is a flow chart for a second embodiment of safe access of a mobile control unit to a field device,

Detailed description2,605 words

#An example for safe access of a mobile control unit 1 to a field device 2 is represented in FIG. 1. The access, which can also be called authentication of the mobile control unit 1 for the field device 2, thereby takes place within a process system 3.

#Here, the field device 2 is a measuring device for determining the fill level of a medium 4 in a container 5.

#In the illustrated embodiment, measurement is carried out using the radar principle, wherein an antenna 6 is provided for sending and receiving electromagnetic radiation.

Facts

Application

15/302,625Filed 20 Mar 2015

Priority

DE 10 2014 105 0769 Apr 2014

Published

US 2017/0041796 A19 Feb 2017

Granted

9 Apr 2019

Term ends

20 Mar 2035

Estimated · how

20 years from earliest known nonprovisional domestic filing plus recorded patent term adjustment. Maintenance-fee lapses, terminal disclaimers and statutory extensions have not been checked. The continuity chain may be incomplete; this is not an enforceability determination.

Classification12 codes

H04W 12/08
Security arrangements; Authentication; Protecting privacy or anonymity: access security
G05B 11/01
Automatic controllers: electric
G05B 19/4185
Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible…:…
H04W 12/068
Authentication: using credential vaults, e.g. password manager applications or one time password [OTP] applications

Timeline

9 Apr 2014Priority claimedDE 10 2014 105 076
20 Mar 2015Application filedUS 15/302,625
23 Dec 2016Assigned to Krohne Messtechnik GmbHassignment of assignor's interest
9 Feb 2017PublishedUS 2017/0041796 A1
9 Apr 2019GrantedUS 10,257,707 B2
12 Oct 2026TodayWithin its term
20 Mar 2035Term endsEstimated

Method for safe access to a field device

Life of this patent

Method for safe access to a field device

Life of this patent

Life of this patent

Abstract

Drawings

Drawings

Claims7

Description4,591 words

Classification12 codes

Life of this patent

Drawings

Description4,591 words