Siemens OPC UA User manual
OPC UA for S7-1500 and S7-1200
Unrestricted © Siemens 2020 |
siemens.com/simatic-s7-opcua |
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OPC UA at a glance
OPC Foundation
•Founded 1996 (OPC Classic specification) ,OPC UA specification release 2009
•More than 450 members from all areas
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Siemens AG |
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Bosch Software Innovations GmbH |
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SAP AG |
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Fraunhofer IOSB |
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PHOENIX CONTACT |
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Cisco Systems |
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Yokogawa Electric Corporation |
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Unified Automation GmbH |
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HMS Industrial Networks |
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Bosch Rexroth AG |
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Emerson Process Management |
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Honeywell Inc |
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ProSoft Technology |
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Rockwell Automation |
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Softing Industrial |
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Endress+Hauser Process Solutions AG |
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Beckhoff Automation GmbH |
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Microsoft Corporation |
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FANUC CORPORATION |
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CERN |
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ABB Automation GmbH |
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IBM |
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Bundesamt für Sicherheit in der Informationstechnik (BSI) |
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Festo AG & Co. KG |
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ascolab GmbH |
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B&R |
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GE |
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Pilz GmbH & Co. KG |
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Unrestricted © Siemens 2020 |
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Schneider Electric |
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Hilscher Gesellschaft für Systemautomation mbH |
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Page 2 |
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OPC UA at a glance Cooperations
Unrestricted © Siemens 2020
Page 3
North-South Alignment
Strategic alignment of OPC UA and PROFINET
Cloud
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MES, ERP |
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| <![if ! IE]> <![endif]>North |
SCADA, DCS |
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OPC UA |
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V15.1
| <![if ! IE]> <![endif]>South |
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PROFINET |
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Unrestricted © Siemens 2020
Page 4
| <![if ! IE]> <![endif]>Ethernet |
<![if ! IE]> <![endif]>OPC UA |
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| <![if ! IE]> <![endif]>Industrial |
<![if ! IE]> <![endif]>PROFINET |
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Controller
Power supply and distribution
Manufacturing Execution System
SCADA- |
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Energy |
System |
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management |
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Engineering- |
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Framework |
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HMI |
IPC |
Industrial |
Motion |
CNC |
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Communication |
Control |
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Industrial |
Decentral IO |
Drives |
Industrial |
Identification |
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controllers |
OPC UA Data Access Client (SIMATIC S7-1500)
Customer use cases
Vertical Line Integration: e.g. MES, SCADA |
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Industry Standard Support |
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UA |
UA |
Server S7- |
Server S7- |
1500 |
1200 |
Machine |
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PLC |
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UA |
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Client |
Unrestricted © Siemens 2020
Page 5
UA
Client
Machine |
PLC |
Inbuilt server |
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interface |
Method |
building
Object
Companion Variable
Specifications
& Methods
Variable – Property
S7-1500 OPC UA Server
Browsing
Client
| <![if ! IE]> <![endif]>Browse Request |
<![if ! IE]> <![endif]>Browse Response |
Server
Browsing of
SPS-Data
Read/Write
Client
| <![if ! IE]> <![endif]>R/W Request |
<![if ! IE]> <![endif]>R/W Response |
Server
Acyclic access to data
S7-1500
S7-1200
S7-1500
S7-1200
*: Only for user modelled interfaces
Unrestricted © Siemens 2020
Page 6
Registered
Read/Write
Client
| <![if ! IE]> <![endif]>Registering Nodes |
<![if ! IE]> <![endif]>Node Handles |
<![if ! IE]> <![endif]>R/W Request |
<![if ! IE]> <![endif]>R/W Response |
Server
High performance with repeated acyclic access
Subscription
Client
Publishing
Sampling
Server
Load reduction for HMI / monitoring applications
S7-1500 |
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S7-1200 |
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S7-1500 |
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S7-1200 |
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Methods
Client
| <![if ! IE]> <![endif]>Call Request ( ) |
<![if ! IE]> <![endif]>Call Response ( ) |
Server
Consistent data transfer through function call (no handshakes)
Companion
Specifications
Client
Server
Information modeling
S7-1500 |
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S7-1200 |
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S7-1500 |
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S7-1200 |
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OPC UA Server for SIMATIC S7-1500 based CPUs
Functional scope
Browse
OPC UA server
Browse request
Node ID = 84 (root folder), BrowseDirection = forward
Browse response
Node ID, browse name, display name, node class, type def
Browse
• Browsing of PLC Data • Dynamic adaptation of the client configuration to the data provided by a server
Unrestricted © Siemens 2020
Page 7
OPC UA Server for SIMATIC S7-1500 based CPUs Functional scope
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Read |
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OPC UA |
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server |
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Read request |
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Node ID = "DB1"."myArray“ |
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1111 |
Read response |
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0000 |
Value = “11110000”, Timestamp = 10/29/2018 3:15pm, Status = Good |
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DB1.myArray |
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Data access
1111
0000
DB1.myArray
• Symbolic read access to PLC data
Unrestricted © Siemens 2020
Page 8
1111
1111
DB1.myArray
OPC UA Server for SIMATIC S7-1500 based CPUs Functional scope
OPC UA server
1111
1111
DB1.myArray
Data access
1111
11110000
DB1.myArray
Write
Write request
Node ID = "DB1"."myArray“, Value = “11111111”,
Write response
Status = Good
• Symbolic write access to PLC data
Unrestricted © Siemens 2020
Page 9
1111
1111
DB1.myArray
OPC UA Server for SIMATIC S7-1500 based CPUs Functional scope
OPC UA server
Node ID: "123456789“
Memory: 16# ABCD_01234
1111
0000
123456789
Data access
1111
0000
DB1.myArray
Registered Read
Register Node request Node ID = "DB1"."myArray“
Register Node response Node ID = “123456789"
Read request
Node ID = "123456789"
Read response
Value = “11110000”, Timestamp = 10/29/2018 3:15pm, Status = Good
Improved performance with repeated access
• Repeated access to PLC data
Unrestricted © Siemens 2020
Page 10
Node ID: "DB1". "myArray"
Node ID: "123456789" |
1111 |
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1111 |
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123456789 |
OPC UA Server for SIMATIC S7-1500 based CPUs Functional scope
OPC UA server
Sampling Queue
1111
11110000 DB1.myArray
Sampling 
1111
11110000 DB1.myArray
Subscribe
Subscribe request
Node ID = „DB1“.“myArray“, Publishing interval = 5s, Sampling interval = 1s
Publish request
Publish response
Publish response
Value = “111100001111”, Timestamp = 10/29/2018 3:15pm, Status = Good
Publishing
Load reduction for monitoring use cases (Compared to polling)
1111
11110000 DB1.myArray
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• Load reduction for monitoring use cases |
• Absoulte filters possible |
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Unrestricted © Siemens 2020
Page 11
*: Simplified illustration
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