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opc-ua_en

OPC-UA

The OPC-UA driver combines server and client functionalities in a single driver.

The name of this driver is: opcua
The routing address of the first OPC-UA driver is 1620
The data point file for the first OPC-UA driver is: opcua1.txt
The configuration file for the global settings of the first OPC-UA driver is: opcua1.cfg
The path for certificates is: ./opcua1/

For the OPC-UA driver as well as all other gateway drivers the data point definitions are as follows:

Type Description
M Integer value (binary data points, counters) which can/shall only be read by the gateway
S Integer value which can be either read or written by the gateway.
X Floating point value (with decimal place) which can/shall only be read by the gateway
Y Floating point value (with decimal place) which can be either read or written by the gateway.
A String is used e.g. in BACnet Trends and ESPA 4.4.4 data points

The OPC-UA addresses are defined as follows:

[<modifier> <system> <NodeId>; <specialType>]
[<modifier> <system> <<ns>;<Id>; <specialType>]
Description Value
modifier M, S, X, Y (Sets the OPC-UA AccessLevel for the datapoint/node)
system Directs the driver to act either as Server (Srv) or as Client (Cli)
NodeId Typical OPC-UA NodeId, terminated with a semicolon (';')
The Namespace (ns) is part of an NodeId. When it's omitted, the ns will point\\to Namepsace 0 (defined by http://opcfoundation.org/UA/).
This namespace includes predefined addresses of OPCFoundation. To avoid conflicts it is recommended to use ns=1 or ns=2!
ns=1 : Namespace-Index 1, already defined by opcua configuration parameter ApplicationUri
ns=2 : Namespace-Index 2, optional and needs to be defined by opcua configuration parameter Namespace

i=numeric (z.B.: ns=1;i=4711;)
s=string (z.B.: ns=1;s=current-time;)
g=guid (z.B.: ns=1;g=C496578A-0DFE-4b8f-870A-745238C6AEAE;)

Bytestring (b) is currently not supported.
specialType Optional: Reserved for special types like the Failure-Datapoint (failure) or the BadTime-Indication-Datapoint (badtime).

All special types are and should be read-only!


Format

The Format tells the driver about the datatype of the datapoint.
Possible values are:

Value Description
BIT Boolean true or false
SINT8 8 bit signed integer
UINT8 8 bit unsigned integer
SINT16 16 bit signed integer
UINT16 16 bit unsigned integer
SINT32 32 bit signed integer
UINT32 32 bit unsigned integer
SINT64 64 bit signed integer
UINT64 64 bit unsigned integer
FLOAT32 32 bit float
FLOAT64 64 bit float = double

Displayname

Sets the OPC-UA Displayname of the datapoint

Description

Sets the OPC-UA Description of the datapoint

Examples

[A Srv ns=1; i=9;]

  name = Timestamp   format = STRING

[M Cli i=4712;]
name = Client1 Datapoint (readonly) on namespace 0 index 4712
format = SINT16

[S Cli i=815;]
name = Client9 Datapoint (read-/writeable) on namespace 0 index 815
format = UINT16

[M Cli ns=1; i=4710; failure]
name = Cl1 Failure-Datapoint on namespace 1 index 4710
format = SINT32
 
[M Cli ns=1; s=FailureTime; badtime]
name = Client 1 Time-Failure-Datapoint on namespace 1 by name "FailureTime"
format = SINT32
 
[X Cli ns=2; s={Device,201};{BinaryInput,4016};PresentValue;]
name = Client-2 BI-4016
format = FLOAT64
 
[Y Srv ns=1; s=some_value;]
name = Server Datapoint (read-/writeable) on namespace 1 by name "some_value"
format = FLOAT32
ua_displayname = Server Datapoint 'some_value'
ua_description = another dp

[Y Srv ns=1;g=C496578A-0DFE-4b8f-870A-745238C6AEAE;]
name = Server Datapoint (read-/writeable) on namespace 1 by guid "C496578A-0DFE-4b8f-870A-745238C6AEAE"
format = FLOAT32

Driver-Configuration

Common Settings (Section: OPC_UA)

Param Default Type Range Description
PollInterval 3 int 0-255 Timevalue (1/100 second) to switch through the Communication-Systems (e.g. 1 Server + 2 Clients = 3 Communication-Systems)

Keep this value as low as possible for the use of a server!
CommandsPerStep 3 int 0-255 Defines the amount of commands to be executed within one poll.
e.g. 3 systems and 3 commands are resulting in maximum of 9 commands per cycle.
Keep it balanced with your communication systems
MaxRetries 3 int 0-255 Number of Retries. After exceeding the limit, a failure is set to the communication system!
IsClient 0 int 0-1 Sets the driver to server- or client-mode

Server Settings (Section: Server)

Param Default Type Range Description
Connection Interface LAN1 string Defines on which interface the server socket will listen.

Possible values are:
- LAN1 for eth0 only
- LAN2 for eth1 only
- all for no exclusive binding
PortNumber 4840 int 1-65534 Defines Port Number of Server
UserTokenType anonymous string - anonymous
- username („gw“ & „service“)
- certificate
SecurityMode 0 int 0-2 - 0 „None“
- 1 „Sign“
- 2 „Sign and Encrypt“
Encryption none string To use the encryption, the SecurityMode must not be 0 (None)
- „none“
- „RSA“
- „B256“
- „SHA“

(With encryption enabled, the ApplicationUri needs to match the URI from the certificate)
Certificate „“ string Certificate-File (e.g.: „/ugw/config/opcua1/server_cert.der“)
PrivateKey „“ string PrivateKey-File (e.g.: „/ugw/config/opcua1/server_key.der“
Namespaces ApplicationUri http://www.mbs-solutions.de/OPCUA/ uri Namespace 1
(With encryption enabled, the ApplicationUri needs to match the URI from the certificate)
Namespace „“ uri Namespace 2 (optional)
Discovery-Client RegisterServerAt uri Registers the OPC-UA server at Discovery-Server (e.g. opc.tcp://192.168.7.111:4840)
- Currently, only open62541-Servers are supported!
- A Server isn't able to self-register itself leads to a timeout
RegisterPeriod 600 int Re-Register frequency in seconds
RegisterDelay 500 int Delays the first registry up to x milliseconds
RegisterTimeout 2 int Register-Timeout in seconds

At this point the server is only supporting two users!

Username Password
service SERVICE
gw GATEWAY

Client Settings (Section: Client)

Param Default Type Range Description
Connection Timeout 5 int 0-4294967295 Response Timeout in seconds (5 seconds)
SecureChannelLifeTime 36000 int 0-4294967295 Secure Channel Lifetime in seconds (60 * 60 * 10 = 10 hours)
PollMode 0 int 0-1 Sets how the client recognize value changes:
- 0 for subscriptions
- 1 for polling
EndPointUrl opc.tcp://opcua-srv:4840 string ServerEndPoint for the Client
UserTokenType anonymous string - anonymous
- username
- certificate
SecurityMode 0 int 0-2 - 0 „None“
- 1 „Sign“
- 2 „Sign and Encrypt“
Encryption none string To use the encryption, the SecurityMode must not be 0 (None)
- „none“
- „RSA“
- „B256“
- „SHA“
Certificate „“ string Certificate-File (e.g.: „/ugw/config/opcua1/client_cert.der“
Privatekey „“ string PrivateKey-File (e.g.: „/ugw/config/opcua1/client_key.der“
Username „“ string username for login (or empty), mandatory if UserTokenType = username
Password „“ string password for login (or empty), mandatory if UserTokenType = username

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opc-ua_en.txt · Zuletzt geändert: 13.01.2022 19:55 von oni

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