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Supported device types and versions
Communication line conf=
iguration
Communication station configuration
I/O tag =
configuration
Literature
Changes and modifications
<=
a href=3D"/pages/viewpage.action?pageId=3D17279959#DDEClient-revizie">Docum=
ent revisions
Communication supports the DDE Client access using the XlTable= strong> data format (the format used by e.g. MS Excel, Wonderware Intouch I= /O Servers) or CF_TEXT data format.
Communication with the DDE Server requires a separate line. Accessing se= veral servers from one communication line is not possible.
Note: The user you want to impersonate must have&n= bsp;Log on as a batch Job system privileges.
Table 1
Keyword | Full name | Meaning | Unit | Default value |
---|---|---|---|---|
REQ
|
Request | If the value is Yes, after each writing a value,= a request for the reading of the value will be sent. | YES/NO | NO |
TYPE
|
Server Type | Type of the DDE server for communication:
|
COLD/WARM | WARM |
FORMAT
|
Data Format | The Data clipboard format to be used for data tr= ansmission. | XLTABLE/TEXT | XLTABLE |
TIMEOUT
|
Transaction Timeout | A timeout of the function DdeClientTransaction, = which determines the maximum amount of time (in milliseconds), that the DDE= client will wait for a response from the DDE server in the synchronous tra= nsaction. | ms | 1000 |
Possible types: Ai, Ao, Ci, Co, Di, Do, TxtI, TxtO.
The address is the DDE Cell name (a string containing up to 50 character= s).
Note: If the initialization of the connection to the se= rver, topic, or cell has failed, the attempt to connect is repeated in the = interval of 5 seconds. The same is true also when the connection is lost (s= erver shutdown etc.).
If the DDE server is installed on other PC within a local computer netwo= rk, you can establish a connection via the NetDDE interface. For such a con= nection the following rules apply:
It is possible using the MS Excel program. Run the MS Excel as the DDE s= erver using the switch /e e.g. from the command prompt - <= strong>excel.exe /e.
Complete access to a DDE cell is in the following format:
Excel|Sheet1!=E2=80=9DR1C1=E2=80=9D
Where:
This naming is valid only for English versions of MS Excel.
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Related pages: