Prosoft-technology 5201-DFNT-104S User Manual Page 72

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104S v2 ProLinx Gateway IEC-60870-5-104 (104S) Protocol Implementation
(Firmware v2.xx) Protocol Manual
Page 72 of 157 ProSoft Technology, Inc.
3.5.2 STARTDT & STOPDT
STARTDT (Start Data Transfer) and STOPDT (Stop Data Transfer) are used by
the client to control the data transfer from the 104S v2 gateway. When the
connection is established, user data is not automatically enabled in the server
until it receives a STARTDT act request from the client. The server should
respond with a STARTDT con response to acknowledge the client request. Once
this procedure is concluded, the server can send monitor data to the client.
The client can interrupt the monitor data flow at any time sending a STOPDT act
command to the server.
In some circumstances the client unit may not support STARTDT and STOPDT
messages. The gateway may also be tested with simulator software that does
not support these features. During these situations, you may want to disable the
STARTDT and STOPDT features using the following parameter:
If this parameter is set to 1, the gateway will ignore the STARTDT and STOPDT
requests by the client unit.
March 19, 2010
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