Jetter JVM-407B-HMI, Руководство пользователя

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214 Jetter AG
10 Programming
10.5 Monitoring interface activities
Several servers for variables have been integrated into the HMI to make
variables used within the HMI accessible from outside. These servers support
several protocols on different interfaces. The servers do not require any
programming in the application program, but process requests from external
clients on their own.
This chapter explains one possibility for detecting from within the application
program whether communication with the servers takes place through these
interfaces.
The following interface activities can be monitored:
 JetIP server via Ethernet interface

STX debug server via Ethernet interface
The monitoring function for interface activities is used, amongst others, for the
following scenarios:
 Plants requiring process visualization to ensure safe operation. They can
be transferred into a save state if communications fails.
 When the service technician connects an HMI, the application program
automatically displays additional status information.
Topic Page
Operating principle ...................................................................................... 215
Programming .............................................................................................. 217
Introduction
Monitored interface
activities
Purpose
Contents