Messtechnik Sachs Irinos IR, Руководство пользователя

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Irinos IR Users Manual © 2015 - 2016 Messtechnik Sachs GmbH, Germany
Measurement / Control via MscDll
Boxes. In reality, there are no long interruptions between the Irinos-
System and the PC. However, depending on the parametrization,
the PC can even pause for a few hundred milliseconds without
having any data loss.
The data exchange between the PC and the Irinos-System is
controlled by the MscDll automatically. The only thing the application
needs to do, is a one-time parametrization before connecting to the
Irinos-System.
Data exchange is always started by the PC. A request message
frame is send to the Irinos-System by the MscDll. Afterwards it
waits until a response message frame has been received. The Irinos-
System never sends data without a request. This cycle is started in
cyclic intervals, defined by the "send-period".
Timeouts are used to supervise any packet loss. If a packet gets
lost, the data transfer is restarted after that timeout. Only if multiple
retransmissions fail, the communication is regarded as broken.
A message frame can contain different types of data, e.g.
measurement values, Bit I/Os and hardware status (see figure
below). Packing and unpacking that data is done by the MscDll. The
application is neither able nor required to influence this.