SOMMER SPA-2, Руководство пользователя

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Value Description
9999.998
Initial value: No measurement has been performed yet (position of
decimal character is irrelevant).
9999.997 Conversion error: Caused by a technical problem (position of decimal char-
acter is irrelevant)
9999999
Positive overflow
-9999999
Negative overflow
Table 7: Exception values
11.3 RS-485
11.3.1 What is it?
RS-485 is a serial communication method for computers and devices. It is currently a widely used
communication interface in data acquisition and control applications where multiple nodes com-
municate with each other.
1
11.3.2 What can I do with it?
RS-485 communication is primarily used to trigger measurements and read their results. It also per-
mits to change parameters of the SPA-2.
11.3.3 How do I wire it?
The SPA-2 can be connected to a data logger or a RS-485 network according to the figure below.
1
https://www.lammertbies.nl/comm/info/RS-485.html
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