Siemens BT 200 Manual page 12

English 04/00
4.2 Station (RS 485) Test
This test is used to test the RS 485 interface
of a single slave or master.
Performing the test
Disconnect bus connector from the station.
Establish point-to-point connection between
station and BT 200. See figure 4.
U
Only the included test cable may be used for
this connection.
Fig. 4 Point-to-point connection
Turn on the station since the test must be
performed with an active station. The master
must be in "RUN" mode.
Start station test.
Set address of the station to be tested as
shown below.
Test results
Possible test results are listed below.
RS 485 okay (slave okay)
-
RS 485 defective. (No continuous signal
-
receipt; repeat test.)
No response (nothing at all received)
-
5 V : (corresponding measured value)
-
RTS signal (YES or NO)
-
Page 12 (S)J31069-D0075-U001-A2-6318
BT 200
station