4 | Start-up
FISCHER Mess- und Regeltechnik GmbH
16/28
BA_EN_DE80
4.3.2.2 Interface
1 2 3
ON
ON=1
OFF=0
4 5 6 7
S1 S2 S3
2
0
2
1
2
2
Binary
0
0
0
1
0
0
0
1
0
Decimal 1
2
4
+
+
Baud rate
7
Σ
=
0
1
2
1
1
0
3
0
0
1
1
0
1
4
5
0
1
1
6
1
1
1
7
2400
4800
9600
14400
19200
38400
57600
115200
1 2 3
ON
4 5
6 7
S4 S5
0
0
1
0
0
1
Parity
without
even
uneven
1 2 3
ON
6
5
7
S6
0
1
Stop bit
1 Bit
2 Bits
S8
1
1
1
1
1
1
1
1
S8
1
1
1
S8
1
1
S7
0
1
Byte order
MSB ... LSB
LSB ... MSB
S8
1
1
1 2 3
ON
8
7
6
7
4
8
8
8
8
Fig. 18:
Configuring the interface
4.3.2.3 Description of functions
DIP switches
The Modbus is configured with the DIP switch.
There are two settings areas. They are divided into interface and address con-
figurations. Switch S8 allows you to switch between the two setting areas.
As soon as the BUS configuration is changed using the DIP switches, an in-
formation window appears on the display (if available) with the currently set
BUS configuration.
For complete configuration, the following procedure is recommended:
• First switch on the device and then set all DIP switches to the OFF position.
Now use S1 to S7 to select the desired MODBUS address.
• Next, set switch S8 to ON. Now you can configure the baud rate, parity,
number of stop bits and byte order.
• Moving each switch results in a configuration change. The configuration is
saved after each change. If the operator changes the switch position while
the device is switched off, this does not change the bus parameters.
