52 • Fieldbus Coupler 750-337, 750-338
Hardware
WAGO-I/O-SYSTEM
750
CANopen
3.1.2.8 Setting the Baud Rate
The bus coupler supports 9 different Baud rates. DIP switches are used to set
the baud rate.
The bus coupler changes to the configuration mode using the set module ID =
0 (all DIP switches off) with subsequent power On. The current set baud rate
is displayed in this status (starting from Firmware WT). The baud rate display
is shown by the top LED group (STOP, RUN, Tx-, Rx-Overflow), whereby
STOP = Switch 1,
RUN = Switch 2, Tx-Overflow = Switch 3 and Rx-Overflow = Switch 4. The
current set baud rate is displayed by the corresponding LEDs blinking slowly.
Now the new baud rate can be set using the DIP switch, by turning the corre-
sponding DIP switches to 'ON'.
The set configuration is saved by turning DIP8 to 'ON'. Following saving, the
new baud rate is displayed by the corresponding LEDs having a steady light.
Except for the baud rate of 1MBaud, this is displayed by all 4 LEDs blink-
ing/being lit.
Example:
125 kB: Tx-Overflow LED blink / are lit
250 kB: STOP and RUN LED blink / are lit
12
34
5
ON
67
8
Fig. 3-8: Example: Saving the baud rate 125 kB
g012441x
In this status no data exchange via CAN is possible.
DIP
Function
1
Mbit
800
kB
500
kB
250
kB
125
kB
100
kB
50
kB
20
kB
10
kB
is displayed
by LED
1
(LSB)
Baud
rate
0 1 0 1 0 1 0 1 0 STOP
2
Baud
rate
0 0 1 1 0 0 1 1 0 RUN
3
Baud
rate
0 0 0 0 1 1 1 1 0 Tx-
Overflow
4
(MSB)
Baud
rate
0 0 0 0 0 0 0 0 1 Rx-
Overflow
5
6
7
8 Accept-
ance
´off´ -> ´on´ : Accepting the configuration settings
Once the baud rate setting / baud rate check is completed, switch off the oper-
ating voltage knowing that only the DIP value will be used to calculate the IDs
which has been set during power ON. When switched off, the desired module
ID (=1 as delivered) can be set on the DIP.
Default baud rate: 125 kB