Omron PROFIBUS DP GATEWAY Operation Manual page 35

Unit Components
Baud rate setting
Communication Format
Selection
Auxiliary Port Selection
20
Note Always turn OFF the power to the Unit before changing the device address
setting. The Unit only reads the address setting during the initialization follow-
ing a power-up, i.e. any changes after power up will have no effect.
In order to select the baud rate used for communication over the RS-422A/
RS-485 network, two DIP-switches are available. Baud rate switches are part
of the DIP-switch bank of 4 switches on the front-case of the Unit. Switch 1
and 2 are used to select the baud rate to be used for communication over the
RS-422A / RS-485 network. The possible combinations are summarized
below.
DIP switches
PRT1-SCU11
1 2 3
2 3
1
0
9
8 7
2 3
1
0
Note The two DIP-switches for the baud rate are only read during power-up/restart
of the PRT1-SCU11. Changing them during operation has no effect.
DIP-Switch 3 allows the user to select the communication protocol on the RS-
422A / RS-485 network, to be either Memobus or one of the other protocols.
DIP-
Switch 3
OFF Communication protocol on RS-422A / RS-485 is
• Compoway-F
• Host Link
• K-Format
Note Selection of the protocol is made through I/O module selection in
Note The communication format used is 7 data bits, 2 stop bits, 1 even
ON Communication protocol on RS-422A / RS-485 is Memobus.
Note The communication format used is 8 data bits, 1 stop bit, 1 even
Note The communication format selection must be set prior to power-up. Changes
made during operation have no effect.
DIP-Switch 4 allows the user to enable or disable the use of the RS-232C
Port, behind the cover next to the DIP-switches.
DIP-
Switch 4
OFF PROFIBUS to Compoway-F and Host Link is active. The RS-232C Auxil-
iary Port is inactive.
Communication from PROFIBUS is rerouted to the RS-485/RS-422A
communication port.
ON PROFIBUS to Compoway-F and Host Link is inactive. The RS-232C Aux-
iliary Port is active.
Communication from the Auxiliary Port is rerouted to the RS-485/RS-
422A communication port.
Note DIP-Switch 4 can be changed during operation. The selected mode is
reflected through the LED Indicators.
DIP-
Switch 1
OFF
ON RUN
4
ERR OFF
COMM
4
ON
5
6
BF
x10
x1
ON
4
FCOM
5
Description
the PROFIBUS Master configuration.
parity bit.
parity bit.
Description
Section 2-1
DIP- Baud rate
Switch 2
(bits/sec.)
OFF 9600 (default)
ON 19200
OFF 38400
ON Reserved for future use