RabbitCore eDisplay OP7200, User Manual

Page: 42 / 174

36 eDisplay (OP7200)
3.5.3 RabbitNet Port
The RJ-45 jack labeled RabbitNet is a serial I/O expansion port for use with RabbitNet
I/O cards. The RabbitNet jack does not support Ethernet connections. There is also no
provision for the OP7200 to supply power to any RabbitNet peripheral cards.
When you are using the OP7200 in a RabbitNet network, Serial Port B is configured as a
clocked serial port and the RS-485 chip drives the RabbitNet port—the OP7200 then
cannot be used for RS-485 serial communication.
If you are planning to use any of the RS-232 serial ports and the RabbitNet port on the
OP7200, initialize the serial port(s) before you initialize the RabbitNet port. Section 4.5.4
provides some sample code to illustrates the sequence.
In principle, the OP7200 can operate either as a master controller with RabbitNet expan-
sion I/O, or it can operate as a slave operator interface in a RabbitNet network. Jumper
settings on header JP10 are used to configure the OP7200 for master or slave operation as
shown in Appendix A.3, “Jumper Configurations.” The factory default is for the OP7200
to be configured as a RabbitNet master.
At the present time, Dynamic C does not support the operation of the OP7200 as a slave,
and so the OP7200 is restricted to being used as a master.
Appendix D provides additional information about the RabbitNet system.