Installation guide

Hornet and Bee Installation Guide Installation
MAN-HRBEIG (Ver. 1.3)
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3.12. Communications
The communication interface may differ according to the user’s hardware. The Hornet and Bee
can communicate using the following options:
a. RS-232, full duplex
b. CANopen
RS-232 communication requires a standard, commercial 3-core null-modem cable connected
from the Hornet or Bee to a serial interface on the PC. The interface is selected and set up in
the Composer software.
In order to benefit from CANopen communication, the user must have an understanding of the
basic programming and timing issues of a CANopen network.
For ease of setup and diagnostics of CAN communication, RS-232 and CANopen can be used
simultaneously.
3.12.1. RS-232 Communication
Notes for connecting the RS-232 communication cable:
• Connect the shield to the ground of the host (PC). Usually, this connection is soldered
internally inside the connector at the PC end. You can use the drain wire to facilitate
connection.
• The RS-232 communication port is non-isolated.
• Ensure that the shield of the cable is connected to the shield of the connector used for
RS-232 communications. The drain wire can be used to facilitate the connection.
Pin (J1) Signal Function Pin Location
1 RS232_Rx RS-232 receive
2 RS232_Tx RS-232 transmit
3 RS232_COMRET Communication return
Table 11: RS-232 Pin Assignments