ElmoMC SimplIQ Digital Servo Drives-Bell Installation Guide - Manual (Page 39)

Bell Installation Guide Installation
MAN-BELIG (Ver. 1.302
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39
Table of Contents
3.12. Communications
The communication interface may differ according to the user’s hardware. The Bell can
communicate using the following options:
• RS-232, full duplex
• CAN
RS-232 communication requires a standard, commercial 3-core null-modem cable connected from
the Bell to a serial interface on the PC. The interface is selected and set up in the Composer
software.
In order to benefit from CAN communication, the user must have an understanding of the basic
programming and timing issues of a CAN network.
For ease of setup and diagnostics of CAN communication, RS-232 and CAN can be used
simultaneously.
3.12.1. RS-232 Communication
Note: 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 Signal Function Pin Location
J1/1 RS232_Rx RS-232 receive
J1/2 RS232_Tx RS-232 transmit
J1/3 RS232_COMRET Communication return
Table 9: RS-232 Pin Assignments