ElmoMC SimplIQ Digital Servo Drives-Whistle Installation Guide - Manual (Page 46)

Whistle and Tweeter Installation Guide Installation
MAN-WHTWIG (Ver. 1.604)
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46
3.12. Communications
The communication interface may differ according to the user’s hardware. The Whistle and
Tweeter can communicate using the following options:
a. RS-232, full duplex
b. CAN
RS-232 communication requires a standard, commercial 3-core null-modem cable connected
from the Whistle or Tweeter 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
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 Locations
1 RS232_Rx RS-232 receive
2 RS232_Tx RS-232 transmit
3 RS232_COMRET Communication return
Table 11: RS-232 Pin Assignments