Programming With Simpl™ Windows - Crestron CNXCOM-2 Operation Manual

Programming with SIMPL™ Windows
4 CNX RS-232/422/485 Expansion Card: CNXCOM-2
CRESTRON
A common application is to use a three-wire null modem serial cable to
communicate with a PC, shown below. Since the pinout on the CNXCOM-2 is non-
standard, the card should not be plugged into the PC directly. The pinout in this
illustration emulates the IBM PC AT connector except for the RS-422 signals on
pins 1, 4, 6, and 9.
Three-Wire Null Modem Serial Cable
RXD 2
TO
TXD 3
CNXCOM-2
GND 5
9-PIN FEMALE
"D" CONNECTOR
NOTE: To support RS-485, tie pin 1 (RXD-) to pin 9 (TXD-) and pin 4 (TXD+) to
pin 6 (RXD+) in the cable (refer to the table after this note).
COM Pinout to RS-485 Bus
COM (DB9) CONNECTOR
Tie Pins 1 & 9
Tie Pins 4 & 6
Pin 5
SIMPL (Symbol Intensive Master Programming Language) is an easy-to-use
programming language that is completely integrated and compatible with all
Crestron system hardware. The objects that are used in SIMPL are called symbols.
SIMPL Windows offers drag and drop functionality in a familiar Windows®
environment.
SIMPL Windows is Crestron Electronics' software for programming Crestron
control systems. It provides a well-designed graphical environment with a number
of workspaces (i.e., windows) in which a programmer can select, configure,
program, test, and monitor a Crestron control system.
The next two subsections describe a sample SIMPL Windows program that utilizes
the CNXCOM-2. The first subsection details how the sample program works with a
textual description and block diagram. The second subsection provides a broad
description of how to actually create the SIMPL Windows program.
NOTE: The following description assumes that the reader has knowledge of
SIMPL Windows. If not, please refer to the extensive help information provided
with the software.
NOTE: There is no need to recreate the sample SIMPL Windows program. A copy
of this program is available from Crestron's ControlCD (version 4.03 and later).
Search for the CNXCOM-2.SMW project in the SIMPL Windows Example Base.
RED
3 TXD
WHITE
2 RXD
BLACK
5 GND
9-PIN FEMALE
"D" CONNECTOR
RS-485 BUS
+
-
G
Operations Guide - DOC. 8123
TO
SERIAL
DEVICE