Specifications
Crestron C2COM-3 2-Series RS-232/422/485 Expansion Card
The <rts> (request to send) input and the <cts> (clear to send) output are hardware
handshaking signals for use in applications where explicit handshaking control is
required. These signals are enabled only when the Handshaking setting of the device
is set to None in Configuration Manager.
Some serial driver symbols go beyond the basic serial drivers and have the added
capability to function as Serial I/O symbols. That is, in addition to the signals just
described, these symbols have an <enable> input, <str> and <delimiter>
parameters, and digital inputs and outputs. Together with <tx$> and <rx$>, these
signals function identically to a Serial I/O symbol, except that the positions of the
input and output signals are reversed.
For more information, refer to the latest release of the SIMPL Windows help.
Example Program
An example program for the C2COM-3 is available from the Crestron FTP site
(www.ftp.crestron.com
). Select the Examples folder and search for
C2COM-3.SMW.
Problem Solving
Troubleshooting
The table below provides corrective action for possible trouble situations. If further
assistance is required, please contact a Crestron customer service representative.
C2COM-3 Toubleshooting
TROUBLE POSSIBLE CAUSE(S) CORRECTIVE ACTION
C2COM-3 does
not function.
Control System is not
receiving power.
Verify power to Control System.
Circuit card is not properly
seated in slot.
Verify C2COM-3 is properly inserted into
Control System slot per procedures in this
Operations Guide.
Cable from C2COM-3 to
controlled equipment is
incorrect.
Verify wiring. Connect only the required pins
for each communication type (refer to page
4). Check Crestron cable database. The
latest version is in the Downloads | Software
Update section of the Crestron website
(www.crestron.com).
Incorrect serial port
settings.
Verify the communication parameters
assigned in the "Device Settings" window as
described in the Programming section.
Programming error. Check SIMPL Windows program.
Framing Error or
Parity Error
Cable noise* or improper
comm settings in program.
Verify comm settings (Serial Settings tab)
and wiring.
Overrun Error or
RX Buffer Full
C2COM-3 is receiving data
at a higher rate than
program can process.
Enable Hardware or Software handshaking
in comm settings (Serial Settings tab) and in
device.
TX Buffer Full C2COM-3 is sending large
quantities of data in excess
of the device baud rate or
handshaking is enabled and
the receiving end is
preventing the system from
transmitting.
Change program to reduce serial data to
device or use a higher baud rate if device
can support the higher rate.
*Cable noise can be caused by high frequency interference, etc.
Operations & Installation Guide - Doc. 8176 2-Series RS-232/422/485 Expansion Card: C2COM-3 • 9