Integrated Control System
Crestron
CNMSX
8. Select
Diagnostics | Check Operating System Version
(alternatively,
depress the
F5
key) from the Viewport. The Viewport may display a
window as it scans various baud rates. Eventually, a message should
appear in the
Incoming
section showing a version number. Such a
response indicates that communications have been established. If a “No
Communications with Rack” error message appears, proceed to
"Troubleshooting Communications" on page 26.
9. If the baud rate of the CNMSX was something other than 38400, then
the software automatically adjusts the baud rate to 38400.
Troubleshooting Communications
NOTE:
This section covers troubleshooting communications of the CNMSX via RS-
232 to the COMPUTER port. For troubleshooting Ethernet communications of the
CNMSX with the optional CNX Ethernet expansion card, refer to the CNXENET or
Operations & Installation Guide (latest revision of Doc. 8129 or 8153,
respectively) for further information.
If communications with the CNMSX was not established, follow the steps in this
section to help remedy the problem. After performing each step, repeat step 7 in
"Obtaining Communications" on page 24 again.
1. Try repeating step 7 from "Obtaining Communications" on page 24 to
attempt to establish communications.
2. Verify that the cable being used is correct. It should be a straight-
through cable. That is, pin 1 on one end is connected to pin 1 on the
other end. Pin 2 connects to pin 2, etc. To work properly, pins 2, 3, and
5 must be connected.
3. Verify that the proper COM port on the PC has been selected. Some
computers have more than one COM port; some of which may be
internal (e.g., for a modem). If verification can not be made, consult the
user’s manual or contact the PC manufacturer.
4. Check
the
ERR
LED on the front of the CNMSX. If the LED is
illuminated, unplug the unit and reapply power after a few seconds. If
the LED illuminates again, call Crestron technical support. Refer to
"Further Inquiries" on page 36.
5. If steps 1 through 4 have failed to result in communications, the last
series of steps to perform is an overload/reset on the control processor.
Complete the following steps to do so.
5a. While the Viewport is displayed, select
Setup | Communications
Settings
(alternatively, depress
Alt+D
) to open the “Set Baud Rate”
dialog box.
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Integrated Control System: CNMSX
Operations Guide - DOC. 8118B
