10
MDS SD4 Startup Guide
05-4669A01, Rev. B
Invisible
place
holder
Figure 7. LED Indicators
Event Codes
When an alarm condition exists, the transceiver creates a code that can
be read on a connected terminal. These codes can be helpful in
resolving many system difficulties. Refer to
Table 4
(
Page 11
) for a
definition of the event codes.
Checking for Alarms
—STAT command
To check for alarms, connect a terminal to the radio’s
COM1
(diagnos-
tics) connector.
See “COM1 CONNECTIONS” on Page 13
for pinout
information.
Enter
STAT
on the connected terminal. If no alarms exist, the message
NO ALARMS PRESENT
appears on the display.
If an alarm does exist, a two-digit alarm code (00–31) is displayed and
the event is identified as a Major or Minor Alarm. A brief description
of the alarm is also given.
Table 3. LED Status Indicators
LED Name
Description
PWR
• Continuous—Power applied, no problems detected.
• Rapid flash (5 times-per-second)—Alarm indication.
LAN
• Continuous—Local area network detected.
• Flashing—Data is being transmitted and received.
• Off—LAN not detected or excessive traffic is present.
COM1/COM2
The COM LEDs show activity on the serial payload data
port(s). The left LED shows TX data and the right one
shows RX data.
LINK
When lit, indicates that a communication link is established
with the master station.
Summary of Contents for MDS SD4 Series
Page 19: ...Installation Guide ...
