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Radio
Transmission
Test
System
Test
Last
Detected
Fault
"E" Command
The 7720V2 is capable of sending a test message, which can be received by the
central station to confirm the radio's communication link to the central station.
For AlarmNet users, the test message will cause the master station network to send a
"Field Triggered Diagnostic Message" to the central station. This message provides
network information as well as signal strength and frequency characteristics of the
transmitted
messages. Refer to the AlarmNet User's Guide for detailed information
concerning these messages. The test message can be transmitted in any of three
ways.
1) The TEST INPUT (terminal 9) of the 7720V2 can be triggered with a voltage trigger,
which will initiate a 90 second cycle (total of 60 messages) of test message
transmissions.
Note that once this cycle has been initiated by a voltage trigger, it can be
turned off by using the T command described in (2). Otherwise, the messages will not
stop until the end of the cycle.
2) A 7720P Programming
Tool can be used, if connected to the programming
connector of the 7720V2.
To begin a cycle of test message transmissions, press
SHIH-8
(T command). This is a toggle function. To end the transmissions before the
end of the cycle, simply enter the command again.
3) A computer terminal can be used, if connected to the programming connector of the
7720V2. To begin a cycle of test message transmissions, press SHIFT-8 (T command).
This is a toggle function. To end the transmissions before the end of the cycle, simply
repeat the command.
Trigger an alarm by any convenient means and observe the LED indicators on the radio.
The yellow LED should light solidly, followed by the green LED flashing every 1-3
seconds at first, then slowing during the 6 minute cycle. This indicates that an alarm
message has been received at the radio (yellow), and the transmitter has been activated
(green). The red LED should not light.
If the zone is programmed for restore, restore the circuit. The yellow LED should light
solidly and the green LED should flash again, indicating transmission of the restore
message. The central station receiver should display alarrrdrestore messages for each
triggered alarmhestore performed.
[fat any time the red LED "lights, a radio fault has been detected. This could be caused
by a faulty antenna connection, or might be caused by low internal battery voltage, or a
failure in the radio's power circuits (see LED FLASH PAITERNS on page 4). The
7720P can display diagnostic data ("S" command)
related to the status of these
conditions. See Status Command section.
Replace the cover (if it was removed) and perform a control panel system test.
The last detected radio fault and the last reported radio fault can be viewed by pressing
"E" on a 7720P Programming Tool or an appropriate terminal when either device is
connected to the serial port of the 7720V2.
The message is a 2-line display where the top line identifies the last fault that the
7720V2 detected and the second line identifies the last fault that the 7720V2 actually
reported to the monitoring network. The
last detected
fault
represents a fault that
occurred on at least one transmission, but did not necessarily trip the fault relay. The
last reported
fault is
a fault that was present for a number of transmissions (typically
at least 4 consecutive transmissions) and which tripped the fault relay. The possible
fault numbers are described in the "S" command paragraph above. If the detected fault
does not match the reported fault value, and the transmission cycle has finished, it
indicates that the fault was not present long enough for the radio to report the
condition.
These values are stored in EEPROM and will be retained even when the 7720V2 is
powered down. To erase the numbers from memory, press ESC (shift BS) as the next
keystroke after pressing "E". The fault value is also erased automatically upon exiting
program mode.
NOTE: Since the execution of this command requires access to the RJI 1 connector,
the antenna and cover must be removed. By doing so, the radio will detect an RF fault
as well as a tamper. To prevent this fault from overwriting a previous fault, the radio does
not write the last reported fault to EEPROM if a tamper is detected.
-18-
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