SENSORNET TO RS-422 CODE CONVERTER
8000-2593-01, REV. C
INSTALLATION GUIDE
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Troubleshooting
The converter's front-panel LEDs indicate when
activity occurs during operation. They also identify
many errors that could occur:
422 LED on
steadily
ROM checksum or RAM
read/write failure. Reload
software from host.
(noise) LED
flashes randomly
Indicates SensorNet
transmission errors.
485 LED off
No SensorNet protocol detected.
∼
LED Off
No power.
µP LED flashes
rapidly
Code converter in loopback test.
Addendums
Addendum A:
Performing a
SensorNet Ping Test on a
Dome Camera
To conduct a ping test from the controller to a
dome, select the dome camera and run the test
(described in the appropriate operator manual).
Note:
- Address selected at the controller determines
the dome camera tested.
- Dome address switch settings must be correct.
- The code converter responds to pings if the
dome is responding.
- If the code converter is selected, only the
communication line from the controller to the
converter is tested.
- For how to get dome information and to conduct
the ping test from the controller, refer to
ADTT16E (8200-0306-02) and VM16 (8000-
2653-01) operation instructions. For just the
ping test, refer to MegaPower LT operation
instructions (MP-LTHB-1).
Note:
If a controller requests device information
from a camera having the same address as the
converter, the controller receives configuration
information from the converter instead of the dome.
Addendum B:
Performing an RS-422 Line Test
For each RS-422 port: Press and hold the port’s
line status test switch and view the adjacent LED.
The LED lights as follows:
Constant green,
Blinking red
RS-422 line correctly wired.
Constant green,
No red
"Data In" – shorted to ground.
Constant red,
Blinking green
"Data In" + and – wires
reversed.
Blinking red,
Green off
"Data In" + shorted to ground.
Both LEDs off
"Data In" + and – wires shorted
or open.
Addendum C:
Resetting the Code Converter
If communications cease, press the reset switch on
the front panel using a paper clip. If that fails, try
recycling power.
Addendum D:
Performing an
RS-422 Loopback Test
1. Disconnect data lines from all seven RS-422
connectors.
2. Wire each connector’s pins as follows:
Pin 1 white wire (RX+) loops to Pin 3 (TX+)
Pin 2 gray wire (RX–) loops to Pin 4 (TX–)
3. Set the code converter to address 00.
4. Press the RS-422 line test switch to the right of
the port.
5. If the LED adjacent top the port lights, that port
is working. If the LED remains off, the port is not
working.
6. Repeat steps 4 and 5 for the next port.
