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END
Figure 6-4 Communication Troubleshooting Flowchart
Page 6–30
START
Verify unit
ID#, Security
Code and
Protocol are
Correct.
Verify jumper
and terminal &
pin wiring are
correct.
Does Unit
NO
YES
Respond to Host
Comm Request?
Investigate
Power Supply
Issues
Figure 5-1
YES
Unit Respond to
Communication
YES
Communication
Does Unit
Respond?
YES
NO
Transceiver
Comm Check
Transceiver
Transceiver
Supply voltage
Supply voltage
Test
within Specs?
YES
Voltage supply
from NGC unit
= 10.5 VDC?
NO
Substitute
Communication
Host Comm
Test Cable
Request?
NO
NO
Is
Is
Communication
RS-232?
RS-485?
YES
RS-232
RS-485
Communication
Test
Test
Test Passed?
YES
NO
Investigate
Transceiver
Issues
YES
12V
Communication
Supply Voltage
Test
Contact
NO
Totalflow
Technical
Support
NO
2101510 Rev. AG
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Table of Contents
Troubleshooting
