PCI Express Boards
Configuring Intelligent RS-485
4-4
8.
Go to the properties screen and select
COM Port needs to be diagnosed
. Click
Start Diagnosis
and
when the
CAUTION
message appears, click
OK
.
9.
Adjust non-MOXA devices according to the
Status
.
Status
Cause
Adjust Pull-High
/Low Resistor
Adjust Terminator
Resistor
Waveform Distortion Too many devices
–
Receive Reflect Signal Long distance
–
Data Error
Too many devices & long distance
NOTE
The Diagnosis tool is extremely sensitive; consequently, it could indicate errors even if the communication
status is OK. In this case, you can decide whether or not to make the suggested configuration changes.
10.
Repeat from Step 6 until the communication is in order.
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