User Manual

8-4 Troubleshooting
20-COMM-H RS-485 HVAC Adapter User Manual
Publication 20COMM-UM009D-EN-P
Viewing Adapter Diagnostic
Items
If you encounter unexpected communications problems, the adapter’s
diagnostic items may help you or Rockwell Automation personnel
troubleshoot the problem. Adapter diagnostic items can be viewed using an
LCD PowerFlex 7-Class HIM (Diagnostics/Device Items), DriveExplorer
software (version 2.01 or higher), or DriveExecutive software (version 1.01
or higher).
Using the HIM to View Adapter Diagnostic Items
Step Keys Example Screen
1. Access parameters in the adapter. Refer
to Using the PowerFlex 7-Class HIM on
page 3-2.
2. Press the Up Arrow or Down Arrow to
scroll to Diagnostics.
3. Press Enter to display the Diagnostics
menu in the adapter.
4. Repeat steps 2 and 3 to enter the Device
Items option.
5. Press the Up Arrow or Down Arrow to
scroll through the items.
Table 8.A Adapter Diagnostic Items
No. Name Description
1 Common Logic Cmd The present value of the Common Logic Command being transmitted to
the drive by this adapter.
2 Prod Logic Cmd The present value of the Product Logic Command being transmitted to
the drive by this adapter.
3 Reference The present value of the Reference being transmitted to the drive by this
adapter. Note that a 16-bit value will be sent as the Most Significant
Word of the 32-bit field.
4 Common Logic Sts The present value of the Common Logic Status being received from the
drive by this adapter.
5 Prod Logic Sts The present value of the Product Logic Status being received from the
drive by this adapter.
6 Feedback The present value of the Feedback being received from the drive by this
adapter. Note that a 16-bit value will be sent as the Most Significant
Word of the 32-bit field.
7 Datalink A1 In The present value of respective Datalink In being transmitted to the
drive by this adapter. (If not using a Datalink, this parameter should have
a value of zero. Refer to Chapter 7
, Using Datalinks with All Protocols for
information about Datalinks.)
8 Datalink A2 In
9 Datalink B1 In
10 Datalink B2 In
11 Datalink C1 In
12 Datalink C2 In
13 Datalink D1 In
14 Datalink D2 In
or
or
Main Menu:
Diagnostics
Parameter
Device Select
Device Item # 27
Net Packet Rcvd
1022