Troubleshooting Modbus communications for a PLC

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BillNye

New to MODBUS, wired up a new device and have it correctly wired, just can't get from Comm Status 2 to 8. Any suggestions on things I can try? I have tried conversion codes and modifying the number of holding registers but no success thus far. When checking diagnostics, I am transmitting and receiving. Just looking for more steps to try.
 
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