Self-Diagnostic Test - Omron SYSDRIVE 3G3MV SERIES User Manual

Communications
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Self-diagnostic Test

The Inverter incorporates a self-diagnostic test function that checks whether
RS-422/485 communications are functioning.
If the Inverter has a communications failure, take the steps provided below to check
whether the communications function of the Inverter is normal.
H Self-diagnostic Test Steps
1. Set the Parameter
S Set n056 for multi-function input 7 (S7) to 35 through the Digital Operator.
2. Turn OFF the Inverter and Wire the Terminal
S Turn OFF the Inverter and wire the following control terminals. At this time, make sure that all other
circuit terminals are open.
3. Turn ON the Inverter and Check the Display
S Turn ON the Inverter.
S Check the display on the Digital Operator.
Normal
The display is normal with no error code displayed.
Fault
The display shows "CE" (communications time-over) or "CAL" (communications standby). In
either case, the communications circuit of the Inverter is broken. Replace the Inverter.
Set SW1 to NPN.
Connect S7 and SC.
Connect R+ and S+.
Connect R– and S–.
Chapter 7
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