Omron CJ1W-SCU32 Operation Manual page 273

Loopback Test
CJ-series Serial Communications Units Operation Manual for NJ-series CPU Unit(W494)
This section describes the procedure and other information required to conduct loop-
back tests to check the serial ports.
8-1 Executing Loopback Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-2
8-1-1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-2
8-1-2 Connection Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-2
8-1-3 Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-2
8-1-4 Indicators Used for the Loopback Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-3
8-2 Device Variable for CJ-series Unit (Loopback Test) . . . . . . . . . . . . . . . . . . 8-4
8-2-1 Device Variables for CJ-Series Unit for System Settings . . . . . . . . . . . . . . . . . 8-4
8-2-2 Device Variables for CJ-Series Unit for Status . . . . . . . . . . . . . . . . . . . . . . . . . 8-5
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8-1