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5-101

5 Understanding Programming

CJ2 CPU Unit Software User’s Manual

5-9 Checking Programs

5-9-3 Debugging with the Simulator

With the CX-Programmer, it is possible to generate system errors in the virtual PLC during ladder pro-

gramming simulation. It is easy to check operation of the ladder programming an the NS-series PT

when a PLC system error occurs by generating the desired fatal or non-fatal system error using a spe-

cial operation window. For information on the debugging procedure, refer to the CX-Programmer Oper-

ation Manual (Cat. No. W446).

Note Unlike with an actual error, ladder execution will not stop even if a fatal error is generated using the PLC error

generation simulation function.

Additional Information

System errors can also be generated in the PLC by using a FAL(006) or FALS(007) instruction.

Error Simulation Function

CX-Programmer

PLC Error Generation Simulator

Simulation

PLC error generation simulator

Simulation in progress

1. Start

Error List

Example: Turn ON battery error (A402.04).

Turn ON the Cycle Time Exceeded Flag (A401.08).

Turn ON the Memory Error Flag (A401.15).

2. Error generation indication

Error occurs

3. Error generation is simulated.

Virtual PLC

Omron CJ2 CPU UNIT SOFTWARE User Manual

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