The online test and simulation modes allow you to monitor the execution of your circuit program and how it reacts to the various input states.

Difference from simulation mode

In simulation mode you execute your circuit program on the PC. To do so, you do not require a LOGO!. The status of inputs can be preset on the PC.

During an online test, the circuit program is executed on a LOGO!. The user monitors this "work" of the LOGO!. The status of the inputs corresponds with the actual states at the LOGO! inputs.

Prerequisite for an online test

Your PC must be linked to a LOGO!. LOGO!Soft Comfort uses the interface you specified in Tools → Options: Interface to link to the LOGO!.

The circuit program to be tested can be in either FBD or LAD format and must be transferred to LOGO!.

The circuit programs in LOGO!Soft Comfort and on the LOGO! must be identical. Upload the program from the LOGO! to your PC, or download the program from your PC to the LOGO! if necessary.

You can monitor the parameters of up to 30 blocks. The number of blocks you can monitor simultaneously decreases when you monitor blocks that contain a high number of parameters (for example, analog SFBs).

To start the online test

1. Select the Tools → Online Test menu command.

If the LOGO! is in STOP, start it with the Start button.

Result: The LOGO! executes your circuit program.

Now start the monitoring mode.

1. Select the blocks whose parameters you want to monitor.
   Result: You are shown "live" how the parameters of the selected blocks change.

Switching the LOGO! to STOP

If you want to stop the LOGO! via LOGO!Soft Comfort, click on the Stop icon .

Devices of the 0BA4 series and later support Online tests.

Possible errors

The following types of errors can occur:

• Your LOGO! does not support the online test.
  Remedy: Install a LOGO! device of the 0BA4 or later series.

• The programs on your PC and on the LOGO! are different.
  Remedy: Upload the circuit program from the LOGO! to your PC, or download the program from your PC to LOGO!.

• You are attempting to monitor too many parameters/blocks simultaneously.
  Remedy: Reduce the number of simultaneously monitored parameters/blocks.

• The communication between your PC and LOGO! is down.
  Remedy: Re-establish the connection.

This menu command is inactive in the UDF Editor.