Access to the configuration screen

Proceed with the following steps:

Step

Action

1

Select the processor.

Example:

2

Using the contextual menu, click Open.

3

Select the Configuration tab.

Configuration of the processor

Configuration Screen:

Proceed with the following steps:

Step

Action

1

If you wish, enable the RUN/STOP input.

2

If you wish, enable the Memory Protect.

The protection is activated by an input bit. It prohibits the transfer of a project into the PLC and modifications in online mode, regardless of the communication channel. The Run and Stop commands are authorized.

3

If you wish, enable the Automatic start in Run.

4

Confirm whether the internal words %MWi are to be initialized (on cold restart, on download, after the insert PCMCIA memory card) or not.

5

If you wish, enable the Cold Start Only feature.

6

Define for the application:

  • the number of internal bits %M,

  • the number of internal words %MW,

  • the number of constants %KW,

The bits and system words are fixed by the manufacturer.

7

The Memory cards field is completed according to the PCMCIA memory card selected. The data storage area is only used by EFBs such as READ_U_PCMCIA and WRITE_U_PCMCIA. The application area is used for the program. However, some parts of the program (located and unlocated variables, FB instances) are always present in the CPU internal memory.

Pre-set values

To select the:

  • default values, press the Default values button,

  • maximum values, press the Maximum values button,

Window displayed by pressing the Default values button:

Use of the command buttons:

Button

Role

Deselect All

Is used to invalidate all the default values posted on the right of the check boxes if they have been selected.

Select All

Is used to select all the default values posted on the right of the check boxes.

Cancel

Is used to exit.

OK

Is used to exit taking the values into account.
NOTE: With the Maximum values button, the window displayed is the same, only the values on the right of the check boxes are different.

RUN/STOP input

The input %Ir.m.c can be parameterized to switch the PLC to RUN/STOP mode in the following way:

  • %Ir.m.c to 1 -> the PLC switches to RUN (execution of the program),

  • %Ir.m.cl to 0 -> the PLC switches to STOP mode (stop program execution).

NOTE: A STOP command by the input %Ir.m.c is priority compared to a RUN operation by terminal or by network command.

An error on the RUN/STOP input causes a switch to STOP.

Memory protect

The input %Ir.m.c can be parameterized to protect the internal application ram and the memory card in the following way:

  • %Ir.m.c to 0 -> the internal application and the memory card are not protected,

  • %Ir.m.c to 1 -> the internal application and the memory card are protected.

NOTE: If the input is in error, %Ir.m.c is considered at 1 (memory is protected). To remove this protection in this configuration screen, the input should not be in error.

Automatic start in Run

The enabling of this option automatically changes the PLC to RUN mode at the time of a cold start.

Two types of start:

  • in the absence of a PCMCIA memory card, the PLC starts on the contents of the internal RAM of the processor,

  • in the presence of a PCMCIA memory card it is its content which fixes the start.

Initialize %MWi

On cold start, on download or after the insert of PCMCIA memory card:

Depending of the flag:

 

At the end of the transfer :

==> The initial values are assigned to the variables.

On setting of %S0 :

==> The initial values are assigned to the variables.

Not checked

OS >= V2.3

NO

NO

OS < V2.3

YES

NO

Checked

OS >= V2.3

YES

YES

OS < V2.3

YES

YES

the %MWi values will be initialized to 0 or initial value even if the box is unchecked,

  • if you change the %MW area on the field Size of global address fields,

  • if after a power restoration, the OS detects that the contents of the internal RAM has not been saved (PLC powered off and Back-up battery non-operational).

Cold Start Only

If checked, this option forces the cold start of the application, instead of the normal warm start.

By default, the Cold Start Only option is unchecked.

The Cold Start Only option is only supported since PLC V2.7.

An application using this functionality will not be:

  • downloadable on a PLC with a previous version,

  • executable on a PLC with a previous version,

  • usable with Unity Pro V4.0 or lower.

    Unity Pro is the former name of Control Expert for version 13.1 or earlier.

NOTE: The Cold Start Only check box is present only if the current selected PLC can support it.