Changing a Configuration on the Fly

The change configuration on the fly (CCOTF) feature makes it possible to change a Control Expert configuration while the PAC is running. Supported functions can include:

  • Adding a drop.

  • Adding an I/O module.

  • Deleting an I/O module.

  • Editing the configuration of an I/O module, including:

    • Change a parameter setting.

    • Add a channel function.

    • Delete a channel function.

    • Change a channel function.

NOTE: CCOTF functions do not apply to CIP Safety devices.

The CCOTF feature is enabled by selecting Online modification in RUN or STOP in the Configuration tab of the CPU module.

The basic functionality of CCOTF has been implemented in the M580 safety PAC, with the limitations described below.

For a full description of CCOTF, refer to the Modicon M580 Change Configuration on the Fly User Guide.

Limitations of CCOTF for an M580 Safety PAC

The CCOTF feature is implemented in the M580 safety PAC, with limitations that are based on the specific function and type of I/O module, as follows:

CCOTF Function

I/O Module Type & Operating Mode

Non-Interfering I/O

SIL3 Safety I/O

Maintenance mode

Safety mode

Maintenance mode

Safety mode

Add drop

✔

✔

✔1

✔

Add module

✔

✔

✔1

X

Delete module

✔

✔

✔

X

Edit I/O module configuration

✔

✔

X

X

✔: Allowed

X: Not allowed

1.Adding both a drop and a safety module requires two CCOTF sessions: one CCOTF session to add the drop, the second CCOTF session to add the safety module. These actions cannot be performed in a single CCOTF session.
NOTE: Edits made in a single CCOTF session can relate only to a single task (SAFE, MAST, FAST, AUX0, or AUX1).