Resetting Latched Diagnostics on a Digital Module

Use the Tag Editor to create a tag at controller scope with aMESSAGE data type.

Go to the Ladder Editor, and insert a rung that contains an MSG instruction. The instruction operand should be the MESSAGE tag you just created.

Select the button to the right of the operand to go to the

Message Configuration

dialog box.

For

Message Type

, choose

Generic CIP

.

For

Service Code

, enter 4B (Reset Latch Diagnostics service code).

For

Object Type

, enter 1E (Discrete Output Group).

For

Object ID

, enter 1.

Leave

Object Attribute

blank.

For

Source

, enter or choose a controller-scoped tag that is a DINT.

If the tag does not exist yet, select the

Create Tags

button to create it.

For

Num. Of Elements

, enter 4.

Leave the

Destination

blank.

Select the

Communication

tab.

For

Path

, enter module name or CIP path to the module.

For

Communication Method

, choose

CIP

.

Select the

OK

button.

Write logic or use the Data Monitor to set the values of the source tag. The tag represents a bit mask of the points on which to reset diagnostics.