Create a procedure

Select

File

>

New Top Level

. The

New

dialog box opens.

Select

Procedure

, and then click

OK

. The

Procedure - Unit Requirements

dialog box opens.

Click the

Add Unit Requirement

button. The

Add Unit Requirement

dialog box opens.

In the

Name

box, type

FREEZER

.

The unit requirement Name is a label and acts like a lookup table for the

FactoryTalk Batch

Server. When a recipe is put on the Batch List and the

FactoryTalk Batch

Server encounters the unit requirement name, the Server looks up all the unit classes or instances that are mapped to the unit requirement name.

North_Parlor has two units that can make chocolate hazelnut ice cream. In the area model, there are two unit instances (NP_MIXER_1 and NP_MIXER_2) based on the MBR_MIXER_CLS unit class and two unit instances (NP_FREEZER_1 and NP_FREEZER2) based on the MBR_FREEZER_CLS unit class. You want the operator to select which mixer and freezer to use when the batch is created. To achieve this, you need to create a unit requirement name (MIXER) that is configured to the MBR_MIXER_CLS unit class and a unit requirement name (FREEZER) that is configured to the MBR_FREEZER_CLS unit class. You also want to select the batch creation binding method.

If the Class Based section is not enabled, select the

Class Based

option.

From the

Class Based

area, select

MBR_FREEZER_CLS

from the Unit Class list, and then click

OK

.

Select

Alias_MIXER_CLS

from the

Procedure - Unit Requirements

dialog box, and then click the

Edit Unit Requirement

button.

In the

Name

box, type

MIXER

.

From the

Class Based

list, select

MBR_MIXER_CLS

.

In the

Available Downstream Units

box, select

FREEZER

, and then click the right-arrow button.

Click

OK

.

When the recipe is put on the Batch List, the

FactoryTalk Batch

Server encounters the MIXER unit requirement name, which specifies the equipment required for the recipe, looks for all unit instances of the unit class with the MIXER unit requirement name, and then prompts the operator to select either NP_MIXER_1 or NP_MIXER_2. The same process occurs for the FREEZER unit requirement name.

Click

Close

.

From the

Recipe

menu, select

Header Data

, and then enter the following:

Enable

Released to Production

so this recipe displays when adding a batch to the batch list in the

FactoryTalk Batch

View.

Click

OK

.

Enter recipe formula parameters as indicated in this figure.

These default values are presented to the operator during batch creation. Since the formula values are deferred, the operator can change the default values.

Select the initial step, and then click the

Add Step

button. The

Unit Procedure Select

dialog box opens.

From the

Unit Requirements Name

list, select

MIXER

.

From the

Recipe Name

list, select

MCLS_SWEETCREAM_UP

, and then click

OK

.

Add MCLS_TRANSFER_OUT_UP in the same manner.

So far you have placed the ingredients into the mixer to produce the sweet cream base for the ice cream and added the step to transfer the mixture out of the mixer. Next, add the step to transfer the sweetcream base into the freezer.

Click the

Add Parallel

button. The

Unit Procedure Select

dialog box opens.

From the

Unit Requirements Name

list, select

FREEZER

.

From the

Recipe Name

list, select

MCLS_TRANSFER_IN_UP

, and then click

OK

.

Select the final transition, click the

Add Step

button, and then add MCLS_CHOCOLATE_HAZELNUT_UP with FREEZER as the equipment requirement.

Your recipe should be similar to the following figure.

Select

MCLS_SWEETCREAM_UP:1

, click the

Formula Values

button, add formula values as shown in this figure, and then click

OK

.

Select

MCLS_CHOCOLATE_HAZELNUT_UP:1

, click the

Formula Values

button, and then add formula values as shown in this diagram.

The origin of the formula values is deferred so the parameters display when a batch is added to the batch list to give the operator a chance to enter the values.

Save the procedure. If prompted, enter auditing comments, if desired, and click

OK

.