Creating a Modular Variant

Length Bundle

You can define functional variant codes and corresponding lengths on a bundle of a modular parent design. Modular breakdown assigns the length values according to the set of chosen module codes for the designs to be produced.

The example uses functional variant codes but the same steps can be applied for production variant codes.

Prerequisites

• Modular parent harness has been created and is ready to run Modular Breakdown.

• Variant functional module codes have been created, (in the Module Code Dialog Box), and applied to the required designs, (see “Editing the Information for a Design”). In Figure 405, child module design LHD PwrWindows has been assigned Applicable Variant FM Code VFM7. Figure 405: Variant FM Code VFM7 Added In Figure 406, child module design RHD PwrWindows has been assigned Applicable Variant FM Code VFM8. Figure 406: Variant FM Code VFM8 Added

Procedure

1. On the parent harness diagram, right-click the required bundle and select Edit Bundle from the context menu. The Edit Bundle Dialog Box displays.

2. Click the Rules tab and click the ellipsis button in the Variant Expression field, to open the Variant Expression Editor Dialog Box.

3. Select the Functional Variant Code radio button in the Expression Type panel, and then select the required functional variant module code from the list in the Expression Builder panel. Click OK.

4. Enter the required length value in the Variant Length field. To add further variant details, select the next empty row and repeat steps 2 and 3. Click OK.

5. In Figure 407, two variant expressions, VFM7 and VFM8, with variant lengths of 200.0 and 250.0, are defined for the bundle.Figure 407: Set Bundle Variance

6. Run Harness Processing > Modular Breakdown. This will apply the specified variant lengths to the bundles in the appropriate child designs.

Results

• Modular Breakdown calculates the bundle lengths using their variant expressions:

In Figure 408, the bundle length is 200.0 on design LHD PwrWindows, which has been assigned Applicable Variant FM Code VFM7.

Figure 408: Bundle Length VFM7

In Figure 409, the bundle length is 250.0 on design RHD PwrWindows, which has been assigned Applicable Variant FM Code VFM8.

Figure 409: Bundle Length VFM8

Parent Topic:

Variant Length Bundles and Component Positions

Related Topics

• Creating Variant Positions for Components

• Applicable Variant FM/PM Codes Help

• Applicable Functional Module Codes Dialog Box

• Applicable Production Module Codes Dialog Box

Capital Harness Designer User Guide, 2512

Unpublished work. © 2025 Siemens