Harness Processing > Processing Actions

Harness Engineering

Multiple actions are available when you process single or composite harnesses. You can either run a batch process or individual actions to significantly decrease processing time:

Calculate Wire / Multicore Lengths Note Click here to a view a video explaining wire length calculations. You will need a paid Capital Training Center subscription to view the video. Contact your Siemens representative for further details.

This action calculates the engineered wire and multicore lengths for the current harness design. The action analyzes all wiring content in the design and updates both the unmodified and modified wire and multicore lengths according to the defined Harness Engineering preferences, (see the “Project Preference Dialog Box”). Note Where the design level datum is set to Tip Term in the Edit Harness Details Dialog Box, Harness Engineering wire length calculations will use any splice knock-off value to adjust wire lengths. A negative knock-off will increase calculated wire length. A positive knock-off will decrease calculated wire length.

In-House Twisted Sheathed Multicores The process uses the following method to calculate the length of In-House Twisted Sheathed Multicores: If there is no shield wire present: Length = The twisted inner multicore length.

If there is a shield wire: Length = Longest wire at the End A + Common Multicore Length

Longest wire at End B. See also “Multicore End Identification” for more information about wire ends.

Calculate Node / Bundle Sizes This action calculates the size (diameter) of all nodes and bundles for the current harness design. The action analyzes each node and bundle in the design and updates both the sizes accordingly. The action takes into account all insulation coverings present in the design. See also Bundle Size Calculations. In-House Twisted Sheathed Multicores The process uses the Outer Diameter of any In-House Twisted Sheathed Multicores when calculating the full bundle diameter. The process calculates the Outer Diameter of such multicores as follows: The diameter of twisted inner + diameter of any shield drain wire + total insulation thickness.

After processing, this value is stored against the multicore as the “Outside Diameter” attribute.

Figure 296: Outer Diameter

Calculate Insulation Totals This action calculates the length or amount for each node and continuous insulation in the current harness design. The action uses manually overridden tube lengths where you have specified them. The action uses the latest calculated node and bundle sizes (if any). Tape quantity calculation When you run this action with the “Tape quantity calculation” Project Preference selected, the system creates a detailed report of the nodes and values used to calculate the insulation quantities for overlap and spiral tape. The report is displayed in the Design Log and on the Insulation Calculations tab in the Output Window. The preference generates the “Calculate Insulation Totals” inputs (such as bundle and node sizes used) and applies the formulas used in the system to display the report. To verify that the tape calculations are correct, you can compare the results in the report with the results stored in the data after running Harness Engineering. The report lists the following information and values for the bundle thickness and insulation required for each segment, and the total tape quantity required along the insulation run: Insulation — lists the following details for each insulation run: Name

Layer

Run

Type

Inputs — the insulation attributes and bundle properties used in the tape calculation.

Derived inputs — the number overlaps.

Calculation from node — the node names at the end of each calculated segment.

Calculation — insulation amounts and bundle sizes for each segment.

Result — combined insulation amounts across all segments along the insulation run.

Figure 297: Example Insulation Amount Between Nodes N57 to C and Total Insulation Amount Results

In-House Twisted Sheathed Multicores The process uses the following method to calculate the insulation totals on In-House Twisted Sheathed Multicores: As part of the wire / multicore length calculation, the process sets the insulation total as the quantity of tape used for the insulated length of the multicore.

The insulated length is the distance between the two divergence points.

The formula to calculate the tape quantity is the same as used for bundle insulations, but applied to the insulated length.

					Figure 298: Insulated Length
						
						 
					

			
				
					Component Insulation Quantities

					In order to calculate the quantity of insulation components, such as cable
						ties, the system uses Project
							Preferences to determine how many insulation components,
						separated by "Distance Between Items", will fit in the space available
						once any "Distance From Connector" lengths have been subtracted.

					If "Distance From Connector" is set to 0, and "Distance from Connector
						Calculation Method" is set to "Instance at Connector", an additional
						insulation component is needed for each connector on the bundle.

					If "Distance From Connector" is set to 0, but "Distance from Connector
						Calculation Method" is set to "Even Distribution", no insulation
						component will be placed at the connector.

					If "Distance From Connector" has a value greater than 0, no additional
						insulation components are needed, as they cannot be placed at the
						connector.

					In this example, a bundle of length 200 has insulation components (called
						Mark) placed along it with "Distance Between Items" = 20. "Distance From
						Connector" = 0, and "Distance from Connector Calculation Method" =
						"Instance at Connector".

					The system has calculated that 11 insulation components will be
						needed.

					
						
					

					This can be visualized as follows.

					
						
					

					The components are spaced 20 apart and, because "Distance From Connector"
						= 0, additional insulation components are needed at each of the
						connectors.

					If the same example is used but "Distance from Connector Calculation
						Method" = "Even Distribution", we obtain a different result of 9
						insulation components (Mark).

					
						
					

					This can be visualized as follows:

					
						
					

					The "Even Distribution" calculation method does not place insulation
						components at connectors, even if "Distance From Connector" = 0.

					If "Distance From Connector" was set to a value greater than 0, for
						example 30, then the result will be the same regardless of the setting
						of "Distance from Connector Calculation Method", because no insulation
						component can be placed at the connector.

					
						
					

					This can be visualized as follows:

					
						
					

					Because no insulation components can be placed within 30 of a connector,
						the available length is shortened by 60 (30 for each connector) and the
						insulation components distributed along the available length, meaning
						there is space for 8 of them.

Calculate Center Strip Distances This action facilitates reporting of the position of center-strip on a wire cut sheet.
Calculate Harness Weight This action calculates and stores the total weight of the harness, for example, materials (wires / multicores, tape, and so on) together with library components, and makes it available for styling / reporting: Harness weight = sum of all material and component / assembly weights

Material weight = amount x weight per unit (from Capital Component Manager)

Component / assembly weight = amount x weight (from Capital Component Manager)

Note If a weight is specified for an assembly library part, the weight of the individual component parts is not used to calculate the harness weight.

Balance Splices This action analyzes every wire contained in splice objects on the current design, and assigns either L or R wire entry to each splice, based on its respective location in the bundle structure. The section “Determining Splice Wire Left/Right Entry” in the Output Window displays feedback from running the action. Note Wires terminated in a cavity that is not named L, R, or X are always left unchanged.

Two further options exist when you select to perform Balance Splices as part of Harness Engineering during Harness Processing: Recalculate all splice wire routes (deselect for just those in cavity X). Select to consider wire routes that terminate in cavities L, R, and X. Clear to consider only wires in cavity X, leaving those in L and R unchanged.

Force Common Direction for Wires in Center Strips. Select to force a common direction for child wires in splices on a center strip wire.

You can use the Balanceable attribute in the Add Splice Dialog Box, to control whether Balance Splices assigns the wire entry directions on individual splices. Note You can select the Automate > Splices > Balance / Balance (Force Entry) ribbon actions to balance splices independently of the Harness Processing wizard.

			See also Splice Balancing.

Optimize Splice Positions This action analyzes each splice on the harness that is marked as “Repositionable” and relocates them (subject to any rules and constraints associated to the design) to their optimal position, see Splice Optimization. The Harness Engineering tab displays the results of the positioning process, together with any new node bundle and offset information for splices that have been moved. The log also details those splices already located at their optimal position.

Parent Topic:

Processing Actions