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User´s Guide Power Rail Booster Version 12/2005

5 Configuration

5.1 Procedure

Configuration is handled in steps with the aid of the „PRB-Checker“ tool and

application-specific data as described below.

1. Checking to see whether there is a need for dividing the layout into multiple DP

master segments.

Prerequisites:

- Knowledge of the total number of vehicles in the plant

- Knowledge of the maximum permissible typical bus cycle time for the

application

Division of the layout is always required when:

- there are more than 125 vehicles in the plant

- shorter typical bus cycle times are required

- the base load of the infeed PRB is to be reduced

Result:

- Number of DP master segments

- Transmission speed used.

2. Checking to see whether there is a need to divide the number of DP master

segments specified in Step 1 into multiple PRB segments. This step must be

performed separately for each DP master segment specified in Step 1.

Prerequisites:

- Results from Step 1

- „PRB Checker“ configuring tool

- Layout of the plant with dimensions

- Number of slaves in the relevant DP master segment

- Number of vehicles in the relevant PRB segment. Each Power Rail Segment

Controller connected to the segment also has to be treated as vehicle.

- Length of the cable between collector and vehicle

- Maximum length of the data in the input/output bytes to be interchanged

between stationary control system and vehicle control system.

Division is always required when it is not possible

- to supply the entire rail length of the relevant DP master segment

- to supply the maximum possible number of vehicles in the relevant DP

master segment

with a stationary PRB.

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Siemens 6ES7 972-4AA02-0XA0 User Manual

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