Siemens SIMATIC TIWAY 1 Especificaciones descargar pdf (Pagina 30)

Network Design

and Setup

3–3

Network Design and Setup

Determine how you plan to use the information that is transferred. This may help you

design your network. For example, are you trying to share data between several

machines, or are you trying to obtain data to be used in production reports or

spreadsheets? Once you’ve taken a look at your application, you should be able to

identify the configuration needs. For example, our simple widget factory needs to

accomplish the following things.

Production Management: The production management system needs to issue

build orders and obtain data that can be used in production reports. The

management system also needs to monitor the production lines to determine which

line should receive the build orders. For example, one line may be behind schedule

while the other is completely free.

Production Lines 1 & 2: Each production line has a series of operations that must

be followed to build a finished product. Once they are completed they can be sent to

either pack station for packaging. In the real world, we all know that equipment

sometimes doesn’t work quite right, so each station should be monitored for

operational status.

Pack Stations: The finished products are sent to the pack stations, which in turn

send the cases to a palletizer for final shipping. Since there’s only one palletizer and

two stations packing different product models, the pack stations should coordinate

their deliveries.

Palletizer: The palletizer stacks the widgets into (hopefully) nice, neat packages of

widgets that can be sold by the millions.

Even though the three basic network configurations can be combined in an

application, each network remains independent. The master station from one

network cannot request data directly from slave stations on another network. This

does not mean you cannot obtain data from these networks, you can. It just requires

more than one interface for that slave station. For example, a DL440 PLC station

with two DCM (Data Communication Module) interfaces actually can connect to

three different networks. Check the manual for your particular slave station interface

to determine the maximum number allowed in a single base.

Built-in DirectNET Port

Network #1

DCMs

Networks #2 and #3

Identify Your

System

Requirements

Examine Data

Sharing

Requirements

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