Siemens EF 83H Series Manual de usuario descargar pdf (Pagina 58)

Communication Services

4-7

SIMATIC 505 PROFIBUS-FMS CP User Manual

4.2 Addressing

on Y

our Network

PROFIBUS

networks use a system of multiplexed addressing (multi-tiered)

for connections, as shown in Figure 4-2. The most basic address of a device

is the PROFIBUS network station address. The next level of addressing is a

Link Service Access Point (LSAP). Each station address is associated with

multiple LSAPs.

3245 3245 3245

x x 61 62 x x 61 62 x x 61 62

2310

Network

LSAPs

Station

Address

Station

Address

Station

Address

Figure 4-2

Multiplexed Addr

essing

When you set up your network, you assign each device a station address,

and then use this address when you configure the FMS CP module.

As shown in Figure 4-2, each device has a number of LSAPs that you use for

addressing FMS and FDL connections. Each LSAP can be used for one

connection only (except for FMS slaves). Some LSAPs are unavailable

because they are dedicated to other functions. If you select an LSAP that

has been previously dedicated, you receive a message to select a different

LSAP for your connection. Refer to T

able A-10 for LSAP assignment

restrictions.

For example, an FMS connection could be set up between LSAP 3 on Station

Address 2, and LSAP 5 on Station Address 10 (as shown on the example

network in Figure 4-3). However

, LSAP 3 on Station Address 2 and LSAP 5

on Station Address 10 are then occupied and may not be reused.

3245 3245 3245

x x 61 62 x x 61 62 x x 61 62

2 3 10

Network

LSAPs

Station

Address

Station

Address

Station

Address

Figure 4-3

Network Addr

essing Example

Multiplexed

Addressing

Station Addr

ess

LSAPs

1 2 ... 53 54 55 56 57 58 59 60 61 62 63 ... 186 187

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