B&B Electronics GW-7552 - Manual - Manual (Page 14)

GW-7552 PROFIBUS/MODBUS GATEWAY User Manual (Version 1.40, Apr/2012) PAGE: 14
Figure 11 PROFIBUS connector
The number of stations in a Profibus network is restricted to 126. According to
the PROFIBUS specification up to 32 stations are allowed per segment. A
repeater has to be used to link the bus segments.
2.4 Setting the Profibus Address
The station address of GW-7552 can be set by using either the dip switch or by
writing it directly to the EEPROM. The dip switch covers a range from 0 to 255.
The valid address range of a Profibus station spans from 0 to 126. Table 8 shows
three examples of setting the station address by using the dip switch. The dip
switches are accessed by opening the modules housing (Figure 12). Table 9
explains which address will be used by the module after power on, if the dip
switch address setting differs from the address stored in the EEPROM.
Table 8: Dip switch setting example
DIP SWITCH(SW1)
Station address
1 2 3 4 5 6 7 8
1 1 0 0 0 0 0 0 0
10 0 1 0 1 0 0 0 0
126 0 1 1 1 1 1 1 0
Terminator Switch
Terminator OFF
Terminator ON