National Instruments RS-485 FP1001.fm Page 5 Thursday, July 31, 1997 8:51 AM

modules on different serial ports may have the same address. Every

module on one serial port of a host computer must have the same

baud rate.

Figure 6. Address and Baud Rate Switch

Switches 1-5 set the network address of the FP-1001. The

addresses of the terminal bases connected to the network module

are automatically configured to be sequentially higher than the

network module’s address. For example, if the network module is

set to address 20, the I/O module in the terminal base immediately

connected the network module is at address 21, the next I/O

module is at address 22, and so on. A terminal base is assigned a

network address whether an I/O module is inserted into it or not.

Table 1 shows the possible switch positions and the corresponding

address of the FP-1001.

Table 1. Network Address Switch Settings

Switch

Positions 1-5 Network Module

Address (Decimal) Switch

Positions 1-5 Network Module

Address (Decimal)

0130

10 140

20 150

30 160

12345678

Address Baud

Rate

Switch Cover

(Removed)

12345678

12345678 12345678

FP1001.fm Page 5 Thursday, July 31, 1997 8:51 AM