Siemens 500 NIM User Manual
Page 44
Installation
3-9
SIMATIC TIWAY I Series 500 NIM User Manual
Configuration switches 1 through 4 (on the configuration switch bank)
select the data transmission rate. All devices on the network must be
configured to communicate at the same data rate. The data rates
corresponding to the switch settings are shown in Table 3-3.
For synchronous operation in RS-232-C communication, the rate of data
transmission is established by the modem. When setting switches one
through four, select a data rate which matches that of the modem exactly. If
this is not possible, select the next lower data rate below that of the
modems. Time-out values are determined by dipswitch settings, and
improper settings may cause erratic operation.
Synchronous operation is not valid for local line operation.
Table 3-3
Network Data Rate Switch Settings
Switch Settings
Data Rate
SW1
SW2
SW3
SW4
Data Rate
(BPS)
0
0
0
0
110
0
0
0
1
110
0
0
1
0
110
0
0
1
1
110
0
1
0
0
110
0
1
0
1
150
0
1
1
0
300
0
1
1
1
600
1
0
0
0
1200
1
0
0
1
2400
1
0
1
0
4800
1
0
1
1
9600
1
1
0
0
19,200
1
1
0
1
38,400
1
1
1
0
57,600
1
1
1
1
115,200
0 – closed = on
1 – open = off