Siemens SIMATIC TIWAY 1 - Manual (Page 72)

CONFIGURING THE HOST COMPUTER PORT
UNILINK HOST ADAPTER 3–14
USER MANUAL
Position 9 on Dipswitch 2 is for selecting the adapter’s operational mode and will
be discussed in more detail in Chapter 2. Position 10 should be down for normal
operation. The other switch positions on Dipswitch 1 define the TIWAY I
network parameters and are discussed in more detail in Chapter 4.
To select the BDLC protocol as the operating protocol, set position 1 of Dipswitch
1 down as shown in Figure 3–11. With BDLC, the host port parameters are
configured with both dipswitches. Since the data is transferred as 8-bit bytes,
there is no parity bit selection.
1 2 3 4 5 6 7 8 9 10
U
P
DIPSWITCH 1
HOST COMMAND
MSB LSB
1 2 3 4 5 6 7 8 9 10
U
P
DIPSWITCH 2
MSB LSB
UP = SYNCHRONOUS
DOWN = ASYNCHRONOUS
UP = FULL DUPLEX
DOWN = HALF DUPLEX
UP = TEST MODE
DOWN = RUN MODE
UP = HIU/EHA &
DOWN = MHIU/EHA
HOST PORT BAUD RATE
HOST PORT
HOST PORT
00 = STANDALONE
01 = 10 SEC.
10 = 20 SEC.
11 = 40 SEC.
BDLC ADDRESS
UNUSED
UNUSED
DOWN = BDLC
UNUSED
UNUSED
IO LOOP TEST
PROTOCOL
NM MODE
TIMEOUT
UP DOWN
KEY
Figure 3–11 BDLC Protocol Dipswitch Settings