Baud Rate; Receiver Address, Parity, And Master/Slave; Baud Rate Codes - Watkins-Johnson Company WJ-8718A/MFP Instruction Supplement

TABLE 2-1
WJ-8718A/MFP
the receiver in a remote state. The receiver can then be addressed to talk regardless of the
REMOTE switch position. The local or remote operating modes cannot be established by
remote command.
2.4.2.2
Baud Rate
The baud rate is established by precoded entries to the 81 switch assembly on the
I/O Interface Board. An open switch denotes binary 1 and a closed switch denotes binary
O.
Table 2-1 lists the baud rate codes. The switches are factory adjusted for a baud rate of 1200.
Table 2-1. Baud Rate Codes
Baud Rate 81-4 81-3 81-2
81-1
50
0 0
0 0
75 0 0 0
1
110 0 0 1
0
134.5 0 0 1 1
150
0
1 0 0
300
0 1 0
1
600 0 1 1 0
1200 0
1
1 1
1800 1 0 0 0
2000 1 0 0 1
2400 1 0 1 0
3600 1 0 1 1
4800 1 1
0
0
7200 1 1 0 1
9600
1 1
1 0
19200* 1 1 1
1
*NOTE: Use of baud rate over 9600 is not recommended.
2.4.2.3 Receiver Address, Parity, and Master/Slave
Up to 32 properly addressed receivers can be controlled by one remote device. As
shown in Figure 2-2, the receivers are series connected, or "daisy chained", and only one
receiver is interfaced directly to the remote control equipment. The serial data stream from
the remote control equipment is actively repeated to aU receivers in the chain, but only the·
addressed receiver "recognizes" its address and accepts the data.
Receiver address is established by five switch settings in the 82 switch assembly on
the I/O board. Table 2-2 lists the functions of the switch assembly. A closed switch denotes a
binary 1 and an open switch denotes a binary
O.
Valid receiver addresses are binary coded from
o
through 31, as listed in Table 2-3.
2-2