YSI SonTek ADVField, Technical Documentation Manual

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SonTek/YSI
52 ADVField Operation Manual (September 1, 2001)
Baud Rate and Address Hex Rotary Dials (CPU Board)
Two hex rotary dials are mounted on the side of the CPU board (Figure 11). These dials can be
accessed without disassembling the processing module. One hex dial is labeled
BAUD
, and the
other,
ADDRESS
. The
BAUD
dial changes the communication baud rate; settings are shown in
Table 14. Use a small flat-head screwdriver to rotate the dial to the desired setting. Defaults:
9600 baud (firmware v6.8 and earlier; hex setting
3
); 19200 (firmware after v6.8; hex setting
4
).
Table 14. BAUD Dial Settings
Hex setting Baud rate Hex setting Baud rate Hex setting Baud rate
0 1200 baud 3 9600 baud 6 57600 baud
1 2400 baud 4 19200 baud 7 115200 baud
2 4800 baud 5 39400 baud
The
ADDRESS
switch is used for multiple system operation with RS485 communications proto-
col. For single system operation using RS232 or RS422, this switch should be set to
0
. For
RS485, the communication protocol jumpers (see below) must be set to RS422 / RS485 and the
address switch must be set to a hex value from
1
to
F
.
Communication Protocol Jumpers (CPU Board)
The ADVField supports three serial communication protocols: RS232 (default), RS422, and
RS485 (see §5.2 for information about the different protocols).
The communication protocol jumpers consist of eight,
2-pin pairs. Figure 14 shows the jumper configuration
for each protocol. The same jumper configuration is
used for RS422 and RS485. If the jumpers are set for
422/485
, the ADV will use the
ADDRESS
setting (see
above) to determine which protocol is used. An
AD-
DRESS
setting of
0
will use RS422, while any other
settings (
1
through
F
) will use RS485. To access the
jumpers, you must disassemble the processor (§4.4).
The ADV tool kit contains everything required for this task.
Note: Use of the RS485 protocol for multiple system operation requires special software and ca-
bling; if you are interested in this option, please contact SonTek for more details.
Figure 14 - Communication Jumpers