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ADS-14221, PPT2 User Manual
COMMAND CODE
BP
Action
Sequential
Directing
Response
with (90-99)
address
Yes
After (4)
DETAILS:
The Baud rate and Parity command is used to change the baud rate and parity type. Both the write enable (WE)
and BP command must be sent as a global address (e.g. *99); otherwise, the command is rejected and a read
status (RS) command error bit is set.
For this command, only the first two baud rate characters, that uniquely identify the baud rate, need to be used.
Values beyond the first two valid baud rate characters will be ignored. Example: *99BP=N48X1will cause the
baud rate to be set to 4800. If the first two baud rate characters are invalid, the command will be rejected and
the command error flag set in the RS command response.
For networked RS-232 devices, this command causes the new baud rate and parity setting to be changed and
the command to be retransmitted to the next PPT2. For multi-drop networked RS-485 devices all units receive
the command at the same time. When the command transmission is complete, the new baud rate and parity are
activated, but are not permanently stored in the EEPROM until an SP=All command is executed. A
corresponding new communication port baud rate must be selected before executing the SP=ALL command.
(Default BP=N9600)
NOTE:
As shipped, the PPT2 is set to a baud rate of 9600, 1 start bit, 8 data bits, no parity, and 1 stop bit. If the baud
rate has been changed to an unknown value, it will be necessary to search all the baud rate values to
reestablish communication.
When setting the baud rate, all continuous transmission commands (P2, P4 and T4) will be terminated.
EXAMPLES:
Inquiry: *ddBP
Response:
#ddBP=N
Both a *99WE and *99BP=.. global address must be used to change the baud rate.
Note:
Action:
*99WE
*99BP= {N|E|O} {
N
E
O
1200,...115,200
DIFFERENCES FROM LEGACY PPT:
The PPT2 adds three new baud rates: 38400, 57600, and 115200.
Baud Rate and Parity Setting
Input or
Requires
Output Type
Write Enable
In
Yes
#ddBP=E
or
12
24
00|
00|
No parity
Even parity
Odd parity
Baud rate (bits/sec)
COMMAND DESCRIPTION
Terminates
Continuous
Commands
Yes
EEPROM Store: *99WE
#ddBP=O
or
48
96
14
19
00|
00|
400|
200|2
October, 2016
Can Write to
Can Write to DAC
EEPROM
Yes (9)
No
*99SP=ALL
8
38
57
800|
400|
600|
24 of 85
11
5200}
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