
28
Command
(1)
Reply A
Reply B
Reply C
Reply D
*01T1
#01CT=25.4
*02WE
*02DU=mmhg
*02DU
#02DU=MMHG
*92DU
#02DU=MMHG
*92DU
*91P1
#03CP=15.25
*91P1
*91CK
*91CK
#03CP=15.25
*99we
*99WE
*99bp=n19200
*99BP=N19200
*99RS= =
#01RS=0000
#02RS=010+
#03RS=000-
*99RS= =
*99WE
*99WE
*99sp=all
*99SP=ALL
*99P1
#01CP=1.274
#02CP=12.498
#03CP=-.00004
*99P1
(1) See Table 4 for types of sequential response commands.
Indicates there is no reply for this timing location
Figure 13. Multiple HPB Network Command and Replies
5.8 Command Errors
For a ring configuration, if the host processor receives a HPB reply with a * header character, this indicates one of
three conditions.
1.
If the reply is exactly the same as the command sent, and the command was not sent to a group or global
address (90 to 99), then the command has been rejected due to an incorrect header, address number,
command code or action character.
This error is common if an incorrect command code format was used or if the command should have been
preceded by a write enable (WE) command and was not.
If the command was rejected because of an incorrect command code or action character, an error indicator
is set which can be read and cleared with the Read Status (RS) command.
2.
If the command was a group or global command, then the reply should contain the *90.. to *99.. command
sent. (The command should contain a 9 as the first digit of the group or global address.) This reply
indicates to the host processor the command has been delivered to all addressed units in the network. This
indicates an error only if the reply does not contain the command sent.
3.
The command stream has been aborted by the sending host processor.
Note:
A
R
ead
S
tatus command is used to determine the error condition and clear the error status.
(See Read Status command description for error conditions.)
Computer
or Host
Processor
ID=01
Group=90
ID=02
Group=92
ID=03
Group=91
A
B
C
D
CMD
T
R
HPB
HPB
HPB
T - Transmit
R - Receive