ICP DAS USA I-7083, Руководство пользователя

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2.8 ~AA3ETT
z
Description
: Enable/disable the timer value of host watchdog. The
host watchdog timer is designed for software host watchdog.
When the software host watchdog is enable, the host must send
~** command to all modules before the timer is up. When the
~** command is received, the host watchdog timer is reset and
restart. Use ~AA2 to read the host watchdog status & value.
z
Syntax
: ~AA3ETT[chk](cr)
~ is a delimiter character
AA=2-character HEX module address, from 00 to FF
E=0 is disable and 1 is enable
TT=2-character HEX value, from 00 to FF, unit=0.1 second
[chk]=2-character checksum, if checksum disable
Æ
no [chk]
(cr)=0x0D
z
Response
: valid command
Æ
!AA[chk](cr)
invalid command
Æ
?AA[chk](cr)
no response
Æ
syntax error or communication
error or address error
! is a delimiter character indicating a valid command
? is a delimiter character indicating a invalid command
AA=2-character HEX module address
[chk]=2-character checksum, if checksum disable
Æ
no [chk]
(cr)=0x0D
z
Example
:
command: ~013000(cr)
response : !01(cr)
command: ~02310A(cr)
response : !02(cr)
disable host watchdog timer
of module 01
host watchdog timer of
module 02 is enable and =
0.1*10 = 1 second.
I-7083/7083D/7083B/7083BD User Manual (V 1.1, Dec/2007) ------------------ 32