Measurement Computing CB-7080 - Manual (Page 24)

CB-7080 & CB-7080D Counter/Timer User's Guide ~AA3ETT
2-6
~AA3ETT
Description: Enable/disable the timer value of host watchdog. The host watchdog timer is a software host
watchdog. When the software host watchdog is enabled, the host must send ~** command to all modules
before the timer times-out. When the ~** command is received, the host watchdog timer is reset and restarted.
Use ~AA2 to read the host watchdog status and value.
Syntax : ~AA3ETT[chk](cr)
~ A delimiter character
AA 2-character HEX module address, from 00 to FF
E 0 is disabled and 1 is enabled
TT 2-character HEX value, from 00 to FF, unit=0.1 second
[chk] 2-character checksum. If checksum is disabled, no [chk].
(cr) 0x0D
Response :
Valid response !AA[chk](cr)
Invalid response ?AA[chk](cr)
no response Syntax error, communication error or address error
! A delimiter character indicating a valid response
? A delimiter character indicating an invalid response
AA 2-character HEX module address
[chk] 2-character checksum. If checksum is disabled  no [chk]
(cr) 0x0D
Examples :
Disable host watchdog timer of module 01
command ~013000(cr)
response !01(cr)
Host watchdog timer of module 02 is enabled and time-out time = 0.1 x 10 = 1 second.
command ~02310A(cr)
response !02(cr)