Measurement-computing CB-7080 Manuel d'utilisateur télécharger pdf (Page 23)

CB-7080 & CB-7080D Counter/Timer User's Guide ~AA2

2-5

~AA2

Description: Reads the status and timer value of host watchdog. When the 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 starts counting down. Use ~AA3ETT to enable/disable/setting the host

watchdog timer.

Syntax: ~AA2[chk](cr)

~ A delimiter character

AA 2-character HEX module address, from 00 to FF

[chk] 2-character checksum. If checksum is disabled, no [chk]

(cr) 0x0D

Response:

Valid response AASTT[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

S=0 Host watchdog is disabled

S=1 Host watchdog 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

Examples:

Host watchdog timer of module 01 is disabled

command: ~012(cr)

response: !01000(cr)

Host watchdog timer of module 02 is enabled and time-out

time = 0.1 x 10 = 1 second

command: ~022(cr)

response: !0210A(cr)

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Measurement-computing CB-7080 Manuel d'utilisateur Page 23