Measurement Computing CB-7080 - Manual (Page 21)

CB-7080 & CB-7080D Counter/Timer User's Guide ~AA0
2-3
~AA0
Description: Reads the module status. The module status will be latched until ~AA1 command is sent. If the
host watchdog is enabled and the host is down, (no ~** command received), the module status will be set to 4.
If the module status=4, all output commands are ignored.
Syntax: ~AA0[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 !AASS[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
SS 2-character HEX status value:
Bit_0, Bit_1 = reserved
Bit_2 = 0: OK,
1: host watchdog time-out
[chk] 2-character checksum. If checksum is disabled, no [chk]
(cr) 0x0D
Examples :
Status of module 01 is OK:
Command: ~010(cr)
Response: 0100(cr)
Module status=04; host watchdog timed-out; HOST is down now:
Command: ~020(cr)
Response: 0204(cr)