Measurement Computing CB-7080 - Manual (Page 43)

CB-7080 & CB-7080D Counter/Timer User's Guide $AA7N
2-25
$AA7N
Description : Read the overflow flag of counter. You can use the $AA6S command to reset the counter and
clear the overflow flag.
Syntax : $AA7N[chk](cr)
$ A delimiter character
AA 2-character HEX module address, from 00 to FF
N=0 Counter 0
N=1 Counter 1
[chk] 2-character checksum. If checksum is disabled, no [chk]
(cr) 0x0D
Response :
Valid response !AAS[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 no overflow
S=1 overflowed
[chk] 2-character checksum. If checksum is disabled, no [chk]
(cr) 0x0D
Examples :
Counter 0 has overflowed. Clear the overflow flag:
command: $0170(cr)
response: !011(cr)
command: $0160(cr)
response: !01(cr)
Counter 1 is OK:
command: $0171(cr)
response: !010(cr)