I-7080, I-7080D, I-7080B, I7080BD User Manual (V 2.2) ------------------ 16
1.8.3 Digital Output Application Notes
The D/O0 & D/O1 can be used as D/O or alarm output as
following:
•
can be used as D/O in the frequency mode.
•
can be used as D/O in the counter mode & alarm disable
(by @AADA or @AADAN command)
•
can be used as alarm output in the counter mode & alarm
enable(by @AAEAT or @AAEAN command)
D/O 0
D/O 1
Frequency mode
D/O 0
D/O 1
Counter mode & alarm disable
D/O 0
D/O 1
Counter mode & alarm enable (alarm
mode 1, ~AAA1)
High-alarm
on counter 0
High-high alarm
on counter 0
Counter mode & alarm enable (alarm
mode 0, ~AAA0 & @AAEA0)
Alarm on
counter 0
D/O 1 or alarm
on counter 1
Counter mode & alarm enable (alrm
mode 0, ~AAA0 & @AAEA1)
D/O 0 or
alarm on
counter 0
alarm on counter
1
1.8.4
Programmable Threshold Voltage Setting
The programmable threshold voltage is valid for non-
isolated input of counter mode (50) & frequency mode(51).
The default setting are given as following:
TTL compatible
low trigger level = 0.8 volt
high trigger level = 2.4 volt
The high trigger level can be changed by $AA1H(data)
command, the low trigger can be changed by $AA1L(data)
comand. The high trigger level must be greater than the low
trigger level.