B&B Electronics I-7060 - Manual - Manual (Page 59)

59
I-7000 DIO Manual Rev:B1.2
output command, like @AA(Data) or #AABBDD, the module will
ignore the command and return ‘!’, and will not change the output
to the output command value. The host watchdog timeout status
is set and store into EEPROM while the host watchdog timeout
interval expired, and only can be cleared by command ~AA1.
If user want to change the output, he need to clear the host watch-
dog timeout status firstly, and send output command to change the
output into desired value.
<2> PowerOn Value. Only the module reseted, and the
host watchdog timeout status is clear, the module’s output is set to
predefined PowerOn Value.
<3> Output command value. If the host watchdog timeout
status is clear, and user issue a digital output command, like @AA
(Data) or #AABBDD, to module for changing the output value.
The module will response success (receive >).
3.6 Latch Digital Input
For example, user connect the key switch to digital input
channel of a digital input/output module and want to read the key
stoke. The key input is a pulse digial input, and user will lost the
strike. While reading by command $AA6 in A and
B position, the response is that no key stroke and
he will lose the key stroke information. Respectly, the read latch-
low digital input command $AAL0 will slove this problem. When
issue $AAL0 command in A and B position, the response denote
that there is a low pulse between A and B position for a key storke.