Xylem XL Series H-522 - Plus - Manual (Page 105)

XL™ Series
Digital I/O 12-3
When Configured For Triggered Continuous Output
Pressing the ENTER key will toggle the output from a 1 to a 0 or from a 0 to a 1 based on
the current state of the output.
When Configured For Triggered Pulsed Output
Pressing the ENTER key will cause the output to pulse on and then turn off. The duration
of the pulse is set using the “Pulse Length” option. This value is in milliseconds so the
pulse length will be between 1 mS and 9.999 seconds.
When Configured For On For Scan
Pressing the ENTER key will toggle the output as in the triggered continuous output
mode.
When Configured For Auto Continuous
Pressing the ENTER key will toggle the output as in the triggered continuous output
mode.
When Configured For Encoder Out
Pressing the ENTER key has no affect in this mode.
PC Interface View Built In Display Screen
A - I/O Mode = Digital Input Mode [Digital Input]
There are five main modes for the digital I/O pins. Each I/O pin can be individually configured as
an input or an output. The exceptions are the simulated quadrature shaft encoder output mode
and the quadrature shaft encoder input mode. When using the encoder output mode, both I/O pins
must be set to the “Encoder Out” mode. When using the quadrature input mode, both pins must
be set to the “Digital Input” mode.
“Digital Input” Input Mode
The selected pin is used as a digital input. This could be used to test the status of an external
device, such as a motor. The digital I/O pin would be used as the source for data in the logging
report options; a 1 would be stored if the motor was on, or a 0 would be stored if the motor was
off.
This is also the mode used if the digital I/Os are to be used with an external quadrature shaft
encoder.
“Trigger Cont.” Triggered Continuous Output Mode
The selected pin is configured as an output that will turn on and off based on a user defined
trigger condition. The output will stay on until the condition goes away. For example, if a pump
is to be turned on when the water level is greater than 10.0 feet, the user would set the trigger