Xylem System 5000 User Manual - Manual (Page 78)

OUTPUTS
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The selected Port will turn On (1) and Off (0) based on the Condition. The output will stay On
until the Condition returns false (non-positive). 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 Condition to “Stage>10.0”
(presuming the Task is named Stage). After the Input for Stage had been measured, the
Condition would be evaluated. If the Condition was true (Stage is greater than 10.0), the
Port would be set to 1 (High). The Port would stay High until the Condition evaluated to false
(Stage measures less than or equal to 10.0), at which time it will be set to 0 (Low).
Normal
The selected Port will briefly turn On (1) for the given number of milliseconds if the Condition
evaluates to true. For example, if a warning horn is to sound when the water is above 9.0 feet,
the user would set the Condition to “Stage>9.0” (presuming the Task is named Stage). After the
Input for Stage had been measured, the Condition would be evaluated. If the Condition was
true (Stage is greater than 9.0), the Port would be set to 1 (High) for the specified number of
milliseconds. After the pulse time has elapsed, the Port would be set to 0 (Low), thus sounding
the horn for the desired number of milliseconds. The Output would pulse after each scan
when the water level was greater than 9.0 feet.
Pulse
The selected Port will turn on at the beginning of each scan and delay the entire scanning
process for a time specified by setting the “I/O WarmUp Delay” option. After the warm up
delay, the normal scan process will continue. This would be used for applications that require
an external device to be turned on for every scan such as a motor or a pump. At the end of
the scan the output port will be turned off.
On For Scan
Modbus Master can be utilized as both an
Input and/or an Output.
Modbus Master Output enables the
System 5000
™
to act as a Modbus Master
on a Modbus network. The Output writes
to the designated external Modbus Slave
register according to the specified register
setup and selected Port.
More information regarding Modbus can
be found in Chapter 8 of this manual.
Modbus Master (Output)