Outputs – Xylem System 5000 User Manual User Manual

Page 78

OUTPUTS

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

setup and selected Port.
More information regarding Modbus can

be found in Chapter 8 of this manual.

Modbus Master (Output)