Y_YA_RateCalculator

This function block determines the frequency and number of occurrences of an event, such as determining the part output rate of a machine. RateCalculator counts the number of times an input 'Sensor' signal produces a rising edge and determines the frequency of that signal with respect to a chosen time period. It can account for real-time changes to the time period.

Parameters:

*	Parameter	Data Type	Description	Default
VAR_INPUT
B	Enable	BOOL	The function will continue to execute every scan while Enable is held high and there are no errors.	FALSE
V	Sensor	BOOL	Periodic signal to be measured. Commonly a "part-complete" sensor.
V	TimePeriod_ms	DINT	Sensor is measured with respect to this time window (milliseconds) to determine the current real-time rate.
VAR_OUTPUT
B	Valid	BOOL	Indicates that the function is operating normally and the outputs of the function are valid.
B	Busy	BOOL	Set high upon the rising edge of the Execute input, and reset when Done, CommandAborted, or Error is true. In the case of a function block with an Enable input, a Busy output indicates the function is operating, but not ready to provide Valid information. (No Error)
B	Error	BOOL	Set high if an error has occurred during the execution of the function block. This output is cleared when 'Execute' or 'Enable' goes low.
B	ErrorID	UINT	If Error is true, this output provides the Error ID. This output is reset when 'Execute' or 'Enable' goes low.
V	CounterValue	LREAL	Number of times 'Sensor' has measured a rising edge since the function block has been enabled.
V	CurrentRate	LREAL	The current frequency of the 'Sensor' input with respect to the chosen time period.

Note:

Upon enabling or a change of the time period, the 'Busy' signal remains active until the specified time period elapses, whereupon 'Busy' will go low and 'Valid' will go high. This is to receive a complete initial measurement of the rate 'Sensor' / 'TimePeriod_ms'.

Error Description

See the Function Block ErrorID List