Specifying properties of a frequency block

The frequency block measures a signal on an I/O board at the specified base address and channel number and outputs the frequency in hertz.

To specify frequency block properties

1.    Choose Blocks > Real Time and drag a frequency block into the work area.

2.    Choose Edit > Block Properties and click the frequency block, or right-click the frequency block.

The 9513 Counter Input Setup dialog box appears.

3.    Do one or more of the following:

Use this parameter



Provide a unique name for your frequency block. By naming frequency blocks, you reduce the risk of misreading your diagram, particularly when you are using more than one frequency block.

Base Address

Indicate the I/O port register address through which the real-time driver commands the board. Enter the base address as a hexadecimal number, followed by an “H.”


Enter a number that corresponds with the channel number on the screw terminal or termination panel supplied with your I/O board. Embed uses channel 0 as the first channel, even if the documentation supplied by the board vendor describes the first channel as channel 1.

Clock Freq.

Enter a value that corresponds with the base frequency crystal value set on your I/O board. If the value you enter does not match the base frequency crystal value, erroneous results are produced.

4.    Click OK, or press ENTER.