Rockwell Automation 1395 Multi-Comm Hardware/Software - Manual (Page 24)

Chapter 3
Configuration & Interfacing
3–13
Low Pass Filter
This block is a first order low pass filter which can be used to filter inputs.
The equation for this filter is shown below. This block receives an input
(parameter 515) and multiplies it by a filter gain value (parameter 516).
The output can be linked to other Drive parameters or used by other MCA
function blocks.
The equation for this filter is: Y
new
= Y
old
+ (Input – Y
old
) * Gain.
Figure 3-8. Filter Block
Filter In-
put
515
Filter Block
319
Filter
Output
516
Filter Gain
Parameter Description:
Filter Output (Par # 319) – This is a fast source parameter which contains
the output of the filter. The data can be used on the Adapter or passed to
the Drive by using a Drive configuration link.
Filter Input (Par # 515) – The parameter that specifies where this block
gets it’s input data. Input data can come from other functions on this
Adapter or from the Drive by using CA Indirect parameters. Refer to
Figures 3–3 and 3–4 for details on input data.
Filter Gain (Par # 516) – This parameter stores a value which is
multiplied with the input data specified in the Block Input parameter. It
can be any value between 4ms and 32.767 seconds.
Par Num Description
319
515
516
Table 3-J.
Parameter Listing for Filter Block
Output
Setup
Setup
Par Type
Filter Output
Filter Input
Filter Gain