Rockwell Automation 1761-HHP-B30 MicroLogix 1000 with Hand-Held Programmer (HHP) - Manual (Page 333)

After You’ve Entered Your Program
Chapter 18
18–12
Setting the Input Filters
This option allows you to select input filter response times for the
1761-L16BWA and 1761-L32BWA micro controllers.
The input filter response time is the time from when the external input
voltage reaches an on or off state to when the micro controller recognizes
that change of state. The higher you set the response time, the longer it takes
for the input state change to reach the micro controller. However, setting
higher response times also provides better filtering of high frequency noise.
I N P U T F I L T E R S
L O C K P R O G
You can apply a unique input filter setting to each of the three input groups:
•
0 and 1
•
2 and 3
•
4 to x; where x=5 for 10 I/O point controllers, x=9 for 16 I/O point
controllers, x=19 for 32 I/O point controllers, and x=11 for analog
controllers
Important: The input filter response times for the 1761-L16AWA and
1761-L32AWA micro controllers are fixed at 8ms. Selecting
any other input filter response time for these controllers will not
change the response time of the inputs. However, your response
times given by your software will not show the actual times.
Also, the Input Filter Modified Bit (S5/13) will be set when the
controller is in run or test mode.
The minimum and maximum response times associated with each input filter
setting can be found on page A–6.
To change the input filter settings:
1. Put the controller in RPRG mode (if it is not already in that mode).
2. Access the program configuration menu.
3. Arrow up to the option INPUT FILTERS and select it.
3 times
ENT
I N P U T S 0 A N D 1
I N P U T S 2 A N D 3