Owner's manual

22 Rockwell Automation Publication 1756-UM536A-EN-P - April 2012
Chapter 2 Module Operation
To invoke the Preset Count function for a counter by using the hardware input
method, tie the function to a hardware input on the Input Configuration tab of
the Module Properties dialog box as shown in Figure 10
.
Figure 10 - Preset Count Function Controlled by Hardware Input
When tied to a hardware input, this function is edge-sensitive resulting in a preset
when the designated input transitions low or high:
• By default, the count is set to the preset value on a rising pulse edge.
• When the function is inverted, the count is set to the preset value on a
falling pulse edge.
To invoke the Preset Count function by using the output tag method, use the
Counter[x].PresetCount output tag as shown in Figure 11
.
Figure 11 - Counter[x]PresetCount Output Tag
Preset Count function for counter 4
is tied to hardware input 7.
0 = Tag-based preset not
active.
1 = Count transitions to the
preset value on a rising edge.