Rockwell Automation 1756-HSC ControlLogix High Speed Counter Module User Manual
Page 25
Rockwell Automation Publication 1756-UM007C-EN-P - November 2011
Counter Modes
25
Store and Reset, Wait, and Start
In the Store and Reset, Wait, and Start mode, the module:
• reads the Present Value and places it into the Stored Value on the
leading edge of Input Z and resets the count to zero (0) in the Present
Value.
• resumes normal counting from zero (0) after the Z-Input goes low.
• retains the Stored Value until it is overwritten by new data from the next
leading edge of a pulse on Input Z.
Store and Reset, and Start
In the Store and Reset, and Start mode, the module:
• reads the Present Value and places it into the Stored Value on the
leading edge of Input Z and resets the count to zero (0) in Present
Value.
• resumes counting from zero (0) regardless of the state of the Z-input.
• retains the Stored Value until it is overwritten by new data from the next
leading edge of a pulse on Input Z.
Present Value Tag
in Logix Controller
Stored Value Tag
in Logix Controller
Z-Input
10
11 0
1
2
3 0
0
1
2
...
11
11
11
11
11
3
3
3
3
3
44902
Incoming Pulses
0
0
0
10
11
12
13
14
15
16
17
18
19
20
Present Value Tag
in Logix Controller
Stored Value Tag
in Logix Controller
Z-Input
10
...
11
11
0
1
2
3
4
0
5
1
2
5
11
11
11
11
5
5
5
5
44903
3
4
10
11
12
13
14
15
16
17
18
19
20
Incoming Pulses