Rockwell Automation 1760-xxxx Pico GFX-70 Controllers User Manual - Manual (Page 192)

Publication 1760-UM002B-EN-P - March 2005
4-82 Wiring with Pico GFX-70
Coils
• CH01EN to CH04EN: enable of the counter
• CH01D to CH04D: count direction definition,
Status 0 = count upwards,
Status 1 = count downwards
• CH01RE to CH04RE: reset actual value to zero
• CH01SE to CH04SE: accept preset actual value with rising edge.
Memory Requirement of the High-Speed Counter
The high-speed counter function block requires 52 bytes of memory plus 4
bytes per constant on the function block inputs.
Retention
High-speed counter relays can be operated with retentive actual values. The
number of retentive counter relays can be selected in the SYSTEM
→
RETENTION menu.
If a counter relay is retentive, the actual value is retained when the operating
mode changes from RUN to STOP as well as when the power supply is
switched off.
If Pico GFX-70 is started in RUN mode, the counter relay operates with the
retentively saved actual value.