Rockwell Automation 1760-xxxx Pico Controller User Manual - Manual (Page 171)

Publication 1760-UM001D-EN-P - September 2005
Inside Pico 8-3
Determine Cycle Time of
Circuit Diagrams The maximum cycle time of a circuit diagram must be known in order
to determine the maximum counter frequency or reaction time of
Pico.
Blank Cycle Time Calculation Tables can be found on page A-13 of
this manual.
1760-L12xxx Cycle Time
For 1760-L12xxx, the cycle time can be calculated as follows:
List of Times for Processing Function Relays
Function Number Time Duration
in µs Total
Basic pulse 1 210 –
Refresh 1 3500 –
Contacts and bridged contact fields – 20 –
Coils – 20 –
Total rungs from the first one to the last
one, with empty ones in between – 50 –
Connecting lines (only )
– 20 –
Timing relays – – –
Counters – – –
Analog value function relays – – –
Total –
Number 1 2 3 4 5 6 7 8
Timing relays in µs 20 40 80 120 160 200 240 280
Counters in µs 20 50 90 130 170 210 260 310
Analog value processors in µs 80 100 120 140 160 180 220 260
, ,