1. PowerFlex40 Step Logic May 2003

2. Logic Functions It starts with a philosophy Step Logic Logical functions Digital Input AND, OR, NOR Timer Function Digital Output(s) used Counter Function Digital Output(s) used

3. Step Logic Function Up to 8 step available (0 – 7) [Stp Logic 0 – 7] parameters A140 – A147 Uses Preset Frequencies only [Preset Freq 0 – 7] parameters (A070 – A077) Time Based Steps [Stp Logic Time 0 – 7] parameters A150 – A157 [Speed Reference] P038 setting Stp Logic

4. Step Logic Example Step 0Step 1Step 2Step 3Step 4Step 5Step 6Step 7 0 FWD REV time

5. Logic Function Digital Inputs Logic In1 & Logic In2 Logic Programming Define logic required for machine Digital Outputs On or Off depending on the state of the logic inputs. Can be used with or without Step Logic

6. Logic Example Step 0Step 1Step 2 Logic In1 Logic In2 StartStep 3 Freq

7. Timer Function Digital Inputs Timer Start, Reset Timer, Reset Timer & Counter Digital Output(s) Set Timer level Output changes state when level reached Can be used with or without Step Logic

8. Timer Example Preset Freq 1 Analog Reference Start Relay Out Digital In1 Preset Freq Digital In2 Timer Start 30 Hz 20 sec

9. Counter Function Digital Inputs Counter In, Reset Counter, Reset Timer & Counter Digital Output(s) Set Count level Output changes state when level reached Can be used with or without Step Logic

10. Counter Example Output Freq Start Relay Out Photo eye Digital In1 Counter In Digital In2 Reset Counter Limit Switch

11. Step Logic Programming 4 digit code defines step actions Digit 3 Defines the action during the current step Digit 2 Defines what step to jump to when Digit 1 logic met Digit 1 Defines the logic required for the jump Digit 0 Defines the logic for the next step (numeric progression)

12. Logic Codes

13. Applications for Step Logic Speed profile based on time Simple indexing Fwd & Rev with coarse positioning using presence sensors. Traversing Fwd & Rev of carriage with coarse positioning using presence sensors. Parts counter and diverter