User Manual Owner's manual

336 Rockwell Automation Publication 280E-UM001B-EN-P – July 2012
Appendix E StepLogic, Basic Logic and Timer/ Counter Functions
StepLogic Using Timed Steps
To activate this function, set Parameter 138 (Speed Reference) to Option 6
(StpLogic). Three parameters are used to configure the logic, speed reference, and
time for each step.
• Logic is defined using Parameters 240…247 (StpLogic x)
• Preset Speeds are set with Parameters 170…177 (Preset Freq x)
• Time of operation for each step is set with Parameters 250…257 (StpLogic
Time x)
The direction of motor rotation can be forward or reverse.
Figure 110 - Using Timed Steps
StepLogic Sequence
• Sequence begins with a valid start command
• A normal sequence begins with Step 0 and transitions to the next step
when the corresponding StepLogic time has expired
• Step 7 is followed by Step 0
• Sequence repeats until a stop is issued or a fault condition occurs
StepLogic Using Basic Logic
Functions
Digital input and digital output parameters can be configured to use logic to
transition to the next step. Logic In1 and Logic In2 are defined by programming
Parameters 151…154 (Digital In x Sel) to Option 23 (Logic In1) or Option 24
(Logic In2).
Time
0
Forward
Reverse
Step 0 Step 1 Step 2 Step 3 Step 4 Step 5 Step 6 Step 7