Rockwell Automation Reliance Electric MD65, User Manual

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9-42
MD65 AC Drive User Manual
How StepLogic
TM
Works
The StepLogic
TM
sequence begins with a valid start command. A
normal sequence always begins with Stp Logic 0 (A140).
Digit 0: Logic For Next Step
This digit defines the logic for the next step. When the condition is
met, the program advances to the next step. Step 0 follows Step 7.
Example: Digit 0 is set 3. When “Logic In2” becomes active, the
program advances to the next step.
Digit 1: Logic to Jump to a Different Step
For all settings other than F, when the condition is met, the program
overrides Digit 0 and jumps to the step defined by digit 2.
Digit 2: Different Step to Jump
When the condition for digit 1 is met, the digit 2 setting determines
the next step or to end the program.
Digit 3: Step Settings
This digit defines what accel/decel profile the speed command will
follow and the direction of the command for the current step. In
addition, if a relay or opto output (parameters A055, A058, and
A061) is set to 15 = StpLogic Out, this parameter can control the
status of that output.
Any StepLogic
TM
parameter can be programmed to control a relay
or opto output, but you cannot control different outputs based on the
condition of different StepLogic
TM
commands.
StepLogic
TM
Settings
The logic for each function is determined by the four digits for each
StepLogic
TM
parameter. Figure 9.13 shows the available settings for
each digit.