Rockwell Automation 284 ArmorStart User Manual User Manual
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Bulletin 284 Programmable Parameters for Sensorless Vector Controllers
Table 6.8
How Step Logic Works
The step logic sequence begins with a valid start command. A normal
sequence always begins with 240 (Stp Logic 0).
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 155,
158, and 161) is set to 15 StpLogic Out, this parameter can control
the status of that output.
Any Step Logic parameter can be programmed to control a relay or
opto output, but you cannot control different outputs based on the
condition of different Step Logic commands.
Step Logic Settings
The logic for each function is determined by the four digits for each
step logic parameter. The following is a listing of the available
settings for each digit. Refer to Appendix J for details.
Step Logic Parameter
(Active when 138 = 6 Stp
Logic)
Related Preset Frequency
Parameter (Can be activated
independent of Step Logic
Parameters)
Related Step Logic Time
Parameter (Active when
240…247 Digit 0 or 1 are set
to 1, b, C, d, or E)
240 (Stp Logic 0)
170 (Preset Freq 0)
250 (Stp Logic Time 0)
241 (Stp Logic 1)
171 (Preset Freq 1)
251 (Stp Logic Time 1)
242 (Stp Logic 2)
172 (Preset Freq 2)
252 (Stp Logic Time 2)
243 (Stp Logic 3)
173 (Preset Freq 3)
253 (Stp Logic Time 3)
244 (Stp Logic 4)
174 (Preset Freq 4)
254 (Stp Logic Time 4)
245 (Stp Logic 5)
175 (Preset Freq 5)
255 (Stp Logic Time 5)
246 (Stp Logic 6)
176 (Preset Freq 6)
256 (Stp Logic Time 6)
247 (Stp Logic 7)
177 (Preset Freq 7)
257 (Stp Logic Time 7)