Electro Cam 5000 Series - Manual (Page 60)

Mode 3 Logic Flow Chart
Appendix A-9
Mode 3 Logic Flow Chart
Power Up
Outputs Disabled
no
yes
Group Enable
Input On?
Outputs Enabled
1
2
3
4
The flow chart to the right details how Mode 3 operates.
The control’s response to any set of conditions can be
determined by stepping through the flow chart blocks using
those conditions when decision blocks are encountered.
The flow chart determines when the outputs are enabled
and disabled by Mode 3 logic. Note: Motion ANDing
(FCN 7) can also disable outputs.
How to Use the Flow Chart
To use the block diagram assume that the control is
continuously processing the blocks at a very fast rate and
is never stopped on any one block. The control will get
stuck processing the same path of blocks repeatedly (loop)
until a condition changes within one of the decision blocks
in that loop which alters the path. Response to a condition
change is almost instantaneous so the new conditions
established in the next loop take affect quickly. Note that
the logic path can only flow in the direction of the arrows,
never against them.
Rectangle Block
Output enable/disable status or a
logic memory flag is altered.
Diamond Block
A yes/no decision is made based on
the condition stated within the block.
Mode 3 Flow Chart Blocks
1. Control powers up based on the last group position
reference that was programmed into FCN 2.
2. Disable outputs (do not allow them to cycle at their
programmed position setpoints).
3. Check if group enable input on. Go to step 4 if it is, loop
back to step 2 if it is not.
4. Enable outputs to cycle on and off at their programmed
position setpoints. Loop back to step 3.
TASK
DECISION