Rockwell Automation 1761-HHP-B30 MicroLogix 1000 with Hand-Held Programmer (HHP) - Manual (Page 164)

Chapter 9
Using Comparison Instructions
9–13
Instruction List
File 2, Rung 3
Starts the conveyor in motion when the start button is pressed. However,
another condition must also be met before we start the conveyor: the
drill bit must be in its fully retracted position (home). This rung also
stops the conveyor when the stop button is pressed.
FUN GRAPHIC PARAMETER
CODE SYMBOL MNEMONIC NAME ADDRESS VALUE FORCES
–––– ––––––– –––––––– –––– ––––––– ––––– ––––––
20 |–] [– LD
START Button
I/6 0
22 –] [– AND
Drill Home LS
I/5 0
24 |_] [_| OR
Machine RUN Latch
B/0 0
23 –]/[– ANI
STOP Button
I/7 0
23 –]/[– ANI
change drill bit NOW
O/6 0
40 –( )– OUT
Machine RUN Latch
B/0 0
Beginning a Subroutine in File 7
This section of ladder keeps track of the total inches of paper the current drill
bit has drilled through. As the current bit wears out, a light illuminates on
the operator panel, as shown below, to warn the operator to change the drill
bit.
Note: For 32 I/O controllers: If the operator ignores this warning too long,
this ladder shuts the machine down until the operator changes the bit.
OPERATOR PANEL
Start I/6 Stop I/7
Change Tool Soon
O/4
Change Tool Now
O/6
Thumbwheel for
Thickness in 1/4”
Tool Change Reset 5 Hole
7 Hole 3 Hole
I/9–I/10 I/11–I/14
(Keyswitch)
I/8