Example Of Ist Instruction Introduction (Example Of Workpiece Transfer Mechanism) - Mitsubishi Electric MELSEC FX3U Programming Manual

FX /FX /FX Series Programmable Controllers
3G 3U 3UC
Programming Manual - Basic & Applied Instruction Edition

14.1.2 Example of IST instruction introduction (example of workpiece transfer mechanism)

1. Operation mode
Zero return
Zero return
operation mode
PB
X021
X025
Individual
operation mode
X020
Leftward
Moving up
travel
PB PB
X005 X006
Rightward
Moving down
travel
PB PB
X010 X011
Pushbutton switches for individual operations
of the robot hand shown in the figure on the right
Pushbutton switches for the external circuit to
Operation mode
Individual
operation
mode
Manual
mode
Zero return
operation
mode
Stepping
operation
mode
Cycle
Automatic operation
mode mode
Continuous
operation
mode
408
Stepping
operation
X022
Cycle
operation mode
X023
Continuous
operation mode
X024
Unclamping
PB
PB
X007
Start X 026
Clamping
PB PB
X012
Stop X027
turn ON and OFF the load power supply
Each load is turned ON and OFF by an individual pushbutton switch.
When the pushbutton switch for zero return is pressed, the machine automatically returns to the
zero point.
Every time the start button is pressed, the machine performs one process.
When the start button is pressed while the machine is located at the zero point, the machine
performs one cycle of automatic operation and stops at the zero point.
If the stop button is pressed in the middle of one cycle, the machine stops immediately. When
the start button is pressed after that, the machine performs the continuous operation from the
last position, and automatically stops at the zero point.
When the start button is pressed while the machine is located at the zero point, the machine
starts continuous operation.
When the stop button is pressed, the machine finishes the current cycle until the zero point, and
then stops at the zero point.
Mechanism for transferring a workpiece from the
point A to the point B using the robot hand
Left limit X004
Power supply
PB
Emergency stop
PB
Contents of operation
14 Handy Instruction – FNC 60 to FNC 69
14.1 FNC 60 – IST / Initial State
Y003
Rightward Right limit X003
Y004
Leftward
Upper
limit X002 Moving down
Y002 Y000
Moving Lower
up limit X001
Clamping Y001
Unclamping Y001
Workpiece
Point A Point B