Mitsubishi Q Series Programming Guide

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MELSEC-Q
1 GENERAL DESCRIPTION
1.2 SFC (MELSAP-L) Features
(1) Easy to design and maintain systems
It is possible to correspond the controls of the entire facility, mechanical devices of each
station, and all machines to the blocks and steps of the SFC program on a one-to-one basis.
Because of this capability, systems can be designed and maintained with ease even by those
with relatively little knowledge of sequence programs. Moreover, programs designed by other
programmers using this format are much easier to decode than sequence programs.
Step transition
control unit for
overall process
Station 1
control unit
Station 2
control unit
Station 3
control unit
Transfer machine
Overall system
(SFC program)
Step transition control
unit for overall process
(block 0)
Station 3
control unit
(block 3)
Station 1
control unit
(block 1)
Station 2
control unit
(block 2)
Transfer machine START
(initial step)
END
(END step)
Station 3 START
(block 3 START)
Station 2 START
(block 2 START)
Station 1 START
(block 1 START)
START
(initial step)
Pallet clamp
(step 1)
Drilling
(step 2)
Pallet unclamp
(step 3)
(END step)
START
(initial step)
START
(initial step)
Pallet clamp
(step 1)
Tapping
(step 2)
Pallet unclamp
(step 3)
(END step)
Pallet clamp
(step 1)
Workpiece unloading
(step 2)
Pallet unclamp
(step 3)
(END step)
Repeated

Mitsubishi Q Series Specifications

General

I/O Points	Up to 4096 points
Communication	Ethernet, RS-232, RS-485
I/O Modules	Digital, Analog, Specialized
Programming Language	Function Block Diagram, Structured Text
Power Supply	24V DC, 100-240V AC
Operating Temperature	0°C to 55°C
Shock Resistance	147 m/s2 acceleration, 3 times in each of X, Y, and Z directions
Program Capacity	Up to 252K steps