Mitsubishi Q Series Programming Guide

4 - 70 4 - 70
4 SFC PROGRAM CONFIGURATION
MELSEC-Q
(4) A block which has been forcibly deactivated is restarted as shown below.
Relevant Block Restart Status
When the START condition of block 0 is
"Auto START ON" in the SFC setting of the
PLC parameter dialog box.
Operation is restarted from the initial
step following END step processing.
Block 0
When the START condition of block 0 is
"Auto START OFF" in the SFC setting of the
PLC parameter dialog box.
Other than block 0
The block is deactivated after END
step processing, and processing is
restarted from the initial step when
another START request occurs for
that block.
[Program Example]
Use the contact of the "block START/END bit" when a transition occurs after block 1 ends.
Block 1
S0
S2
t0
t1
t2
S1
BL2
Block 0
S0
S1
t0
t1
t2
S2
BL1
1: Using "BL1" instead of "block
START/END bit" as contact, the
same o
p
eration can be
p
erformed.
Block 2
S0
S2
t0
t1
t2
S1
bM0
*1
Related Instructions
1) SFC control instructions
• Block START instruction (sBLm), block END instruction
(rBLm)............................................................................See Section 4.4.6.
2) SFC diagram symbols
• Block START step (Bm
, Bm )..................................See Sections 4.2.8.and 4.2.9.

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