Chapter 3 Specifications; Performance Specifications Related To Sfc Programs - Mitsubishi Electric MELSEC-Q Series Programming Manual

3
SPECIFICATIONS
This chapter describes the specifications of SFC programs.
3.1
Performance Specifications Related to SFC
Programs
This section describes the performance specifications of SFC programs.
Basic model QCPU
■Performance specifications
Item
SFC program Capacity
Number of files
Number of blocks
Number of SFC steps
Number of branches
Number of concurrently active steps (including
HOLD steps)
Number of operation output sequence steps
Number of transition condition sequence steps
Step transition watchdog timer function
*1 SFC program for program execution management cannot be created.
*2 The maximum number of sequence steps per block depends on the instruction used for operation output or a note editing setting. The
number of steps (2k steps) indicated in the table applies when "Unite (United Note)" is selected for note editing. Note that 2k sequence
steps per block may not be secured when "Peripheral (Peripheral Note)" is selected. If note editing is not set, 2k sequence steps or more
per block may be secured depending on an instruction used.
■Precautions for creating SFC programs
• Only one SFC program can be created. The created SFC program is a "scan execution type program".
• The Basic model QCPU allows creation of a total of two program files: one SFC program and one sequence program. (Two
sequence programs or two SFC programs cannot be created.)
• The created sequence program and SFC program names are MAIN.QPG and MAIN-SFC.QPG. (The file
names cannot be changed.)
• The SFC program and sequence program are processed in order of "sequence program" and "SFC
program". (The processing order of the SFC program and sequence program cannot be changed.)
Q00JCPU Q00CPU
Max. 8k steps Max. 8k steps
*1
Scannable SFC program: 1 file
Max. 128 blocks (0 to 127)
Max. 1024 steps for all blocks, max. 128 steps for one block
Max. of 32
Max. 1024 steps for all blocks, max. 128 steps for one block
Max. 2k sequence steps for one block
One ladder block only
None

3.1 Performance Specifications Related to SFC Programs

Q01CPU
Max. 14k steps
*2
, no restriction on one step
3 SPECIFICATIONS
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