4 - 23 4 - 23
4 SFC PROGRAM CONFIGURATION
MELSEC-Q
4.3.1 Serial transition
“Serial transition” is the transition format in which processing proceeds to the step immediately
below the current step when the transition condition is satisfied.
Step “n+1” (operation output [B]
Step “n” (operation output [A])
Transition condition “b”
• When transition condition “b” becomes satisfied at step “n”
(operation output [A]) execution, operation output [A] will
be deactivated, and processing will proceed to step “n+1”
(operation output [B]).
(1) A maximum of 512*1 serial transition steps (
, , ) can be described in each block.
Therefore, a maximum of 512* serial transitions (+) can be described.
However, there is a restriction on the number of lines as indicated below depending on the
SFC display column setting.
*1: 128 for the Basic model QCPU and Universal model QCPU
Max. of
512 serial
transitions
Max. of
1536 lines
Number
of lines
Number of columns (max. of 32)
Number of lines
Approx.3000
SFC display column setting value (n)
When SFC display column
setting is “1” or “2”
When SFC display
column setting is “n”
Examples of the permissible number of lines
corresponding to a few SFC display column
setting values are shown below. The SFC dis-
play column setting value can be designated
freely within a 1 to 32 range.
SFC Display Col-
umn setting
Number of Lines
Possible
1/2 1536
8 384
16 192
22
28
32
138
108
96
To Next Page
Loading...
Need help?
General
