Toshiba T2N - Manual (Page 234)

5. Programming Language
User's manual 221
The following is a list of points to note when creating SFC programs.
(1) The capacity limits of SFC programs are set out in the following
Tables. Be careful not to exceed these capacities.
* Overall Capacities (Maximum numbers which can be
programmed in the T2N)
* Capacities per SFC Main Program/Macro Program
* Capacities per Action/Transition condition
*) See 5.5 ‘List of Instructions’ for the required numbers of
steps for SFC instructions and ladder diagram instructions.
(2) The starting and re-setting of an SFC program is carried out by
the SFC initialization instruction (SFC instruction/ladder diagram
instruction). SFC initialization makes the steps in a designated
area inactive and makes the initial step active. Therefore, the
area of the steps designated by SFC initialization (the number of
initialized steps) includes all the step numbers which are used in
that SFC program (including macro programs as well). Take care
that step numbers used in other SFC programs are not involved.
For instance, if the SFC initialization designation is 50 steps from
step number 0 and step 50 is used in that SFC program, when
SFC initialization is executed with step 50 in the active state, step
50 will remain active.
On the other hand, if the SFC initialization designation is 201
steps from step number 100 and step 300 is used in another SFC
program, when SFC initialization is executed with step 300 in the
active state, step 300 will become inactive without any condition.
Points to Note
Number of SFC main programs 64 (0-63)
Number of macro programs 128 (0-127)
Number of SFC steps 2048 (0-2047)
Number of SFC labels 1024 (0-1023)
Number of SFC steps 128
Number of instruction steps (SFC, actions and
transition conditions total)
1024 steps*
Number of simultaneous branches 5
SFC edit screen capacity 128 lines by 5 columns
Action program capacity 121 steps*
Transition condition capacity 110 steps*