Mitsubishi Electric MELSEC iQ-R Series Programming Manual page 120

Direct expression of transitions
The transition which transfers an active state to the next step can be created directly on the SFC diagram. A contact of FBD/
LD element is connected to it.
Coil, function block, function, jump, jump label, and return elements cannot be used.
Select a transition and select [Edit]  [Modify]  [Direct Expression for Transition] from the menu. This can
connect the FBD/LD element to the left side of the transition. ( GX Works3 Operating Manual)
Transition label/device
Bit type label, bit device or Boolean value can be specified as a condition which transfer an active state to the next step.
Bit type label
Select a transition name, select [Edit]  [Modify]  [Name] from the menu, and input the bit type label, bit
device, or Boolean value to be specified. ( GX Works3 Operating Manual)
■ Precautions
• When a device (T, ST, LT, LST, C, LC) of timer or counter is used as a transition, the device operates as a contact (TS, STS,
LTS, LSTS, CS, LCS). Also, when a coil (TC, STC, LTC, LSTC, CC, LCC) of timer or counter is used, the coil operates as a
contact.
• To use a coil of timer or counter for transition, use a timer type or counter type label.
Ex.
Timer device and timer type label
When the contact (TS0) is on, the transition becomes TRUE.
When the coil of the timer type label (tLabel0) is on, the transition becomes TRUE.
8 SFC PROGRAM
118
8.2 Structure
Bit device
When the contact (TS1) is off, the transition becomes TRUE.
When the coil of the timer type label (tLabel1) is off, the transition becomes TRUE.
Boolean value