Mitsubishi Electric MELSEC iQ-R Series Programming Manual page 116

Detailed expression of transitions
Create detailed expression of transitions in the Zoom editor. The condition can be created in following programming
languages.
Type
Ladder Detailed
diagram expression
MELSAP-L
(instruction
format)
Structured text language
FBD/LD
• The detailed expression of the same transition can be used for multiple transitions.
• The created detailed expression of a transition can be checked from the Zoom list. ( GX Works3
Operating Manual)
8 SFC PROGRAM
114
8.2 Structure
Description
Used to create a transition program consisting of a contact circuit and the TRAN instruction (Creating a dummy transition condition)
in a single circuit block. The transition becomes TRUE when the TRAN instruction is executed.
■Restrictions
• Inline ST cannot be used.
• Only a TRAN instruction can be input to the coil.
Page 116 Transition in MELSAP-L (instruction format)
Used to create the following transition program.
■Method of writing a TRAN function (Creating a dummy transition condition) call statement
TRAN(bLabel1 & bLabel2);
//The transition becomes TRUE when the Boolean expression of the input argument is true.
■Method of writing an assignment statement of Boolean expression for reserved word "TRAN"
TRAN := bLabel1 & bLabel2;
//The transition becomes TRUE when the Boolean expression of the right-hand side is true.
■Method of writing an assignment statement of Boolean expression for the transition name
Transition1 := bLabel1 & bLabel2;
//Transition1 indicates the transition name input on the SFC editor. The transition becomes TRUE. when the Boolean
expression of the right-hand side is true.
Used to create a transition program ending with the TRAN instruction (Creating a dummy transition condition) in a single FBD
network block.
■Restrictions
• Only one TRAN instruction can be used.
• A program to be assigned to the device/label cannot be created.
• Coil, function block, function (except some), jump, jump label, and return program elements cannot be used.
For the available instructions other than TRAN, refer to the following.
Page 115 Detailed expression of transitions