Program Supporting Process Control Function Blocks - Mitsubishi Electric MELSEC iQ-R Series Programming Manual

1.2
Program Supporting Process Control Function
Blocks
A process control function block can be used in an FBD/LD program for process control.
A FBD/LD program for process control can be created when the process control extension is enabled on the "Properties"
window of the program file.
The scan execution type or fixed scan execution type can be specified as an execution type of the FBD/LD program for
process control. For the scan execution type, only one program file with process control extension enabled can be created.
The following table shows the availability of process control function blocks.
Item
Calling Program FBD/LD (process function
source extension enabled)
FBD/LD (process function
extension disabled)
Other than FBD/LD
Function FBD/LD (user-defined tag FB)
block
FBD/LD (other than user-defined
*4
tag FB)
Other than FBD/LD
Function
*1 The tag access FB can be used only in the user-defined tag FB.
*2 The tag FB and the user-defined tag FB can be declared only as a global label. Declare them in the "Tag FB Setting" window of the
engineering tool. ( Page 33 Declaring a tag FB (Tag FB Setting))
*3 Actions and transitions in an SFC program are included.
*4 Do not use a process control function block or a user-defined FB uses a user-defined tag FB in programs with the process control
extension disabled. Doing so causes an error in programs.
Called function block
Local label
General Tag access
process FB
FB
 
 
*3
 
 
 
*3
 
 
Global label
Tag FB, General
user- process
defined tag FB
FB
 
 
 
*1
 
 
 
 
1 PROCESS CONTROL FUNCTION BLOCK

1.2 Program Supporting Process Control Function Blocks

Tag access Tag FB,
FB user-
defined tag
FB
*2
 
 
 
*2
 
*2
 
 
 
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