Remote Access to Variables

In all FBs and DBs, we place an access acronym in the comment line of each data. This is to help the user who is creating the visualization program, with this acronym it will indicate if the data is input, output, input/output, static and if its access is read, write or no access.

Table

Acronym	Type	Access
IR	Input	Read
IW	Input	Read/Write
IX	Input	No access
OR	Output	Read
OW	Output	Read/Write
OX	Output	No access
IOR	InOut	Read
IOW	InOut	Read/Write
IOX	InOut	No access
SR	Static	Read
SW	Static	Read/Write
SX	Static	No access

Example

FUNCTION_BLOCK "_foo"

  VAR_INTPUT
    variable1 { ExternalWritable := 'False'} : Bool; // IR: Comment text
  END_VAR

  VAR_OUTPUT
    variable2 { ExternalWritable := 'False'} : Bool; // OR: Comment text
  END_VAR

  VAR_IN_OUT
    variable3: Bool; // IOW: Comment text
  END_VAR

  VAR
    variable4: { ExternalAccesible := 'False'; ExternalVisible := 'False', ExternalWritable := 'False'}: Bool; // SX: Comment text
  END_VAR

END_FUNCTION_BLOCK