Syntax and Semantics Check During Programming
Original instructions
About us
Introduction
Syntax and semantics check is performed directly when creating the program.
The result of this check is displayed in 3 formats:
NOTE: Warnings are not visualized in the program section.
Colors of Objects/Texts
Color
Description
black
Syntax and semantics are correct.
blue
Possible causes:
  • Associated variable is not declared.
  • Data type of the variable does not match the data type of the pin.
  • Input or output pin not connected.
red wavy line below text
invalid text. For example, variables which are not declared, variables with an incorrect data type, etc.
Tooltips
If the cursor is placed over an incorrect object, a tooltip is displayed with a brief description of the cause of the error/warning.
Messages in the Output Window
Error and warning messages are displayed in the output window after Build → Analyze.
Double-click an error or a warning message in the output window to navigate to the affected object in the LL984 Editor.
Errors messages in contrast to warning messages must be fixed, because they inhibit a successful Build.
Error Messages
The following is a list of example error messages that Analyze will display (E).
Error Message
illegal link
variable '%1' must be located
only coils allowed in last column
only one coil per row
FFB type '%1' isn't supported
last object in row must be coil
maximum column number allowed is '11'
maximum row number allowed is '7'
parameter '%1' expects constant value
illegal constant value '%1': %2
parameter '%1' expects variable
unsupported object
dimension of '%1' is too small, must be at least '%2'
dimension of '%1' must be '%2'
variable '%1' must be writable
parameter of '%1' must be a multiple of '%2'
parameter of '%1' must be a multiple of '%2'
usage of LL984 language is disabled
usage of SKP instruction is disabled
'%1' only allowed in subroutine network
'%1' must be in row1/column1
label '%1' isn't unique
label '%1' doesn't exist
subroutine segment doesn't exist
file '%1' is missing
IMC template '%1' doesn't exist
Non-latched usage of '%1' detected, which is used also as latched
Warning Messages
The following is a list of example warning messages that Analyze will display (W).
Warning Message
expression expected (if no actual parameter is assigned to a contact)
variable expected (if no actual parameter is assigned to a coil)
Tolerated Problems
Analyze will tolerate the following problems.
Problem
missing connections (to power rails or other logic elements)
skipping from a subroutine network to a network of another subroutine in the LL984 subroutine segment, if the project setting "SKP enabled" is checked