Publication 1756-RM084F-EN-P - July 2002
Entering Sequential Function Chart Logic 7-11
Entering the PRESET block
The preset block contains a structured text expression that specifies
the preset time in milliseconds for the step timer. Each line of
structured text begins with a single quote (‘).
PRESET (LanguageType := STX)
‘<structured_text>
END_PRESET
Entering the LIMIT_HIGH block
The limit high block contains a structured text expression that
specifies the preset time in milliseconds for a limit high alarm. Each
line of structured text begins with a single quote (‘).
LIMITHIGH (LanguageType := STX)
‘<structured_text>
END_LIMITHIGH
Entering the LIMIT_LOW block
The limit low block contains a structured text expression that specifies
the preset time in milliseconds for a limit low alarm. Each line of
structured text begins with a single quote (‘).
LIMITLOW (LanguageType := STX)
‘<structured_text>
END_LIMITLOW
LIMIT_HIGH_block
a structured text expression that specifies the preset time in milliseconds for a limit
high alarm. If the LimitHighUsesExpression attribute (above) is Yes, enter a LIMIT_HIGH
block.
see page 7-11
LIMIT_LOW_block
a structured text expression that specifies the preset time in milliseconds for a limit
low alarm. If the LimitLowUsesExpression attribute (above) is Yes, enter a LIMIT_LOW
block.
see page 7-11
ACTION_LIST_block
the actions in the step.
see page 7-12
Item: Identifies:
Spare Allen-Bradley Parts
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