Rockwell Automation Logix5000 Controllers Add-on Instructions Programming Manual User Manual
Page 33
Designing Add-On Instructions
Chapter 1
The following picture shows Simulation instruction in a ladder.
• If you want the parameter’s value displayed on the instruction face in
Ladder, set the parameter as visible.
• An Output parameter of the BOOL tag type that is not required, but
visible, will show as a status flag on the right side of the block in Ladder.
This can be used for status flags like DN or ER.
This table explains the effects of the Required and Visible parameter settings on
the display of the instructions.
Parameter
Type
Is the
Parameter
Required?
Is the
Parameter
Visible?
Ladder Diagram
Function Block Diagram
Structured Text
Does the
Value
display?
Does the
Argument
display?
Do You Need to
Connect the
Parameter?
Does the
Argument
display?
Can You Change the
Visibility Setting
Within the Function
Block?
Does the
Argument
display?
Input
Y
Y
Y
Y
Y
N/A
N
Y
Input
N
Y
Y
N
N
N/A
Y
N
Input
N
N
N
N
N
N/A
Y
N
Output
Y
Y
Y
Y
Y
N/A
N
Y
Output
N
Y
Y
N
N
N/A
Y
N
Output
N
N
N
N
N
/A
Y
N
InOut
Y
Y
N
Y
N/A
Y
N
Y
If you have a parameter for which the user must specify a tag as its source for input
or its destination as output, and you do not want this to be optional, set the
parameter as required. Any required parameters are automatically set to visible.
The Visible setting is always set to visible for InOut parameters. All InOut
parameters are required.
Rock well Automati on Publication 1756- PM010F-EN-P - Oct ober 2014
33