Rockwell Automation 1753-PCS-PAR Using RSLogix Guard PLUS! with GuardPLC Controllers - Manual (Page 93)

Publication 1753-PM001A-EN-P - November 2005
Create User-Defined Function Blocks 8-7
Define I/O Positions
For input and output variables, you need to define the variables’
positions on the function block. The position portion of the variable
declaration display is only available for input and output variables.
You can define:
kg Kilogram mass
lm Lumen illumination
lx Lux illumination density
m Meter length
mol Mol amount of substance
N Newton force
Ohm Ohm electrical resistance
Pa Pascal pressure
Rad Radiant plane angle
s Siemens electrical conductance
S Second time
sr sRadiant solid angle
T Tesla magnetic flux density
V Volt electrical potential
W Watt power
Wb Weber magnetic flux
Abbreviation Unit Definition
In this field Define
Connection the side of the block (left, top, right, or bottom) to which the input or output should be connected
Position the position of the input or output within the block
Inverted whether to invert I/O of data type BOOL
You can only invert BOOL data. Inversions are indicated by a circle around the I/O.
Alternate I/O identifier an I/O-name
This name appears in the block, rather than the generated name.