Rockwell Automation AutoMax Enhanced Ladder Language Reference Manual - Manual (Page 254)

12Ć2
12.1 I/O Read (IOR)
Use the I/O Read instruction to get information from I/O modules. This instruction is
useful for reading data from:
D nonĆReliance I/O modules that are only byteĆaccessible
D any modules that have not been configured in the rack configurator
Use the I/O Read instruction to read a:
D byte Ć This is used for modules that support only 8Ćbit addressing.
D double byte Ć This should only be used for nonĆReliance modules that contain 16Ćbit
data but only support 8Ćbit Multibus access.
D integer (16Ćbits)
D double integer (32Ćbits)
While the enable bit is true, the Processor reads the I/O data you specified from the
location you specified. The data is stored in Out.