Chapter 14 Remote  I/O Communication Module  AHRTU-PFBS 
14-47 
The following window contains the offset address of I/O modules that AHRTU-PFBS-5A configures. 
That is the offsets of the starting addresses of INPUT area and OUTPUT area that AH master PLC 
assigns to the master module with Byte as the unit. 
 
 
The D device in PLC regards Word as the unit, the offset address regards Byte as the unit and 
therefore the counting of the starting D register in the master PLC that the configured module of the 
slave corresponds to: 
The starting number of the D registers in OUTPUT area of the master PLC corresponding to the 
slave configured module = the starting address in OUTPUT area + (Address/2). 
The starting number of the D registers in INPUT area of the master PLC corresponding to the slave 
configured module = the starting address in INPUT area + (Address/2). 
The offset address of each module can also be assigned manually by not ticking “Auto addressing” 
on the ablove interface but inputing the value of offset address in Address column.