TU810V1 3BSE013230R1 base module

Follow these guidelines when you select 2-slot addressing: 

• Place an 8-point output module opposite a 16-point input module.

 • An I/O group having a 16-point input and output module cannot have a corresponding I/O group in the complementary chassis.

 • You can place an output module opposite another output module; they reflect the same bits in the output image table.

When you select 2-slot addressing, each pair of slots (one I/O group) is assigned to the corresponding pair of words in the input and output image tables. You assign one I/O rack number to eight I/O groups

You can use block-transfer modules in a complementary I/O system

with these restrictions:

• When using double-slot block-transfer modules: 

• The left slot of the complementary I/O group must be empty. 

• You can only place an 8-point output module (if any) in the right slot of the complementary I/O group. 

• When using single-slot block-transfer modules:

 • The right slot of the primary I/O group can be another single-slot block-transfer module, or an 8-point input or output module.

 • The left slot of the complementary I/O group must be empty. 

• You can place an 8-point output module in the right slot of the complementary I/O group; this slot must be empty if the corresponding slot in the primary I/O group is a single-slot block-transfer module.

The processor addresses one I/O module

 slot as one I/O group. Concept: The physical address of each I/O group corresponds to an input and output image table word. The type of module you install (8, 16, or 32-point) determines the number of bits in these words that are used. You select 1-slot addressing by setting switches 5 and 6 of the I/O chassis backplane switch assembly: • switch 5 to the ON position • switch 6 to the OFF position With 1-slot addressing, because 16 input AND 16 output bits are available in the processor’s image table for each I/O slot, you can use any mix of 8 or 16-point I/O modules in the I/O chassis.