FANUC Robotics America GFK-1535A - Manual (Page 42)

3-2 VersaMax™ System Genius® Network Interface Unit User's Manual – November 2000 GFK-1535A
3
NIU Data Memories
All of the data for the I/O station utilizes the NIU's four I/O data memories.
The NIU has 128 bytes of memory available for each of the four types of data
(discrete inputs and outputs, data types I and Q, and analog inputs and outputs, data
types AI and AQ). During NIU configuration, data for individual modules is
assigned to specific areas of this memory.
NIU Memory
Type
Typically Used For Amount
Available in NIU
I discrete inputs, and status data from intelligent modules
(each byte contains 8 input points) 128 bytes
Q discrete outputs, and fault clearing for intelligent modules
(each byte contains 8 output points) 128 bytes
AI analog inputs (requires 2 bytes per channel) 128 bytes
AQ analog outputs (requires 2 bytes per channel) 128 bytes
Data always starts at the beginning of each table.
Each table starts at 1 internally. The combination of analog channels and discrete
points must not exceed 128 bytes for inputs and 128 bytes for outputs.