Rockwell Automation 2706-PRIO_PDH485_PDHP_PDNET_PCNET_PENET_PENET1 InView Communication Module User Manual - Manual (Page 68)

Publication 2706-UM017C-EN-P - March 2006
4-18 Application Guide
• Variable Array Size: The size of the array (16 to 80 characters for
DHP) containing the variable data. The maximum array size is
dependent on the controller and must be an even integer.
The address tags are either an Integer (N) or ASCII (A) data file. Both
the Message Trigger and Message Data addresses must fall entirely
within a single 80 byte block, including the Message Data array size.
You can choose to use either an Integer or ASCII data file, you cannot
use more than one data file. For example, a Message Trigger address
of N7:0 and a Message Data address of N9:0 is not valid. At the same
time, a Message Trigger address of N7:0 and a Message Data address
of N7:35, with a Message Data array size of 16, is not valid because
the array falls outside of the 40 word (80 byte) block.
SLC 5/04 Controller
DH+ Communication Setup
IMPORTANT
Variable Trigger and Variable Data addresses work
the same as Variable Array Size.