Comparison: Commreq Vs Data_Init_Comm - Emerson PACSystems RX3i User Manual

User manual
GFK-2892G
Figure 35: Data_Init_Comm to Clear Circuit Fault
6.3.5

Comparison: COMMREQ vs Data_Init_Comm

Data_Init_Comm is an instruction designed to help programmers set up COMMREQs.
Note that when programming a COMMREQ (Figure 34), the entry for Address+3 is one less
than the intended beginning address for the Status Block. When programming a
Data_Init_Comm (Figure 35), the entry for Address+3 is the actual intended memory
location for the beginning address for the Status Block.
This difference applies to all command blocks detailed in the following sections 6.4.1 - 0. If
the COMMREQ requires "n" for the Status Block location, the equivalent Data_Init_Comm
will require "n+1" in its Address+3.
Also note that the pop-up window presented in Data_Init_Comm (as shown in Figure 35),
allows the user to scroll through the parameters of the command. This is especially useful
where the command has multiple parameters.
COMMREQ/Data_Init_Comm Programming
Chapter 6
Sep 2019
63