User`s manual

Watlow EZ-ZONE™ Communications • 9 • Chapter 2 Mobbus RTU & TCP
Figure 2.6
As stated previously, the assembly structure is a group of 40 pairs of addresses. The value in each of these
addresses serves as a pointer to a parameter within the PM. Each of the 40 pairs of assembly definition ad-
dresses are displayed in figures 2.0 - 2.3. In figure 2.7 below, N11:100 through N11:179 shows the factory
default values after the MSG instruction is enabled and executed without error. Notice this is a read message
reading the assembly structure from the PM and then depositing it into PLC registers N11:100 - N11:179.
Figure 2.7
Searching this manual for “Operations Page” and then looking for the “Analog Input 1 Process Value” you
will see that the Modbus address is defined as 360. Looking at figure 2.2 you will see that the 21
st
pointer
points to the “Analog Input 1 Process Value” and this can be seen as well in the above graphic (N11:140 &
N11:141) which represents the assembly read-back from the PM control in the default state.