User`s manual

Watlow EZ-ZONE™ Communications • 10 • Chapter 2 Mobbus RTU & TCP
In the example logic below a message instruction is configured to write a new parameter to the first mem-
ber of the Assembly Definition Addresses.
Figure 2.9
Figure 2.8
Because each of the assembly definition addresses and working registers are 32-bits it is necessary to set
this instruction to write to multiple registers, in this case 2. Within figure 2.8 we see an inset image that
reflects what is being written to the PM (N11:12 = 1328 and N11:13 = 0). When the MSG instruction is exe-
cuted it will redefine the nineteenth assembly parameter of the PM as Digital Input 5 State . The logic shown
above can be used to change any of the assembly member definitions simply by changing the value of N11:12
to the desired parameter and then the MB Assembly Definition Address (pointer) to the desired member.
So, looking at figure 2.9 we can see that if a MSG instruction is configured to read register 40237 that it will
now contain the current state of digital input 5 (DI5). After the MSG instruction is executed we see that DI5
is currently in the Active state (5). As was the case in the previous example, the logic shown above can be eas-
ily changed to read or write any of the configured parameters simply by changing the data table address and
the MB data address to the desired values.