Watlow Series PD - Manual (Page 168)

Related to the note above go to the PD Module Property page and check Inhibit Module as
shown below.
Once the module has been inhibited insert a message instruction into your program. In the
example logic below the O
ÆT Dynamic Assembly will be increased to allow for the Autotune
feature to be enabled. A value (in this case, 1) will be sent from the controller to the PD to
start the Autotune feature.
In configuring the MSG instruction there are several points of interest that will require
some focus. First, notice that the service type is Set Attribute. The value stored in the
source element (New_Dynamic_Assembly) will be written to the first Dynamic Assembly
Point identified above in section 2.2.4 as Class = 110, Instance = 1, and Attribute = 1. Below,
these values are shown on the configuration screen in Hex.
Figure 4.0a
Figure 4.0b
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