Lenze i550

Engineering Tools
25 | P a g e L e n z e i 5 5 0 A c t u a t o r S p e e d A O I
4 Appendix
4.3 Creating an Explicit Message Handler AOI
4.3.1 Description of the Message Handler
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4.3.1 Description of the Message Handler
This AOI is made to send values to several i550 drive parameters. All these parameters are listed
directly on the AOI after inserting into the ladder logic routine, and the values can be directly typed
in there. Values can also be assigned from the logic (either from values or from other tags), as shown
in Rung 1 of the example code below (Figure 30). These assignments will take priority over any
typed directly into the AOI.
In order to execute the parameter settings for the i550, the i550ExplicitMSGHandler requires a TRUE
signal at the input xSend of the AOI. At this signal, one by one the AOI will assign values for the
Message Instance, Attribute, and Source Length, as well as output Value_Out, for each i550
parameter. These values will change 11 times in total, for the 11 parameters that are being sent.
The values are passed through the MSG_Out tag to the external Message instruction that is linked
to the AOI (ExpMessageTest in this case). When all 11 messages have been sent, the xDone output
bit of the AOI will change to TRUE. The AOI will only send the messages one single time, and
requires a new FALSE to TRUE edge signal at the xSend input to execute again. See sections Error!
Reference source not found. for the creation of this AOI.
Figure 30: Example ladder logic for i550ExplicitMSGHandler