61
Figure 47: Controller Tags for I/O Access
We can directly interact with these tags in order to control and monitor the inverter. In Figure 47,
for example, we can see that the first 16-bit word of output data (Interface_Card:O.Data[0]) has
been set to a hexadecimal value of 0x0001. The default consumed data word configuration word
offset 0 references parameter 00.02, which is the inverter’s run command. A value of 0x0001,
therefore, means that the FWD (run forward) bit has been turned ON.
Similarly, we can see that the second 16-bit word of output data (Interface_Card:O.Data[1]) has
been set to a decimal value of 3558. The default consumed data word configuration word offset 1
references parameter 00.04, which is the inverter’s frequency command. A value of 3558,
therefore, equates to a frequency command of 35.58Hz.
The input data from the inverter shows similar expected results. Values of 1 and 3558
corresponding to parameters 01.04 (rotation direction) and 01.01 (output frequency), respectively,
are consistent with the inverter running at the parameters commanded by the output tag.
9.2.12.1
ControlLogix Example: Generic Default I/O Add-On Instruction
The generic default I/O add-on instruction is a simple interface to command and monitor the inverter. It is
based on the vendor-specific assembly instances 100 & 150 and the default produce and consume data
configuration (refer to section 9.2.4). The add-on instruction is optional and provided for user
convenience.
1)
Complete all the steps in section 9.2.12.
2)
Right click on “Add-On Instructions” in the
controller organizer view and select “Import Add-
On Instruction”. Browse and import the generic
default I/O add-on instruction. Refer to Figure 48.
3)
Double click “Controller Tags” in the controller
organizer view and select the “Edit Tags” tab at
the bottom.
4)
Create the tags in Figure 49.
Figure 49: Create Generic Default AOI Tags
Figure 48: Generic Default IO Add-On
Instruction