Chapter 3 Example Applications
FieldPoint FP-3000 User Manual 3-10
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National Instruments Corporation
Bring the Block Online
1. Go to the MODE_BLK parameter of the Resource block and set the
TARGET to Auto.
2. Go to the MODE_BLK parameter of the block you created and set the
TARGET to Auto.
3. Re-read the MODE_BLK parameter. The ACTUAL field should go to
Auto. If it does not, refer to AppendixC, Fieldbus Parameters, for
more information.
Once the block goes to Auto, it is fully operational. You can look at the
value of OUT and see the temperature reading from the thermocouple in
degrees Celsius. The temperature reading is ready to be used for control.
If you are only interested in taking thermocouple readings and not
interested in closed loop control, you are finished with this example.
Controlling a Heating ElementInstantiate an FP-AO-200 Block
Instantiate an I/O block for the FP-AO-200 channel to control the heating
element. Since the heating element is connected to an FP-AO-200 module,
you must create an FP-AO-200 block. To instantiate an I/O block, follow
these steps:
1. Right-click on FP-3000 in the configurator.
2. Select Instantiate New Block. This causes a dialog box to appear that
lists all of the blocks supported by the FP-3000 and allows them to be
instantiated.
3. Select FP AO 200 Block from the list, then click on the OK button.
Assign a Tag to the New Block
By default, new blocks are created without a tag. To assign a tag, follow
these steps:
1. Right-click on the new block, then select Set Tag.
2. Enter the tag you choose in the dialog box. The tag can be up to
32characters in length and should not contain the dot (“.”) character.
3. Click on OK.