The UNI-I/O model UIA-0800NH offers 8 analog channels that support HART communication.
In order to communicate with an end device that supports HART, select the Uni-IO module UIA-0800NHselect the Uni-IO module UIA-0800NH in Hardware Configuration.
You can implement HART messaging via the HART ladder functions Build Hart Command, Send HART Command, and Parse HART Message.
Build HART Command
Use this function to build commands.
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Parameter Name |
Purpose |
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A |
HART Command number |
Link a tag to provide the command number |
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B |
Manufacturer ID |
Will be ignored for command 0
|
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C |
Device Type |
Will be ignored for command 0 |
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D |
Device ID |
Will be ignored for command 0. Must be of size 3. |
|
E |
Data Buffer |
The command’s data. Can be left empty for commands without data. |
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F |
Data Size |
The number of bytes in the data buffer |
|
G |
Buffer for HART Command |
The generated command is stored in this buffer. Note that the buffer's length must be big enough to hold the command. |
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H |
Buffer Size |
The number of bytes in the generated command |
Send HART Command
Use this function to send commands to the module.
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|
Parameter Name |
Purpose |
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A |
Hart I/O module |
Click to see all modules supporting HART defined in your Hardware Configuration. |
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B |
Analog Input Number |
Select the desired input on your selected module. |
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C |
Buffer Hart Command |
Select the buffer you created to send commands |
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D |
Number of Bytes to Send |
This determines the number of bytes that will be sent from the buffer |
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E |
Buffer Received Data |
The data received from the module is written into this buffer |
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F |
Buffer for HART Command |
The number of bytes received from the module |
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G |
Data Arrived Bit |
0=data has not arrived 1=data arrived |
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H |
Status |
2 BUSY 0 READY -1 TIMEOUT ERROR -2 HART COMMAND INVALID IO ADDRESS -3 USER PARAMETERS ERROR -4 HART COMMAND IO BUS MSG SIZE ERROR -5 HART COMMAND USER RX BUF OVERFLOW -6 MEMORY ERROR -7 HART COMMAND RX BUF OVERFLOW -8 SYS FUNC ERROR -9 WAIT TO REPLY |
Parse HART Command
Use this function to send commands to the module.
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|
Parameter Name |
Purpose |
|
A |
Hart Message Buffer |
The buffer that contains the HART message |
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B |
Command Number |
Select the desired input on your selected module. |
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C |
Manufacturer ID |
Will only be written to if command number is 0
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D |
Device Type |
Will only be written to if command number is 0 |
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E |
Device ID |
Will be ignored for command 0. Must be of size 3. |
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F |
Response Code |
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F |
Data Buffer |
The number of bytes received from the module |
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G |
Data length |
The number of bytes in the messages' data buffer |
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H |
Data Buffer |
Command's buffer |