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How do I set up tags to receive weight data over Ethernet IP?

Last updated 02/04/2015 11:17 AM

Question

How do I set up tags to send commands to the controller and receive weight data from my Hardy Instrument over Ethernet IP?

Answer

The Ethernet IP communications to your HI 3010, HI 3030, HI 3300, HI 3600, HI 4050 or HI 4060 should be through the I/O tables set up when you configure the controller into the I/O configuration of the Control Logix program. These tables will be up to 125 words (16 bit integer) long. Once you get communications established, these tables will be transferred each scan.

The data to be sent to the processor from your HI 3010, HI 3030, HI 3300, HI 3600, HI 4050 or HI 4060 will need to be "Mapped" into the Ethernet IP table in the unit. This is done through the mapping pages when you get online with the browser built into the unit through the TCP/IP Ethernet port. You, the user, decide what data will be transferred, in what format, and in what location in the Ethernet I/P tables.

On these mapping pages the user will also determine and "Map" where the input data from the processor will be placed or used in the unit. Example: You may decide to "map" the gross weight into the Ethernet IP output table as an integer in word location 3. The PLC would then receive the gross weight, in integer format, in word 3 of the I/O table for the unit. You may "map" that the input word 2, bit 0, of the Ethernet IP table will zero the gross weight. So, now the PLC can read the gross weight from the I/O table for our unit and you can set bit 0 of output word 2 to cause the unit to run the zero command.

There are no specific tags that need to be made. Any tags you desire to make to either store collected data from the unit or if you set them up to transfer data to the unit as a group, is up to you.  So, you may set up a tag called "gross weight" and copy the reading from word 3 (example above) into this tag for use within the program, or you can just use the value straight from word 3. This would be up to you.