Several PackTags have specific values defined.

This describes the set point for the current speed of the unit/machine in primary packages per minute. Keeping speed in a primary package unit of measure (UOM) allows for easier control integration. The primary package UOM is the normalized rate for the machine, normalized to a value chosen on the line.

The following example is for a bottle line running at balance line speed of 1000 packages/minute. The UOM chosen is equivalent to be the actual count of the Filler, or Labeler.

Machine	Actual Pack Counts	Primary Packages (UOM)
Bulk Depalletizer	41.667 (24 pack => 1000/24 = 41.667)	1,000
Filler	1,000	1,000
Labeler	1,000	1,000
Packer	66.667 (15 pack => 1000/15 = 66.667)	1,000
Bulk Depalletizer	41.667 (24 pack => 1000/24 = 41.667)	1,000

Indicates materials are ready for processing. It is comprised of a series of bits with 1 equalling ready or not low, 0 equalling not ready, or low. Each bit represents a different user material. The word contains bits that indicate when a critical material or process parameter is ready for use. It can also be used for production, and/or indication of low condition. This information may be sent to the unit machine at any time as the interlock information changes.

The format and meaning of the material interlock bits are determined by the machine/unit supplier, as shown in the example below:

Machine/Unit	Material Interlock Bit #	Material Description
Filler	0	500 ml Bag
Filler	1	Flacked Cereal
Labeler	0	Small Box
Labeler	1	500 ml Bag
Labeler	2	Small Box Label

An array of structure elements used for coordinating upstream or downstream machines in a cell with multiple unit machines.

The array is a length that is equal to the number of machines that will be sending commands. This could be expanded if a machine is capable of receiving material from multiple upstream and/or downstream machines, thereby receiving multiple commands and parameters.

This can be used for machine to machine coordination without supervisory control, or for tightly controlled units under supervisory control. These tags are typically used for consumption within the unit machine procedure. Specifically, if a remote controller was issuing commands, the commands would be read by this tag and used in the unit machine.