Process Instruction Structure 
Process Instruction Structure
Use
Which process instruction types you can use and how you create their characteristic structure depends on the control recipe destination (that is, PI sheet or process control system) that processes them. Process instructions for process operators need to contain different information than process instructions for process control systems, which in turn differ depending on the functionality offered by the control system.
For more information on the type of information you can pass on to a process control system and the R/3 PI sheet using process instructions, see
Process Instructions.Features
Process Instructions for Process Control Systems
You can use the following process instruction types:
The following paragraphs describe one possible way of using these process instruction types to control and monitor material consumption in a specific control scenario.
In Customizing for Process Management of the standard system, you will find further examples of the process instruction categories for process control systems. The names of these instruction categories start with
A .Type 1: process parameter
Before production starts, the process control system needs information on the materials and the material quantities to be charged. Let us assume that this information is not defined in the process control system. In this case, it can be sent to process control in the form of process parameters. In the process order, you can use automatic assignment of characteristic values to transfer the information about the material contained in the material list to the process parameter.
Example: Process Parameter for a Process Control SystemType 2: process data request or type 3: process message subscription
During production, information on the actual material quantities consumed needs to be reported to process management. In principle, this information can be requested in one of the following ways:
Since the control system needs information about the structure of the message to be sent, your process message subscriptions and process data calculation formulas must contain the category of the message to be sent as well as the names of the characteristics to be contained in the message.
To create the requested process messages, the process control system generally also needs information on a number of characteristic values that are only stored within PP-PI:
Example: Process Data Request for a Process Control System
Example: Process Message SubscriptionProcess Instructions for the R/3 PI Sheet
The R/3 PI sheet, is one possible tool that process operators can use to carry out process instructions. The following sections describe which process instruction types you can use for the R/3 PI sheet and how you must structure the process instructions.
How much you need to know about the characteristic structure of the individual process instruction types depends on the function you use to create and change your process instructions (see
Manual Process Instruction Maintenance ):
Note that at present you cannot use the process instruction assistant to define process instructions of Type 0: Universal process instruction category.In Customizing for Process Management of the standard system, you will find examples of process instruction categories of all types described here.
For more detailed information about the process instruction types that you can use for the R/3 PI sheet, see
Process Instructions for R/3 PI Sheets.