Process Instruction Type 
Definition
Process instruction types are keys that have been define in Customizing for Process Management and that you must specify when you create a process instruction category. You use the process instruction type to determine which functions are to be supported in the process instruction category. Depending on whether the process instruction category is defined for the PI sheet or a process control system, you must use the corresponding process instruction type.
Use
There are eight different process instruction types. Which type you can use, depends on different criteria.
The type is used to distinguish:
Where the information defined in a process instruction is transferred:
To a process control system
To the browser-based PI sheet
Which functions the process instruction is to support. This means, for example, if you want to transfer information to production control or if you want to request information from production control.
For information processing by process control systems , you can use the following process instruction types:
Type 3: process message subscription
For examples of process instructions for a process control system, see Process Instruction Structure .
For information processing using the PI sheet , you can use the following process instruction types:
For examples of process instructions for the PI sheet, see Process Instructions for the PI Sheet .
