The ProcessWorkingUnitType (see Figure 14) provides an instance of a unit which is part of the forming and / or production process and is formally defined in Table 17.

Figure 14 – ProcessWorkingUnitType

Table 17 – ProcessWorkingUnitType Definition

Attribute	Value
BrowseName	ProcessWorkingUnitType
IsAbstract	False
References	Node Class	BrowseName	DataType	TypeDefinition	Other
Subtype of the 8:WorkingUnitMonitoringType defined in REF OPC40501_1 \h OPC 40501-1 Machine Tools
0:HasComponent	Object	<ProcessValue>		7:ProcessValueType	OP
0:HasComponent	Object	<CyclicProcessValue>		CyclicProcessValue Type	OP
0:HasComponent	Object	4:MachineryItemState		4:MachineryItemState_ StateMachineType	M
Conformance Units
MetalForming ProcessWorkingUnitType

<ProcessValue> describes the monitoring of a signal from the corresponding working unit. Since there are more than one monitoring signals available per working unit, the 7:ProcessValue is defined as an optional placeholder. The 7:ProcessValueType is defined in OPC 40001-2.

<CyclicProcessValue> is of type CyclicProcessValueType, which is a subtype of 7:ProcessValueType and is representing process values and a transactional context between the 6:AnalogSignal, 7:ProcessValueSetpoint and the actual cycle count of the last cycle. The CyclicProcessValueType is formally defined in 7.2.

4:MachineryItemState represents the current state of the working unit.