In the past, machine tool builders typically provided legacy interfaces defined by leading customers in a similar way. Often these interfaces were quasi-standardized as they were integrated in the PLC libraries of the leading control manufacturers. The signal names were often the same.

The following table gives an overview how the standardized variables of OPC 40501-1 could be mapped to these legacy signals.

Legacy Signal

Variables defined by OPC 40501-1 v1.00

Additional variables defined by OPC 40501-1 v1.01

Number of total parts

(Not identical to legacy signal) ProductionStatisticsType/ PartsProducedInLifetime

ProductionJobType/ PartsCompleted

Number of good parts

(Not identical to legacy signal) the information to each part ProductionPartType/ PartQuality

ProductionJobType/ PartsGood

Number of scrap parts

(Not identical to legacy signal) the information to each part ProductionPartType/ PartQuality

Can be calculated directly from

ProductionJobType PartsCompleted

minus

ProductionJobType PartsGood

Production

ChannelMonitoringType/ ChannelMode

ProductionType ActiveProgram/ CurrentState

ChannelMonitoringType/ FeedOverride

ChannelMonitoringType/ ChannelModifiers

MachineryItemState_StateMachineType/ CurrentState= Executing

AND

MachineryOperationModeStateMachineType/ CurrentState= Processing

Note:

The FeedOverride may also be included.

Motors OFF (Energies OFF)

(Not identical to legacy signal) MachineryItemState_StateMachineType/ CurrentState= OutOfService

Override >=70 to 99

Override >= 100

Override = 0

Override = 100

ChannelMonitoringType/ FeedOverride

as absolute value

Active Program Number

ProductionActiveProgramType/ Name

Automatic Mode

MDA Mode

JOG Mode

ChannelMonitoringType ChannelMode

Start is active

Stop is active

ProductionActiveProgramType/ State/ CurrentState

Spindle running

SpindleMonitoringType/ IsRotating

Program stop in reason of a programmed stop

ChannelMonitoringType/ ChannelModifiers/ OptionalStop

Program aborted in reason of a failure

(incomplete) ProductionActiveProgramType/ CurrentState= Aborted

ProductionActiveProgramType/ CurrentState= Aborted

AND MachineryItemState_StateMachineType/ CurrentState= Processing

AND

MachineryOperationModeStateMachineType/ CurrentState= Processing

Program interrupted in reason of single step

Monitoring/ ChannelModifiers/ SingleStep

Error in general

Occurrence of any Alarm with Severity >= 667

MachineryItemState_StateMachineType/ CurrentState= OutOfService

Technical breakdown

MachineryItemState_StateMachineType/ CurrentState= OutOfService

AND

MachineryOperationModeStateMachineType/ CurrentState= Processing

Organisation breakdown

MachineryItemState_StateMachineType/ CurrentState= NotExecuting

AND

MachineryOperationModeStateMachineType/ CurrentState= Processing