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Measurement#

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This task is intended to fully integrate with the Weigh & Dispense functionality of the MES. It is responsible for collecting measurements and send them to the MES.

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Inputs#

Name Data Type Description
entity Entity Type Entity that we want to collect the measurement
isStable Boolean Flag indicating the received value is stable
value Any Value that is measured
Activate Any Activate the task

Outputs#

Name Data Type Description
onSetup Object Emits the contents received when an OnSetup message is received
onStart Object Emits the contents received when an OnStart message is received
onStop Object Emits the contents received when an OnStop message is received
Success Boolean Triggered when the task is executed with success
Error Error Triggered when the task failed for some reason

Settings#

On the General tab, you have the usual settings and the following settings:

Name Data Type Values Default Description
AutoActivate Boolean true Auto subscribes to the subjects specified in the Setup Instrument, Start Measuring, Stop Measuring.
Instrument Type Enum Other
Scale		 Other If the option chosen is Scale, it will add the fields tareValue and tareIsSetto the input fields, it will also add the fields resetTare and setTareto the output fields
Entity EntityType Resource Entity Type associated to the measurement
Instance EntityType Instance of the specified Entity Type
Setup Instrument String Displays the subject expected for the setup device message
Start Measuring String Displays the subject expected for the start device message
Stop Measuring String Displays the subject expected for the stop device message

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On the Inputs Tab you have the following setting:

Name Data Type Default Value Description
Name String Input Name
Property Name String Property Name
Type Long
Decimal
DateTime
Boolean
String
Integer		 The type of input value.
Collection Type None
Array
Map
Default Value any The default value of an input parameter.

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On the Outputs Tab you have the following setting:

Name Data Type Default Value Description
Name String Output Name
Property Name String Property Name
Type Long
Decimal
DateTime
Boolean
String
Integer		 The type of output value.
Collection Type None
Array
Map
Expression any The operation you wish to apply to the input.

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Behavior#

This task is responsible for sending measurements to the MES, via message bus. It has defined static subjects, using the instance id and uses them to publish in the message bus. It is also subscribed to those subjects, so the communication with the MES is bi-directional.

When the task receives an input entity it will subscribe to all the message bus subjects (start, stop and setup) of that entity instance. If the task receives an activate as true, the task will try to subscribe to the entity defined in the settings, if the activates is a false it will unsbscribe. When the task receives a value, it will publish it to all the active subjects.

Remarks#

There is no particular remark to be made.