Operation
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8.2
Process description
8.2.1
MES-Mode
Start conditions
•
The station has been mounted and adjusted correctly.
•
The distance sensors are set correctly towards the workpiece to be tested.
•
All required connections have been established in conformity with the safety regulations.
•
The power supply of the station is switched on.
•
The system programs of the PLCs and of the HMI of the station are loaded.
•
The PLCs are in the Run mode and the run time of the HMI has been started.
•
The automatic mode is activated.
•
The MES-system has been started and is connected with the PLC of the station.
•
A work schedule has been set up in the MES-system where the station Measuring is contained and
parametrized.
•
There is an order in the MES-system containing the execution of the work schedule.
•
The MES-mode of the station Measuring is activated.
Process description
1.
The prepared order is started in the MES-system.
2.
A free carrier is assigned to the order.
3.
The carrier runs through all stations defined in the work schedule until it will reach the station
Measuring. The transponder of the carrier contains now the current order data for the station Measuring
where the differential measurement shall be taken.
4.
There is now a pallet and a front cover on the carrier. The front cover points with its inside upwards. The
drill hole of the front cover is on the left (view to control cabinet).
5.
At the stopper position, the carrier is recognized by the PLC of the station Measuring via an inductive
proximity switch.
6.
The transponder of the carrier is read out by the PLC of the station with the RFID-read-write head. If the
reading was not successful, the carrier is released by the stopper and transferred to the next station.
Furthermore, an error message is displayed at the HMI of the station.
7.
If the reading was successful and the CP application module Measuring is ready to start, the PLC of the
station sends an enquiry to the MES system on the basis of the read RFID data for a station-specific
order for the carrier. If the CP application module Measuring is not ready to start, the carrier is released
by the stopper.
8.
In case there are order data existing, the MES-system transfers them to the PLC of the station.
If not, the carrier is released by the stopper and transferred to the next station.
9.
The order data record of the MES-mode contains order number, order position, part number, resource
number and operation number as well as the parameters of the operation to be executed.
The parameters of the CP application module Measuring are: setpoint measured value of difference,
upper limit value and lower limit value. The setpoint measured value of difference is only used for the
display on the HMI.
10.
Then the PLC of the station sends an enquiry to the MES system for the URL, a station-specific website,
on the basis of order number and order position. On this website, any order-specific operating
instructions can be displayed at the HMI by the MES system, e.g. for the worker guidance at the manual
workplace.
Содержание CP-AM-MEAS
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Страница 20: ...Basic safety instructions 20 Festo Didactic 8154245 en 4 11 CE Declaration of Conformity ...
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