plc for cryotrap control test (ct²). prior status (vtf) (9/2/2012)
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PLC for CryoTrap Control Test (CT²)
Giulio Ballardin for Software GroupMeeting 27 April 2012
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Prior Status (VTF) (9/2/2012)
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Present Status (1500 North)
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PLC + Software costs
• PLC: Seneca Z-TWS3-C 570 €• ZC-24DIN 138 €• Z-10-DOUT 79 €• Software Codesys 0 € • Software Z-Net3 (Seneca) 0 €_______________________________________Total 787 €For more information: http://www.seneca.it
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Deadlines
As declared in the precedent presentation, we finished our work at the end of March 2012.
During this month, we added a new manual pump (V2), and we tested again all the system at 1500 North.
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Comunication
• We use the Linux library libmodbus v3r0p1
MODBUS TCP-IP
ModBus RTU
Tango
Linux (SL)
Windows
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CryoTrap Scheme
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ArchitectureThere are tree architecture/security levels:• Electronic (for more info R. Cavalieri)• PLC• Software (Tango: Martin Mohan)
PLC
Software
Electronic
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WEB Interface
The Z-TWS3-C is also a WEB server. So it was possible build a WEB UI to test CryoTrap control system at low level.
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WEB Interface
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Problems
• Initially I found some problems in using both PLC and ZC-10DOUT. These problems were solved with Seneca’s help.
• There is a problem with the web user interface. The memory usage of Jave (TM) increases until the browser freezes after an hour. I’m investigating this problem.
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Possible improvements
• Add a A/I Module to read the operating frequency of Turbo pump.
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What is necessary for the installation at Nikhef?
1)If you want to connect the Control System to the Internet:
• IP address for PLC (mandatory)• IP address for TANGO machine (mandatory)• A Linux account in a machine at Nikhef
reachable from Cascina (optinal)2) You can connect the laptop running Tango
directly to the PLC.
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