# 7 years ago
Faissal M	HI i have a problem after i clone PyPLC device server when i want to run this device it shows me an error i dont know what to do ? Attachments: 100Kb

# 7 years ago
Andy	what error do you get? How did you clone the device server?

# 7 years ago
sergi_rubio	Hi Faissal, We would need a bit more of information to solve the issue. Try my latest version of PyPLC from github and paste here your errors: https://github.com/sergirubio/PyPLC/ Sergi Rubio Keep on dancing, http://www.tango-controls.org/resources/howto/how-fandango/ Edited 7 years ago

# 7 years ago
Faissal M	when im wiring the plc i configure the plc modbus communication therefore i configure the ip of my pc when i run the device server ,the state attribute shows me "unknown", it didn't recognize the plc. Edited 7 years ago

# 7 years ago
Faissal M	Hi Andy ,Sergio i clone the device server with 'git clone' command from the github. when i call the init method the terminal shows me this instruction : ModbusMap> Wrong Definition!:%s2 Edited 7 years ago Attachments: 61Kb

# 7 years ago

sergi_rubio

Defining ModbusMap property is not required unless you many variables to read (>50). Try first by reading 10 registers from your Modbus device (e.g. PyTango.DeviceProxy('your/modbus/device').ReadHoldingRegisters([0,10]) ) and then create an attribute returning this same values: DynamicAttributes: ARRAY=DevVarLongArray(ReadHoldingRegisters([0,10])) Regarding Modbus with siemens (which I never tried before), I answered in the other thread: http://www.tango-controls.org/community/forum/c/development/python/pyplc-communication-with-siemens/?page=1#post-2397 Keep on dancing, http://www.tango-controls.org/resources/howto/how-fandango/

# 6 years ago

Remotie

Hi Sergio, Thanks for this thread. I have a issue when creating new PyPLC DS instance, i've got these errors: tango-cs@tango9-vm:~/Downloads/PyPLC-master/PyPLC$ python PyPLC.py PLCtest Failed to import EventChannelFactory notifd/factory/tango9-vm from the Tango database Applying FullTangoInheritance from <class '__main__.PyPLC'> and <class 'fandango.dynamic.DynamicDS'> Updating PyPLCClass from DynamicDSClass Updating PyPLCClass.attr_list from DynamicDSClass Updating PyPLCClass.class_property_list from DynamicDSClass Updating PyPLCClass.cmd_list from DynamicDSClass Updating PyPLCClass.device_property_list from DynamicDSClass In DynamicDS.CreateDynamicCommands(PyPLC/PLCtest) class = PyPLC; classes = ['dserver/PyPLC/PLCtest', 'DServer'] devs = [] Out of DynamicDS.CreateDynamicCommands(PyPLC/PLCtest) In DynamicDSClass.__new__(<class 'fandango.interface.inheritance.PyPLCClass'>): updating properties DynamicSpectrumSize property NOT found in database In PyPLCClass constructor In DynamicDSClass.dyn_attr([]) In DynamicDSClass.__new__(<class 'fandango.interface.inheritance.PyPLCClass'>): updating properties DynamicSpectrumSize property NOT found in database In PyPLCClass constructor Segmentation fault (core dumped) tango-cs@tango9-vm:~/Downloads/PyPLC-master/PyPLC$

# 6 years ago
sergi_rubio	Is it the first time you launch this device or it was running already in the past? Segmentation fault at startup may occur if you have configured a polling period for an attribute that has been later renamed or removed. Is that the case? Sergi Keep on dancing, http://www.tango-controls.org/resources/howto/how-fandango/

# 6 years ago
Remotie	Hi Sergi, it's the first time. Regards

# 6 years ago
sergi_rubio	… could you try to generate a corefile and paste here the backtrace? > ulimit -n 99999 > … run PyPLC and generate a "core" file after the segfault > gdb -c core -f /usr/bin/python #> bt If you can paste here the contents of your PyPLC properties (hiding IP's) I can crosscheck if everything is ok. Keep on dancing, http://www.tango-controls.org/resources/howto/how-fandango/ Edited 6 years ago