CryoConTempController

README

b"This device server is used to control basic features of a CryoCon temperature\ncontroller.\n\nIt has been tested with M32 and M24C models, but should work with other models.\n\nThe SCPI syntax for controlling the instrument is very similar to that for\ncontrolling a temperature monitor, and hence these functions have been shared\nwith the CryoConTempMonitor project. These common functions are in CryoCon.py\nfile (this file should be exactly the same in both projects CryoConTempMonitor\nand CryoConTempController). Of course the temperature controller has many\nfunctions that the monitor doesn't contain, but simply these functions are not\nused in the temperature monitor code.\n\nA possible bug was detected on model M24C, and a mail was sent to CryoCon, but\nunfortunately I got not answer from them. To face this possible bug I had to\nmodify the device server to allow transient error answer from the instument\nThis is the mail I sent:\n***********\nHi,\n\nMy name is Jairo Moldes. I'm working as a software engineer at Alba \nsynchrotron in Spain. One of the end stations of the beamline I'm working on \ncontains a CryoCon M24C temperature Controller.\n\nWe have developed our own software which uses the serial for communicating \nwith the instrument. I have detected that sometime the answer to the command \n'CONTROL?;:SYSTEM:LOCKOUT?;' is incorrect (I didn't check if this happens with \nother commands). The answer sometimes contains a 'NACK', like for example: \n'NACK\r\n' or 'ON ;NACK\r\n'\n\nThe problem can be reproduced with the attached python code (you probably need \nto customize it). When I run it, after a random number of loops (it may take \nvery long) it finally fails. Note that the baud rate is set to 19200.\n\nHave you detected this problem? If so, which is the solution? If not, can you \nreproduce it?\n\nThanks in advance. Regards,\n***********\nAn this is the m24.py test script:\n#!/usr/bin/env python\n\nimport time\nimport serial\n\nif name == 'main':\n ser = serial.Serial('/dev/ttyS0', 19200, 8, 'N', 1, timeout=1)\n cmd = 'CONTROL?;:SYSTEM:LOCKOUT?;'\n answer = 'ON ;ON'\n while True:\n try:\n ser.write(cmd+'\n')\n time.sleep(0.5)\n line = ser.readline()\n print '%r' % line\n if line.strip() != answer:\n print time.ctime()\n ser.close()\n break\n except Exception, e:\n print e\n ser.close()\n*************\n"