Handbook
November 2011 / 59-UMC0071 / Issue 01
Mercury iTC
Page 6 Original Instructions
6.4.3 To exit the plot ................................................................................................................ 90
6.5 Configuring external interfaces ....................................................................................... 90
6.5.1 Configuring the ethernet interface (if required) ............................................................... 90
6.5.2 Configuring the RS232 serial interface (if required) ....................................................... 91
6.5.3 Configuring the GPIB (if required) .................................................................................. 91
6.5.4 Configuring the USB interface (if required) .................................................................... 91
6.5.5 Enabling remote control of the iTC ................................................................................. 91
6.5.6 Enabling local control of the iTC ..................................................................................... 92
6.6 Re-configuring sensors and heaters .............................................................................. 92
6.6.1 To clear a panel configuration ........................................................................................ 92
6.6.2 Re-configuring a sensor ................................................................................................. 92
6.6.3 Re-configuring a heater .................................................................................................. 92
6.6.4 Re-configuring a control loop ......................................................................................... 92
6.7 Changing control-loop parameters ................................................................................. 93
6.7.1 Entering PID parameters manually ................................................................................ 93
6.7.2 Creating a PID table ....................................................................................................... 93
7 REMOTE OPERATION ...................................................................................................... 95
7.1 Notes on instrument addresses ...................................................................................... 95
7.2 Communication protocols for RS232 and GPIB ............................................................ 95
7.2.1 Commands and responses ............................................................................................ 96
7.2.2 Numeric parameters ....................................................................................................... 96
7.3 Control via ISOBUS ..........................................................................................................96
7.4 GPIB interface ................................................................................................................... 97
7.4.1 Switching between RS232 and GPIB operation ............................................................. 97
7.4.2 Sending commands via the GPIB .................................................................................. 97
7.4.3 Accepting responses via the GPIB. ................................................................................ 98
7.4.4 Status byte and use of a serial poll ................................................................................ 98
7.4.4.1 RQS bit ....................................................................................................................... 98
7.4.4.2 BAV bit........................................................................................................................ 98
7.4.4.3 MAV bit ....................................................................................................................... 98
7.4.4.4 Status byte update rate............................................................................................... 99
7.4.5 Use of the service request line ....................................................................................... 99
7.4.6 Use of the device clear function ..................................................................................... 99
7.4.7 Use of the interface clear function .................................................................................. 99
7.4.8 Non-implemented features of the GPIB ......................................................................... 99
7.4.9 Compatibility with IEEE-488.2 ...................................................................................... 100
7.4.10 Writing a reliable GPIB control program ....................................................................... 100
7.4.10.1 Timeouts................................................................................................................... 100
8 PREVENTIVE MAINTENANCE ........................................................................................ 101
8.1 Six-monthly maintenance .............................................................................................. 101
8.1.1 Cleaning the touch-screen ........................................................................................... 101
8.1.2 Calibrating the temperature-sensor circuits .................................................................. 101
8.1.3 Unscheduled maintenance ........................................................................................... 101
9 TROUBLESHOOTING ..................................................................................................... 103
9.1 Fault-finding features of the iTC .................................................................................... 103
9.1.1 The alarm-logs ............................................................................................................. 103
9.2 Troubleshooting information ......................................................................................... 103
10 COMMAND REFERENCE GUIDE ................................................................................... 105
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