High-End Pressure Controller
CPC8000
Operating Instructions - CPC8000
85
8. Remote Operation
8.1 Software/Functions
When the instrument is turned on it takes about 30 seconds to complete the initialization. The BIOS
routines test the system CPU board, then the operating system. The system will go through software and
hardware initialization. The following hardware/software is initialized:
Transducers: The system is scanned for installed transducers and all operating transducers are initialized.
The transducer(s) RAM data is transferred to system RAM where appropriate.
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GPIB: The GPIB board is initialized as a talker/listener.
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Units: The scale factors for percent full scale and counts are calculated.
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Serial: The external serial port is initialized.
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Valves: The pressure control algorithm is initialized.
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Options: Any optional hardware/software is initialized.
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Interrupts: Interrupt vectors are loaded and enabled.
After initialization, the program enters a polled loop.
The proprietary calibration constants and current settings are stored in a non-volatile device.
8.2 Remote Command Set
This remote command set is the default set available on the CPC8000. All commands must be
terminated with a <CR> and/or a <LF>.
A query command ends with a ? for queries. The data column represents the response of the CPC8000.
All response strings begin either with a space character or an “E” representing that there is an error in the
error queue. All response strings are terminated with a <CR> and a <LF>. The error queue holds the last
10 errors identifed.
Pressure readings are returned in exponential notation in a format according to the OUTFORM command
as follows:
1. <sp> pressure value <cr><lf>
2. <sp> pressure, units number, mode <cr><lf>
3. <sp> pressure, pressure rate <cr><lf>
4. <sp> pressure, minimum peak, maximum peak<cr><lf>
5. <sp> pressure, active sensor (P or S), active turndown (1-4)<cr><lf>
6. <sp> pressure, control point, “stable” or “slewing”<cr><lf>
7. <sp> pressure, “no barometer” or baro reading <cr><lf>
For all commands (no ?), the data column represents the required parameters to be sent to the CPC8000
following the string in the command column. Any command that requires multiple parameters must have
the parameters separated by commas.
Summary of Contents for CPC8000
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