Sigma C4 manual For parameters numbered 0 through

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7.4.5 QF, QFA Query Setup Parameter Value

This command returns the current (SRAM) value of a setup parameter field. QF requests the data to be returned in binary form, QFA requests the data to be returned in ASCII text form. The syntax of the command is:

QFnn<CR><LF>	QFAnn<CR><LF>
(Query for binary)	(Query for ASCII text)

Where nn is a one or two byte ASCII text decimal number of the setup parameter field to be returned.

For parameters numbered 0 through 16:

If QF is used, the value stored for that parameter is returned as a one byte binary value in an ASCII string as follows:

QFnn<space><binary byte><CR><LF>

Where nn is the setup parameter number in 2 bytes of ASCII text decimal (leading zero if required).

If QFA is used, the value is returned in two bytes of ASCII hex in the format 00 in an ASCII string followed by CR/LF as follows:

QFAnn<space>hh<CR><LF>

Where nn is the setup parameter number in 2 bytes of ASCII text decimal (leading zero if required) and hh is the ASCII hex value.

For parameters numbered 17 through 30:

The values returned for parameters numbered 17 through 30 are temperatures expressed as ASCII floating point decimal numbers with one decimal place. Negative values will have a leading minus sign. If the value is a Fahrenheit value, the character “F” will be appended to the end of the string. CR/LF terminates the string. QF and QFA return the same strings for parameters 17 through 30. Format of the returned data is::

QFnn<space>-123.4F<CR><LF>

QFAnn<space>-123.4F<CR><LF>

Note: The values returned by QF and QFA are the values held in SRAM and are the working copy values. These values are originally obtained for Remote mode from the permanent EEPROM values used by Local and Program modes. If any of

C4 Manual Rev 7.5.2

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Contents Sigma Systems Programmable Temperature Controller / InterfaceC4 Manual Rev Table of Contents Intelligent 2 Probe Control C4 Manual Rev C4 Manual Rev C4 Manual Rev C4 Manual Rev Models C4 & CC-3.5Explained IntroductionGeneral Description Release 7.5.2 Firmware Custom Features / Interchangeability WarningC4 vs. CC-3 Differences What’s New Firmware Uploads Forced Start from Prom Firmware Internal Error Shutdown Conditions Intelligent 2 Probe Control Probe Averaging Program Mode Step Insert & Delete RSA Remote Mode Setup Parameter Commands Front Panel Physical DescriptionMode Switch Clear Prog J1 TOP Rear Panel ConnectionsC3-5 Rel General Operation & Error Conditions200 100c 392 148f Startup DisplaysUpdating Firmware Upgrading Firmware by Prom Replacement Making the physical connection for upload Rs load Restoring Setup Parameters to Default ValuesSu res Ee busy and then su doneC4 Manual Rev Fahrenheit Operation P1fP1 lo P1 hi System Operating Temperature RangeProbe Out of Range Shutdown P1 err P1 -err Res err Internal Error Shutdown ConditionsAll res Software Probe Correction Calibration Su errStatus and Error Reporting Fail-safe System C4 Manual Rev Intelligent 2 Probe Control How Intelligent 2 Probe Control functions Preparing for Intelligent 2 Probe Control Using Intelligent 2 Probe Control Displaying Temperature Local Mode Basic OperationS1 nsp S1f nsp S1 102.6 s1fDisplaying and Changing the Setpoint Sp err Sor -sorControlling to a Setpoint C4 Manual Rev 06.0 Program ModeDescription of a Program Step 00.1 Substep Step Data 00.0Ramp time 00.2Maximizing Ramp Speed & Other Ramp Considerations Displaying Program Steps not during execution Clearing Program Memory Reinitializing program stepsInsert Program Step Entering or Changing a Program StepPress CLEAR/ENTRY Press CLEAR/ENTRY Press CLEAR/ENTRY again Delete Program stepRunning Executing a Program Program Run Time Information/Considerations Loop 007 nop2005 sor Sor Special Commands External Compressor On Common Programming Issues C4 Manual Rev EIA-232 Interface Remote ModeIEEE-488 Interface System Information Queries Command Summary by functional groupSystem Information Queries For Celsius mode For parameters numbered 0 through C4 Manual Rev Operation Information Queries & Commands REerror byteCRLF C4 Manual Rev Qccrlf PTnCRLF Setup Parameter Commands SC1 0 2.3 100 WP 6 5 5CRLF Upcrlf System Operation Commands Celsius mode Will hold the current setpoint for 1 hour and 20 minutes U1c 65.0 u1f IEEE-488 Gpib Error and Status Reporting OverviewTemperature in 20 minutes C4 Manual Rev Error/Status String Bit Definitions C4 Manual Rev Setup Mode PID controller, Integral term Adjustment not Displaying the Field Values Two Probe Mode Setup field Changing the Value of a Setup FieldAuto-start Mode Setup field Temperature Control Terms PID Setup fields 0, 10, 11 Blower Shut-off Mode Setup fieldEntering probe correction setup data C4 Manual Rev C4 Manual Rev Programming Examples & Notes Appendix00.2 00.000.3 00.4Using shortcuts to shorten program entry time DISP/CNTLSTART/STOP 9900CLEAR/ENTRY 6 Enter 04.2 04.004.3 04.407.2 07.007.3 07.4C4 Manual Rev Sigma Systems C4 Programming Worksheet Sample Command Structure for IEEE-488 Gpib Operation Disp A$ Installation and Use of TTL Outputs and Input 101 Field Calibration of Model C4 Controller102 103 TroubleshootingNoise Immunity 105 Firmware Upload Problems 107 Temperature Control PID Tuning & Problems108 109 110 111 Technical Support, Repairs & Returns U1f 102.7113 Index114 115 GpibIEEE488 Gpib 117 118 119 SRQ120