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HP 53A, E1351A Executing Commands, Direct Control Register, ABORt, C1 - C0, INITiate, ARM:COUNt, (B-D, A-D), Switch Disable, DISPlay:MONitor, Valid Channel (VLD*)

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Direct Control Register

The Direct Control Register allows you to set the controls for individual channels. Note that the DIR bit in the Status/Control Register must be set true for this register to be enabled.

base + 0E16	15	14	13	12	11	10	9	8	7	6	5	4	3	2	1	0

Write				Undefined					X	X	X	VLD*	A_D*	B_D*	C1	C0

Read								Undefined

C1 - C0 These configuration bits determine the measurement mode as listed below:

C1	C0
0	0	Volts
0	1	2-wire ohms
1	1	4-wire ohms
1	0	Thermistor

B and A Tree Isolation

Switch Disable

(B-D*, A-D*)

Valid Channel (VLD*)

Note that to obtain the Thermistor reference temperature for Thermocouple measurements, you must set the configuration bits for Thermistor. After you have obtained the reference temperature, set the bits for Volts.

A zero in either one disables the respective tree isolation switch. Generally, both disabled together equal the [ROUTe:]SCAN:PORT NONE command.

A zero indicates that the specified channel is valid. If DIR is valid and INT EN is true, a WRITE to this register will generate an interrupt.

Executing Commands

This command lists the SCPI commands and shows how to execute them with register-based programming. For further information on register-based programming see the HP E1326B Multimeter User’s Manual.

ABORt ABORt does not have an equivalent in register-based programming. This command is executed from the front panel or over HP-IB.

ARM:COUNt The ARM:COUNt command does not have an equivalent in register-based programming. To scan for a specified number of cycles, use the interrupt generated at the end of the scan list to advance through a program loop for the set number of cycles. For each pass through the loop, reset the pointer to the beginning of the scan list. The IRQ EN in the Status/Control Register must be enabled.

DISPlay:MONitor The DISPlay:MONitor[:STATe] command does not have an equivalent in register-based programming. For high-speed operation it should be set to DISPlay:MONitor OFF.

INITiate INITiate:CONTinuous is equivalent to the CNT EN bit in the Scan Control Register.

90 HP E1351A/53A Register-Based Programming

Appendix B

Contents

Contents Page Page Page Page Page July 20 Page Reader Comment Sheet BUSINESS REPLY MAIL HEWLETT-PACKARDCOMPANY Page Getting Started with the HP E1351A/53A Using This Chapter FET Multiplexer Module Description Multimeter Connection Points Analog Bus Connector Page Switchbox and Scanning Voltmeter Configurations Digital Bus and Triggering Programming Language Initial Operation Configuring the HP E1351A/53A FET Multiplexer Modules Warnings and Cautions Multiplexer Card Numbers Setting the Address Switch Selecting the Interrupt Line Number Setting the Card ID Switch Connecting User Inputs Adding Signal Conditioning Components/Current Shunts Connecting Field Wiring Wiring a Terminal Module Connecting Multimeters and Signal Generators Analog Bus and Digital Bus Cables Page Using the HP E1351A/53A FET Multiplexer Modules Selecting Channels Page Multiplexer Commands Connecting Switchbox Channels to Direct Terminals Comments Connecting Switchbox Channels to Tree Terminals for Making Measurements Page Scanning a Range of Switchbox Channels Page Example: Making 2-WireOhms Measurements by Scanning Example: Making 4-WireOhms Measurements by Scanning Downloading a Scan List Scanning a Switchbox without a Downloaded Scan List Scanning a Switchbox with a Downloaded Scan List Scanning Voltmeter Configuration with HP E1326B Measuring Temperature Using Thermocouples (HP E1353A Module only) Comments Understanding the HP E1351A/53A FET Multiplexer Modules Commands for Scanning Switchbox Channels Using Scanning Trigger Sources Page Page Example: Scanning with External Instruments Using "Trig Out" and "Event In" Ports Using Stand-Alone Multimeter and Digital Bus Triggering Using Scanning Voltmeter Configuration and Digital Bus Triggering Using the Scan Complete Bit HP E1351A/53A 16-ChannelFET Multiplexer Command Reference Command Types Common Command Format SCPI Command Format Command Separator Abbreviated Commands Implied Commands Note SCPI Command Reference ABORt ARM DISPlay :MONitor:CARD :MONitor[:STATe] Monitoring Switchbox Channels: Selecting the Module to be Monitored: Monitor Mode on an HP 1301 Mainframe Display: Example Enabling the Monitor Mode INITiate Example Enabling Continuous Scans :CONTinuous Example Query Continuous Scanning State Starting the Scanning Cycle: ∙Stopping Scanning Cycles: See the ABORt command OUTPut [ROUTe:] Example Closing Multiplexer Channels CLOSe ∙ Query is Software Readback: The [ROUTe:]CLOSe? command Example Query Multiplexer Channel Closure OPEN Opening Multiplexer Channels OPEN ∙ Query is Software Readback: The [ROUTe:]OPEN? command Query Multiplexer Channel Open State SCAN ∙Scanning Operation: With a valid channel list Stopping Scan: Example Scanning Using External Instruments SCAN:MODE Order of Command Execution: Mode Description: Selecting the 4-Wire SCAN:MODE Example Query Scan Mode SCAN:PORT port Example Selecting the ABUS Port SCAN:PORT Example Query Scan Port SETTling[:TIME] Digital Bus Handshaking: Example Setting 16 μsec SETTling TIME SETTling[:TIME] Example Set and Query the SETTling TIME STATus :OPERation:ENABle SYSTem :CDEScription :CTYPe :ERRor TRIGger :SOURce ∙ Enabling the Trigger Source: The TRIGger:SOURce command Using the Using Digital Bus Trigger: Using External Trigger Inputs: Example Scanning Using External Triggers Scanning Using Bus Triggers :SOURce Example Query Trigger Source IEEE 488.2 Common Commands Command Quick Reference Page HP E1351A/53A FET Multiplexer Specifications Page HP E1351A/53A Register-Based Programming About This Appendix Register Addressing Page The Base Address A16 Address Space Outside the Command Module or Mainframe Register Descriptions Page Register Bit Descriptions Manufacturer ID Register Status/Control Register Scan Control Register Scan Channel Delay Register Scan Channel Configuration Register Configuration Bit (C1 - C0) Executing Commands OUTPut [ROUTe:] SYSTem TRIGger Register-BasedProgramming for Maximum Speed VLD A_D B_D decimal code: Page Multimeter Command and Parameter Opcodes Page Register-Based Programming Error Codes HP E1351A/53A FET Multiplexer Error Messages Page Index