Manuals / Brands / Computer Equipment / Printer / HP / Computer Equipment / Printer

HP FET MULTIPLEXER E1351A/53A Scan Control Register, Scan Channel Delay Register, D3 - D0, Reset Pointer (RST PTR), Clear Scan List (CLR SCN), Immediate Enable (IMM EN)

1 107

Download 107 pages, 1.54 Mb

Scan Control Register

The Scan Control Register allows you to clear the scan list, set the trigger mode and reset the pointer to the beginning of the scan list. This register is a READ-back register, allowing you to verify the state of the WRITE register.

base + 0616	15	14	13	12	11	10	9	8	7	6	5	4	3	2	1	0

Write				Undefined					X	X	X	RST	CNT	IMM	DBS	CLR
												PTR	EN	EN	EN	SCN

Read				Undefined					1	1	1	1	CNT	IMM	DBS	CLR
													EN	EN	EN	SCN

Clear Scan List (CLR SCN)

Digital Bus Enable (DBS EN)

Immediate Enable (IMM EN)

Writing a one (1) in this bit clears the scan list. The bit must be set back to zero (0) after flushing. CLR SCN (Read) returns the state of the bit.

Writing a one (1) enables the digital bus trigger mode. A zero (0) disables it. DBS EN (Read) returns the state of the bit.

Writing a one (1) in this bit sets trigger to immediate, which means that as soon as the first channel is closed by the TRG INT, the entire scan list is run without any further triggering. Channel advance speed is determined by the delay time specified. This has extremely limited applications.

Continuous Enable (CNT EN)

Reset Pointer (RST PTR)

Writing a one (1) in this bit enables the card to continually cycle through the scan list. When this bit is enabled, the last channel in a scan list resets the pointer back to the beginning of the scan list.

Writing a one (1) resets the pointer back to the beginning of the scan list. CNT EN true automatically resets pointer at end of scan list. If CNT EN is set true, an interrupt also resets the pointer. If CNT EN is set false, the last channel in the scan list generates an interrupt if the channel is valid (VLD* set true).

Scan Channel Delay Register

The Scan Channel Delay Register sets the SETTling:TIME, the time between receipt of a channel closing trigger and the Channel Closed pulse. The delay is 2n μS and n has a range of 0 to 15. D3 to D0 set n, and D0 is the least significant bit. This register is a read-back register, allowing you to verify the state of the WRITE register.

base + 0816	15	14	13	12	11	10	9	8	7	6	5	4	3	2	1	0

Write				Undefined					X	X	X	X	D3	D2	D1	D0

Read				Undefined					1	1	1	1	D3	D2	D1	D0

D3 - D0 D0 is the least significant bit, D3 is the most significant. These bits designate a number between 0 and 15 for n.

88 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