Measurement-computing Micro488/p User Manual

Micro488/p User’s Manualthe smart approach to instrumentation ™IOtech, Inc.25971 Cannon RoadCleveland, OH 44146-1833Phone: (440) 439

1-4 09-26-02Micro488/p, IntroductionNotes:

Getting Started 09-26-022-1Getting Started2.1 InspectionThe Micro488/p was carefully inspected, both mechanically and electrically, prior toshipmen

2-209-26-02Getting Started2.3 Serial Signal DescriptionsThe Micro488/p serial connector is configured as DCE type equipment forRS-232 communication

Getting Started 09-26-022-3Micro/488p Serial ConnectionPin Signal Name I/O Function2RxDReceive DataInputAccepts serial data sent by the RS-232 ho

2-409-26-02Getting Started2.4 Serial Cable WiringIf a cable was not purchased with the interface, the following diagrams will be helpfulin making

Getting Started 09-26-022-52.6 Is Anyone Out There?In order to properly operate the Micro488/p, the DTR and DSR lines on the COM portmust be init

2-609-26-02Getting StartedNow that the Micro488/p is powered on, send it five carriage returns for the buad ratedetection circuitry to set the intern

Getting Started 09-26-022-7Now the Micro488/p is ready for operation. Simply set up an infinite loop to checkfor user keypresses and to look for se

2-809-26-02Getting StartedDO WHILE t + .5 > TIMERLOOPa$ = INPUT$(LOC(1), #1)PRINT "Ready!"DO IF LOC(1) THEN PRINT INPUT$(LOC(1), 1);

Command Descriptions09-27-02 3-1Command Descriptions3.1 IntroductionThis section contains detailed descriptions of each of the low a

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3-2 09-27-02Command DescriptionsSystem Commands:<CTRL> A (ESCAPE)<CTRL> Q (XON)<CTRL> S (XOFF)EC;n (ECHO)H;n (HARDWARE HAN

Command Descriptions09-27-02 3-33.2.1.1 Bus AddressingThe following conventions apply to bus addressing:addrAn IEEE bus address in t

3-4 09-27-02Command Descriptions3.2.2 ResponseThis portion of the command description describes the response that the user'sprogram should re

Command Descriptions09-27-02 3-5If a command is preceded by an asterisk, it is unasserted. For example, *RENstates that the remote ena

3-6 09-27-02Command Descriptions/AThe /A command is a low level IEEE command which asserts the attention line. Aftercompletion of this command, t

Command Descriptions09-27-02 3-7/MLThe /ML command is a low level IEEE command which places the Micro488/p in the listenstate. After

3-8 09-27-02Command Descriptions/TThe /T command is a low level IEEE command which issues the talk command to thespecified IEEE device.SYNTAX /T;a

Command Descriptions09-27-02 3-9/UTThe /UT command is a low level IEEE command which sends the UNT command to theIEEE bus. This comma

3-10 09-27-02Command DescriptionsC DEVICE CLEARThe DEVICE CLEAR command causes the Device Clear (DCL) bus command to be issuedby the Micro488/p.

Command Descriptions09-27-02 3-11EN ENTERThe ENTER command reads data from the IEEE bus. If a device address is specified, thatdevice

iiiWarranty InformationYour IOtech warranty is as stated on the product warranty card. You may contact IOtech byphone, fax machine, or e-mail in reg

3-12 09-27-02Command Descriptions<CTRL>A ESCAPEThe system command ESCAPE unlocks the Micro488/p from an inappropriate command,such as a comm

Command Descriptions09-27-02 3-13TB IEEE BUS TERMINATORThe IEEE BUS TERMINATOR command is used to select the IEEE bus terminator forre

3-14 09-27-02Command DescriptionsIINITThe system command INIT provides a warm start of the interface. Issuing the INITcommand clears the serial in

Command Descriptions09-27-02 3-15LL LOCAL LOCKOUTThe LOCAL LOCKOUT command causes the Micro488/p to issue a Local Lockout IEEEbus comm

3-16 09-27-02Command DescriptionsRE REMOTEThe REMOTE command asserts the Remote Enable (REN) bus management line. If theoptional bus address is s

Command Descriptions09-27-02 3-17SP SERIAL POLLThe SERIAL POLL command performs a Serial Poll of the bus device specified andresponds

3-18 09-27-02Command DescriptionsSQ SRQ CHECKThe system command SRQ CHECK inquires whether or not the SRQ line on the IEEE busis currently being

Command Descriptions09-27-02 3-19X XOFF/XONThe system command XOFF/XON enables or disables XON/XOFF handshaking.SYNTAX X;nn = 0, disab

3-20 09-27-02Command Descriptions<CTRL>Q XONThe system command XON restarts serial transmission from the Micro488/p followingreception of th

Appendix A, Micro488/p Command Summary09-26-02 A-1Appendix A Micro488/p Command SummaryComman

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A-2 09-26-02Appendix A, Micro488/p Command SummaryCommand Code Description PageLOCAL L[;addr] Without optional address, instructs the Micro488/p to

Appendix B Character Codes and IEEE Multiline MessagesAppendix B, Character Codes and IEEE Multiline Messages 09-27-02B-

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Appendix C, Sample Initialization Program09-27-02 C-1Appendix C Sample Initialization P

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Micro488/p, Contents09-26-02 vContents1 Introduction1.1 Description …… 1-11.2 Available Accessories …… 1-11.3 Specifications …… 1-21

vi 09-26-02Micro488/p

Micro488/p, Introduction09-26-02 1-1Introduction1.1 DescriptionThe Micro488/p Bus Controller converts a host RS-232 computer into an IEEE

1-2 09-26-02Micro488/p, Introduction1.3 SpecificationsIEEE 488-1978Implementation: C1, C2, C3, C4 and C28 controller subsets.Terminators: Selectable

Micro488/p, Introduction09-26-02 1-31.4 AbbreviationsThe following IEEE 488 abbreviations are used throughout thismanual:addr n IEEE bus