Omega Speaker Systems VR200 instruction manual Communication Wiring, Data Configuration

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1.3 Communication Wiring

1.3 Communication Wiring

If the host PC is equipped with an RS-422-A interface, the VR200 can be connected directly. If the host PC is equipped with only an RS-232-C interface, the VR200 can be connected using a converter (SHARP model Z-101HE or equivalent).

Shown below are two wiring examples, which are the same except for the case shielding. If there will be a connection between different panels, wiring method b should be used.

Personal

computerConverter Z-101HE

(SHARP)

R*

a

R*

	Personal	Converter
	computer	Converter
	computer	Z-101HE
		Z-101HE
		(SHARP)
		R*
	b

R*

* R in the figure denotes the terminal resistance.

R:100W, 1/2 W or greater (adjust according to the impedance. The converter shown above is the inverter type. The + and - polarity depends on the type of converter.)

Figure 1.3 Communication Wiring

In case a, use two pairs of 24 AWG (minimum) twisted shielded cables or the equivalent. In case b, use three pairs of 24 AWG (minimum) twisted shielded cables or the equivalent. The extra pair is used for SG in case b. (Characteristic impedance: 100

Ω, capacitance: 50 pF/m)

Keep the terminated unshielded section to a minimum and clear of the VR200 recorder ground line.

To prevent an electric shock, ensure that the main power supply is turned off.

1.4 Data Configuration

The signal is determined by the potentials of RS-422-A terminals A and B, as follows:

1 INSTALLING THE RS-422-A INTERFACE

1 - 3

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Contents User’sGuide Servicing North America Preface TrademarksContents Program Examples Time Chart Initial Status Errors During RS-422-A OutputTransmitting Functions Installing the RS-422-A Interface Interface SpecificationsInterface Terminal Terminal Assignment Cable TerminationCommunication Wiring Data ConfigurationStart-stop Asynchronous Communication TextInput Buffer Buffer OverflowSetting up the RS-422-A Communication Interface Setup ProcedureTerminator IdentifierParameters List of Program Set Commands Setting the Range and ScaleFormat SRp1,mode Example SR01,SKIPFormat SRp1, mode, p2, p3, p4, p5, p6, p7, p8 Format SRp1, mode, p2Example SR01, DI, Setting Alarms Setting the Unit Setting the Waveform Span Rate TIME/DIVSetting the Clock Copying the Channel SettingsSetting the Tag Setting the Discrete Zone DisplaySetting the Partial Expanded Display Setting the Trip Level Setting the Data File Name FileSetting the LCD Brightness and LCD Saver LCD Setting the Summer/ Winter Time DSTFormat MDp1, p2, p3 Example MD02, ON, onList of Program Control Commands Alarm AcknowledgeStandard Screen Call Initializing the Data MemoryLoading the SET Configuration File Saving the SET Configuration FileSelecting the Output Data Selecting the Output Format for Measured DataMessage Writingfor the VR 200 with style number 2 or higher Requests for the data to be prepared in the buffer Execution of TriggerStatus Output Open Command Close CommandESC O Crlf ESC C CrlfIntroduction to Output Data Formats Sequence see also Sections 2.3.7Output Format of Measured Values in Ascii Mode Output Data FormatsOutput Format of Measured Values in Binary Mode Output Format of Parameter Settings Output Format of Unit and Decimal Point Information Time Chart Initial Status Preventing Errors OutputHow to Request Error Message Output ESC S CR LFTiming of Resetting the Error Status Program Examples EnvironmentOpen TEST.DAT for Input AS #2 Others LF is sent automatically 210 ‘ 220 ‘ Open COM11200,N,8,1,LF AS #1 Print a Appendix Appendix 1 Ascii Code TableAppendix 2 File Naming Rules File Name LengthLowercase/Uppercase Letters System-reserved File NamesIndex Index for Command Reference Warrant Y/ Disclaimer Temperature