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User’s Guide
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V R 2 0 0 / R S - 4 2 2 A
C o m m u n i c a t i o n s
I n s t ruction Manual
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® OMEGAne t On-Line Service Internet e-mail h t t p : / / w w w .omega.com i n f o @ o m e g a . c o m Servicing North America: USA: One Omega Drive, Box 4047 ISO 9001 Certified Stamford, CT 06907-0047 Tel: (203) 359-1660 FAX: (203) 359-7700 e-mail: info@omega.com Canada: 976 Bergar Laval (Quebec) H7L 5A1 Tel: (514) 856-6928 FAX: (514) 856-6886 e-mail: info@omega.ca For immediate technical or application assistance: SM USA and Canada: Sales Service: 1-800-826-6342 / 1-800-TC-OMEGA SM Customer Se
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PREFACE This instruction manual describes the optional RS-422-A communication function for the VR200 view recorder. For details concerning the operations of the recorder, refer to the instruction manual for the VR200. Trademarks • “IBM” is a trademark of International Business Machines Corporation. • “MS-DOS” and “Windows” are trademarks of Microsoft Corporation. 1
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CONTENTS PREFACE Chapter 1 INSTALLING THE RS-422-A INTERFACE 1.1 Interface Specifications ................................................................................................................ 1-1 1.2 Interface Terminal ........................................................................................................................ 1-2 1.2.1 Terminal Assignment ...................................................................................................... 1-2 1.2.2 Cable
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Chapter 1 Chapter 2 Chapter 3 Chapter 4 Chapter 5 Chapter 6 Chapter 7 APPENDIX INDEX CONTENTS 2.4 Escape Sequence......................................................................................................................... 2-13 2.4.1 Execution of Trigger ..................................................................................................... 2-13 2.4.2 Status Output ..........................................................................................................
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1 INSTALLING THE RS-422-A INTERFACE 1.1 Interface Specifications Chapter 1 INSTALLING THE RS-422-A INTERFACE The option /C3 provides the VR200 view recorder with the EIA (Electronic Industries Association) RS-422-A communication interface to allow a host computer to do the following: • read measured values, • read parameters, and • set parameters. However, this interface does not allow the host computer to operate the power switch of the VR100VR200 nor control the parameters which can only be s
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1.2 Interface Terminal 1.2.1 Terminal Assignment SD A SD B SG G (signal ground) MEMORY RD A RD B FG G (frame ground) Connect RD to TD of the host computer. Connect SD to RD of the host computer. Option terminal Indication of RS-422-A terminals Figure 1.1 Terminal Assignment 1.2.2 Cable Termination Shield potential RS-422-A terminals Terminal screws: ISO M4, 6 mm long Use crimp-on lugs (for 4 mm screws) with insulation sleeves for the leadwire ends. Figure 1.2 Cable Termination To prevent an
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1 INSTALLING THE RS-422-A INTERFACE 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. P
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If A < B, then signal = 1 If A > B, then signal = 0 1.4.1 Start-stop (Asynchronous) Communication The built-in RS-422-A interface communicates based on the start-stop (asynchronous) system. The start-stop system first adds the start bit to the head and then in turn adds the data bits (7 or 8 bits), parity bit, and stop bit(s) to every transmission of each character (see Figure 1.4). Define the address of the RS-422-A interface built in the VR200 recorder, baud rate, data length, parity bit, a
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3 1 INSTALLING THE RS-422-A INTERFACE t x e T 2 t x e T 1 t x e T 1.4 Data Configuration Note The VR200 identifies an LF as the end of a text when receiving data (and sends a CR and LF as the terminator when sending data). As shown in the example in Figure 1.6, when a CR and LF are used as the terminator, the CR is ignored. Take care when communicating with a PC, since some PCs may not send the LF character depending on the mode when the PRINT command, etc. is invoked. 1.4.3 Input Buffer The
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1.5 Setting up the RS-422-A Communication Interface SETUP PROCEDURE: 1 Unpack the VR200 recorder. 2 While pressing the [ ] key, turn on the power to enter the SETUP mode. 3 Use the [ ]/[ ] keys to select the display ‘SETUP=OPT,’ then press the [ ] key. 4 Use the [ ]/[ ] keys to select the display ‘OPT=COMM,’ then press the [ ] key. 5 Use the [ ]/[ ] keys to select the address of the RS-422-A interface of the recorder from 01 to 16, then press the [ ] key. The default is ‘01.’ Note that
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2 RECEIVING FUNCTIONS 2.1 General Rules for Commands Chapter 2 RECEIVING FUNCTIONS This chapter describes the program set commands and program control commands. Remember first to open a device by invoking the ESC O command before the set or control commands can be sent. 2.1 General Rules for Commands A command is represented by ASCII codes and consists of an identifier, parameters, delimiters and a terminator. Example: SR01, VOLT, 20 mV, 0, 10000 terminator Parameters Identifier Identifier • D
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2.2 Program Set Commands 2.2.1 List of Program Set Commands Command Type Command Function SR Sets the input range and display scale. SA Sets the alarms. SN Sets the engineering unit. SW Sets the waveform span rate. SD Sets the date and time. SY Copies the channel settings. SZ Sets the discrete (zone) display. Set SP Sets the partial expanded display. SK Sets whether to display the scale values. ST Sets the tag number. SL Sets the trip level. SF Sets the floppy disk format. SG Sets the data fil
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2 RECEIVING FUNCTIONS 2.2 Program Set Commands Input range table Input type Range Input Measurement range Unit 20 mV 20 mV -20.00 to 20.00 mV mV 60 mV 60 mV -60.00 to 60.00 mV mV 200 mV 200 mV -200.0 to 200.0 mV mV DC Voltage 2 V 2 V -2.000 to 2.000 V V 6 V 6 V -6.000 to 6.000 V V 20 V 20 V -20.00 to 20.00 V V Measurement range Measurement range Input type Range ˚C ˚F R 0.0 to 1760.0 ˚C 32 to 3200°F S 0.0 to 1760.0˚C 32 to 3200°F B 0.0 to 1820.0˚C 32 to 3308°F K -200.0 to 1370.0˚C –328.0 to 249
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Example: SR01, SCL, VOLT, 20mV, 0, 1000, –1000, 1000, 1 This example performs 0 to 10 mV input in channel 01 and is scaled from – 100.0 to 100.0. Note An error will occur if one or two of p5, p6, and p7 are omitted. However, it is possible to omit all three values if you do not want to change them. SQRT (Square Root) Format: SRp1, mode, p2, p3, p4, p5, p6, p7 p1: Channel number (CC) mode: SQRT p2: Range designation Selectable from 20mV, 60mV, 200mV, 2V, 6V, and 20V. p3: Low limit value of the d
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2 RECEIVING FUNCTIONS 2.2 Program Set Commands 2.2.4 Setting the Unit (See Section 4.3 of the instruction manual for the VR200.) Format: SNp1, p2 p1: Channel number (CC) p2: Engineering unit (up to six characters) Example: SN02, kg This example assigns the unit “kg” to channel 2. Note that a unit can only be assigned to channels of the SCL or SQRT input. 2.2.5 Setting the Waveform Span Rate (TIME/DIV) (See Section 4.4 of the instruction manual for the VR200.) Format: SWp1 p1: Select the wav
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2.2.8 Setting the Discrete (ZONE) Display (See Section 4.7.1 of the instruction manual for the VR200.) Format: SZp1, p2, p3 p1: Channel number (CC) p2: Lower display boundary value (0 to 95) p3: Upper display boundary value (5 to 100) Example: SZ02, 30,50 This example results in the display for 0 to 100% of channel 2 in the band from 30 to 50% of the scale. Note • The display bandwidth cannot be set to 5% or less. • The lower display boundary must be less than the upper boundary. 2.2.9 Setting
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2 RECEIVING FUNCTIONS 2.2 Program Set Commands 2.2.12 Setting the Trip Level (See Section 4.7.5 of the instruction manual for the VR200.) Format: SLp1, p2, p3 p1: Trip level number VR100 and VR200 with style number 1 or lower 1 for level 1 (red line) 2 for level 2 (yellow line) VR200 with style number 2 higher 1 to 6 p2: Whether to display. Enter “ON” or “OFF.” p3: Level. 0 to 100 (%). p4: Color (RED, GRN, BLU, BRN, PRP, L.BLU, ORG, GRY, W.RED, only for VR200 with style number 2 or higher) E
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2.2.15 Setting the LCD Brightness and LCD Saver (LCD) (See Section 4.8 of the instruction manual for the VR200.) Format: SCp1, p2, p3 p1: LCD brightness level. 0 to 15 p2: Sets the LCD saver function “ON” or “OFF.” p3: Timer setting to activate the LCD saver. Select from 1, 2, 5, 10, 30, and 60 (minutes). Example: SC8, ON, 10 This example sets the brightness level to 8 and the LCD saver to be activated in 10 minutes after the last key operation. 2.2.16 Setting the Summer/ Winter Time (DST) (S
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2 RECEIVING FUNCTIONS 2.2 Program Set Commands If your model has -3M option, add the parameter p3. p3: Select the methods when saving measurement data to the floppy disk: ALL (default) save all measurement data from the VR200 internal memory. UNSAVED: Save only the meansurement data newly loaded to the VR200 internal memory, after the last time you saved to the floppy disk. 2.20 Waveform Display and Scale Display Setting (DISP_WAVE, for the VR 200 with style number 2 or higher) (see section 4.7
