Valco Instruments Co. Inc. Serial Valve Interface Instruction Manual svi.P65 Rev. 7/08 Printed in USA North America, South America, and Australia/Oceania contact: ® Valco Instruments Co. Inc. tel: 800 367-8424 fax: 713 688-8106 valco@vici.com Europe, Asia, and Africa contact: ® VICI AG International tel: + 41 41 925-6200 fax: + 41 41 925-6201 info@vici.
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Table of Contents General Description .............................................................................................. 1 Installation ............................................................................................................ 2 SVI Setup ...................................................................................................... 2 Interfacing the SVI to a PC ............................................................................ 3 Electric Actuator Connections .
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1 General Description The Valco Serial Valve Interface (SVI) is a device that converts commands from a computer, via a serial port, into positional control for our two position and multiposition valve actuators. Each SVI can control up to four air or electrically actuated two position valves and two electrically actuated multiposition valves. The SVI has two serial port connections (one male, one female) which allow daisy-chaining of up to eight SVI’s on a single serial communication port.
2 Installation The Serial Valve Interface can be easily installed by the user with the following items as supplied with the SVI: • One wall-mount power supply • One RS-232 cable, to interface the SVI to any PC/AT compatible serial communications port with a DB-9 connector Serial Valve Interface Power supply • One two-position interface cable for connecting up to four two-position electric actuators or Digital Valve Interfaces for use with air actuators • Two 20-pin IDC connectors, to adapt the external i
Installation 3 CAUTION: For proper startup, make sure that all the jumper settings in the SVI are correct, and that all external devices have been disconnected or are turned off before applying power to the SVI. Figure 1: SVIs daisy-chained to a single host computer Interfacing the SVI to a PC The SVI has two communication port connectors labeled “COM 1” and “COM 2”. The RS-232 cable provided connects the COM 1 connector on the SVI to the serial port connector on the PC.
Installation 4 Electric Actuator Connections Standard Two Position Electric Actuators To connect the SVI to a two position standard electric actuator, use the two position interface cable. Plug one end of this cable into the connector on the top of the SVI which is labeled V1 V2 V3 V4. The other end of the cable has four Molex connectors which are addressed by the SVI as V1 through V4.
Installation 5 Two Position Air Actuator Connections The SVI can be used to control up to four Valco two position air-actuated valves by connecting the SVI to the Valco Digital Valve Interface (DVI). The two position electric actuator cable can be adapted to control a DVI using this procedure: 1. Use a wire cutter to remove the plastic Molex connector from the SVI connecting cable. 2.
Installation 6 CAUTION: When the SVI Valve 1 output is jumpered for 12 VDC output, remove the plastic Molex connector from the SVI cable to insure that damage will not result from an accidental connection to a Valco two position electric actuator or DVI. Before using the valve outputs to drive any load in excess of 12 VDC, the jumper on connector CO13 must be changed to the OFF position.
7 Communicating with the SVI using Vcom Vcom is a simple serial port utility that can be used to send a sequence of text strings at timed intervals. The times and associated text strings are stored in method (.mth) files. It is also possible to send individual strings, entered using the keyboard, and view any reply. 1. Selecting a serial port Open a serial port by selecting Utility > Com.Port from the menu. The next time the program is run, the selected serial port will be opened automatically. 2.
Communicating with the SVI using Vcom 8 Transmitted Command Types The following is a list of the command letters for the types of commands available for controlling the SVI. Each letter represents a specific function the SVI will perform. The commands are sub-divided into two groups: commands directed to specific valves, and commands directed to the SVI. Commands for Specific Valves V Indicates a Valve positional command. It is used to direct the SVI to move a valve to an indicated position.
Communicating with the SVI using Vcom 9 For multiposition valves (5 and 6), positioning is defined using the numbers 1 through 16, limited by the number of positions of the valve. (If an invalid valve position request is sent, a response of BCMD appears, indicating a command which cannot be executed.) Examples Command: V1A Instructs the SVI to move valve 1 to Position A. The first variable is the command letter, which indicates that this is a Valve positioning command.
Communicating with the SVI Using Vcom 10 Fixed Syntax Commands These commands are used only with the fixed syntax as they are listed below. There are no valve or position variables. Command: R Initiates a RESET procedure. Once initiated, the device requires up to four seconds before it responds with a reset acknowledgment. Command: EON Initiates ECHO ON. After the receipt of this command, the SVI will echo a serial port response to all valve positioning commands. Command: EOF Initiates ECHO OFF.
Communicating with the SVI using Vcom 11 Responses Received from the SVI The SVI transmits responses to host commands or to perceived changes in valve status. It also echoes commands which are not directed towards itself. While the syntax of the response is identical to that of the transmitted command, the content may differ. This permits differentiation of critical responses from echoed commands. The SVI responses are listed below: RST This response always follows an SVI reset.
12 Technical Drawings Cable assembly for two position actuators ........................ Drawing 22041 Page 13 Jumper settings ................................................................ Drawing 22110 Page 14 Adaptor cable, SVI to two pos. microelectric actuator ....... Drawing 23196 Page 15 Adaptor cable, SVI to multipos. microelectric actuator ......
(CONTACT CLOSURE) (CONTACT CLOSURE) (COMMON) (LOAD) (INJECT) (CONTACT CLOSURE) (CONTACT CLOSURE) (COMMON) (LOAD) (INJECT) 1 GRY 2 VIO 3 BLU 4 WHT 5 BLK 6 N/C 1 ORN 2 RED 3 BRN 4 YEL 5 GRN 6 N/C 4 5 6 3 6 1 5 3 2 4 6 1 5 3 2 4 1 6 3 2 5 MALE MOLEX PINS #02-06-2132 (20 EACH) I-T02062132 6 PIN MOLEX CONNECTOR #03-06-2061 (4 EACH) I-T03062061 (CONTACT CLOSURE) (CONTACT CLOSURE) (COMMON) (LOAD) (INJECT) 1 ORN 2 RED 3 BRN 4 YEL 5 GRN 6 N/C 4 NOTCH 1 1 1 1 2 2 2 2 3 3 3 3 4 4 4 4 RE
J2 & J3 OPTION 2 OPTION 1 OPTION SELECT FOR CO11 CO14 OPEN COLLECTOR 12V OUTPUT VALVE 1 MODE SELECT CO12 ON J4 Z1 SO3 C5 CO12 Q3 R1 R2 R3 C10 LED1 Z8 SKT8 + + SO1 C15 C12 C14 SKT1 Z1 C13 Z5 Z6 RN3 Z7 RN2 CO6 CO5 X1 SKT4 Z4 FACTORY SETTING NOT USED NOT JUMPERED JUMPERED SKT7 SKT6 SKT5 SCH-22038 AS-22037 SKT3 AW-247 REV.
Technical Drawings 15 LTR A DESCRIPTION DATE NEW DWG ECN# 2801 10/06/95 INITIATED J.
5 6 BROWN PIN#: 1 2 7 4'.0" 1 BROWN PIN#: 1 8 3 4 ITEM 1 2 3 4 5 6 7 8 T6092030 PIN N/C N/C N/C N/C N/C N/C N/C 5 N/C 9 N/C 13 N/C ORANGE WHITE GREEN COLOR DATE 01/12/96 APPROVED RED BLUE BROWN ORANGE YELLOW BROWN YELLOW BLACK COLOR RED JDURR QTY 2 2 1 1 1 1 .5 .25 T6092030 PIN 12 N/C 11 14 10 N/C 4 N/C 3 N/C 2 6 1 VALCO# I-W-R/20 I-W-R/26 I-T6092030 I-T6092031 I-T6092630 I-T6092631 I-STUBE.062 I-STUBE.
17 Warranty This Limited Warranty gives the Buyer specific legal rights, and a Buyer may also have other rights that vary from state to state. For a period of 365 calendar days from the date of shipment, Valco Instruments Company, Inc. (hereinafter Seller) warrants the goods to be free from defect in material and workmanship to the original purchaser.
