User manual for newer units (controller series E2CA)
Contents
1. ASSEMBLY bottom view i he NTROLLER Wee Mena P N EQMA Highest speed M 4 4 P N 1 22689 PIN EHMA High speed and Low torque EDMA Medium speed torque j ETMA High torque f EBMA Highest torque 00000 MOUNTING PIN 1 BRACKET C C a E l POSITION VIGI Valco Instruments Co Inc TWO POSITION ACTUATORCONTROL pinaes CLAMP POSITION l J SCREW ejO PF P N E2CA K J flo POSITION INDICATOR ooo 0000000000 sez LIGHTS PIN 1 PIN 1 E A MANUAL CONTROLLER CABLE 24 P N 22537 01 voy D x OPTIONAL _ SERIAL PORT RS 232 CABLE TO COMPUTER pg3 J P N 22697 a CONNECTOR AK 4 FEMALE _ Figure 1 Actuator and controller connections Installation and Use Getting Started Figure 1 shows how to connect the various actuator components There are four connectors on the control module keyed and sized to prevent incorrect connection Cable and Connector Functions Input power 24 28 VDC regulated is supplied through a 2 5mm DC power jack the inner pin is voltage and the outer pin is ground The a2. SERIAL NUMBER TAG CONTROL MODULE bottom view m y A af S A _ 1 e a 8 32 MOUNTING HOLES CONFIGURATION TAG O O The length of the 8 32 screws used for panel mounting is not critical as long as they extend at least 1 4 into NS the actuator casting Figure 2 3 Initialization Initialization is the procedure by which the actuator learns the stroke of the installed valve and its hardware Any time a valve is removed and reinstalled the actuator must be initialized by following these steps Hardware method 1 Cycle the actuator twice with no valve or with either end of the motor driver output cable unplugged 2 Plug the cable back in or put the valve back in the clamp ring Orient the valve as desired and tighten the clamp screw Software method 1 Send IN lt enter gt via serial communication Discussion of serial control begins below Once you have started an initialization sequence by either method the actuator will move at half its normal speed while it seeks the valve stops Once it determines the proper travel the actuator will return to normal speed Cycle the actuator back and forth for four or five cycles or until you hear the change in speed If you don t hear the change make sure that the clamp screw is tight Since the actuator checks the end points on each move it will detect any inconsistencies Positioning inconsistencies or errors are indicated when position out
3. SERIAL INTERFACE CABLE Prod No 22697 3 PIN CONNECTION CABLES Prod No 23062 Figure 3 Multiple actuators controlled by one computer via RS 232 or RS 485 preferred For permanent multidrop applications the RS 485 mode below is the preferred solution However just as RS 232 control requires the host to have an RS 232 serial port the PC host or control sys tem must have an RS 485 port to communicate with the actuator in the RS 485 mode Plug in PCI cards with RS 485 ports or adaptors that change an RS 232 signal to an RS 485 signal are available from several common electronic manufacturers If your computer lacks a serial port adaptors which convert USB ports to RS 232 or to RS 485 are also readily available To set the ID of an actuator connect it to a serial port as shown in Figure 1 on page 2 Caution When installing or replacing actuators on a shared serial port make sure that no two devices have been set to the same ID number 1 Remove all of the actuators from the serial daisy chain except the one for which you are setting the ID 2 Type VR lt enter gt You should get a response giving the firmware version indicating that serial communication with the actuator is established If there is no response type VR lt enter gt to see if the ID is already set If there is still no response check the cabling and connections 3 To setan ID type IDn lt enter gt where n is the new ID from 0 to 9 To change an
4. 1 0 Nm increased torque Model gear ratios vary from 3 14 to 22 56 ED 22 Ib in 2 5 Nm capable of continuous operation of valves with turning torque requirements from 2 7 to 50 Ib in 0 3 to 5 7 Nm as indicated AONAN Nm in Table 1 EB 50lb in 5 7 Nm Valve Switching Times Table 1 Recommended maximum loads The actual time required to switch the valve from 3 Position A to Position B Table 2 depends on two Actuator dlake o eeta Le factors the model number reflecting the actua tor speed and the degree of rotation between positions Serial numbers are on the underside of the control module Figure 2 Actuators of this series are further identified by a plastic control module housing If your actuator control module OET 360 has a metal housing and a serial number starting with EM2C U 650 430 360 30 please refer to Technical Note 413 EB 1500 1050 70 570 Table 2 Valve switching times in milliseconds POWER SUPPLY TO 110 OR 220 VAC P N PS24VDC CE User must supply other LINE CORD IEC 320 line cord configurations P N I W 17600 aed OPTIONAL INPUT POWER CABLE TO BLACK WHITE STRIPE EINE 289 08 EXTERNAL 424 28 VDC CONTROL GND SYSTEM aa u BLACK f f DIGITAL INPUT OUTPUT CABLE P N l 22537 MOTOR DRIVER OUTPUT CABLE G ll P N 1 22645 MANUAL i MOTOR GEARBOX
5. ID type iIDn lt enter gt where is the current ID and nis the new ID To disable the ID feature type iID lt enter gt where is the current ID Setting a New Baud Rate To permanently set a new baud rate for the actuator 1 Establish communications with the actuator at the current baud rate 2 Issue the command SBn to temporarily change the baud rate to the desired rate If the power goes down at this point the baud rate will revert to the last permanent setting 3 Change the host computer to the same baud rate just set in the actuator and verify that you can establish communication 4 Re issue the same SBn command as in Step 2 and the current baud rate will be made permanent Serial Control RS 485 Option When the serial port configuration switch is set to the 485 position the serial port output is changed to the RS 485 mode This also changes the software protocol as described in the section entitled Software on the next page You may wish to modify the configuration tag on the bottom of the control module to reflect this Comm change Setting the Serial Port Configuration Switch OOD wv IO Q 1 Grip the lower section of the control module Oge a enclosure on the two opposing sides that MODEL He hee ecu ae nS have the curved release tabs SWI ae ee 5 cesta eee es te 2 Carefully depress the tabs while lifting the Bii roe da cE Oo a e top section with the other hand We rec ig l sre wait Om ay
6. O an ommend that the enclosure be opened i re sau Da oN in a static free environment following all SERIAL PORT proper ESD protection techniques sama Te a yee owe NOTE Once the control module cover has ZDQ been removed the printed circuit board can i fall out Figure 4 Switch locations 3 Locate the slide switch marked 232 lt gt 485 and set it to 485 The slide switch labelled Ter mination On lt gt Off is usually left in the Off postion unless the wiring from the host control to the device is very long and it is the last device at the end of a signal chain of devices Caution The rotary switch marked SW3 reflects which motor assembly is used and should usually not be changed unless the control module is being dedicated to a different motor gearbox assembly If that is the case refer to the section entitled Setting the Model Switch on page 9 Hardware The Valco implementation of RS 485 is half duplex two wire with ground and uses the same 3 pin output connector as RS 232 Pin 1 is ground and pins 2 and 3 are signals B and A respectively RS 485 Cable The cable should be 24 AWG twisted pair with low shunt capacitance Configuring RS 485 Adapters While each adaptor is different there are three issues to consider The first consideration is two wire versus four wire application Some adaptors may have the capacity for both types of operation and you may hav
7. motor gearbox assembly it shipped with However it is relevant for instrument builders who keep a stock of control modules which will be paired with a variety of motor gearbox assemblies NOTE If the switch is set to an invalid position other than 1 through 5 the position indicator lights will flash continuously and the configuration will not change If the unit is powered up with the model switch set in an invalid position the VR command will elicit the response Not valid Select 1 6 1 Find the tag on the motor gearbox assembly which identifies it as a Model EQ EH EP ED ET or EB 2 Follow the instructions for removing the control module cover in Setting the Serial Port Configura tion Switch on page 6 3 Locate the 10 position rotary switch marked SW3 Figure 4 page 6 and set it according to the legend printed underneath the switch for the motor gearbox assembly to which it will be coupled 4 Snap the cover back on the control module You will probably wish to change the configuration tag on the bottom of the control module to reflect this modification North America South America and Australia Oceania contact Europe Asia and Africa contact TN 421 1 Rev 12 13 Valco Instruments Co Inc VICI AG International P O Box 55603 Parkstrasse 2 Houston TX 77255 CH 6214 Schenkon Sales 800 367 8424 Switzerland Tech 713 688 9345 Phone 41 41 925 6200 Fax 713 688 8106 valco vici com Fax 41 41 925 6201 info
8. status and the number of actuation cycles All values that are set by serial port commands such as DT ID SM etc are retained through power on off cycles Refer to special instructions for permanently setting the baud rate on page 6 NOTE Characters shown in parentheses indicate a user defined number n or letter I If the command is issued without that character the response displays the current setting supplying the number or letter sets the actuator accordingly L Using the Device ID Feature E Actuators are shipped from the factory in the A VIGI VIGI MoAA mode with the ID feature disabled DB 9 2 POSITION ACTUATOR 2 POSITION ACTUATOR When an ID is set the actuator responds only to commands which begin with the correct ID prefix and its transmit output is disabled when not in use This allows up to 10 actuators to be controlled from one computer RS 232 port A single command can be broadcast to all actuators by using an asterisk as the command prefix NOTE Any broadcast command which elicits a response from the serial port such as VR or ID will elicit a combined and unintelligible response CONNECTOR l POSITION A B POSITION A B Dog pod PORTS CAN BE EITHER IN OR OUT Mak dace 1 TO NEXT J H ACTUATOR
9. vici ch Cheminert and VICI are registered trademarks of Valco Instruments Co Inc and VICI AG
10. will elicit a response from all devices on line no matter what their ID is Protocol The serial protocol is an ASCII character string protocol All commands are terminated with the car riage return OD hex or r character which defines the end of commands for both inputs and outputs Line feed characters OA hex sent to the device are ignored When using a terminal program for communications pressing the lt enter gt key will generate the carriage return character Software flow control Xon Xoff and hardware handshaking are not supported VR lt enter gt Displays the part number and date of the firmware Golen delay time then rotates back to the original position i CC lt enter gt TO lt enter gt TT lt enter gt CP lt enter gt DT n lt enter gt ID n lt enter gt ID I lt enter gt SB n lt enter gt Sets or displays the baud rate where n 2400 to 115 220 Default is 9600 Sets or displays the digital input mode where n 1 to 4 Sets or displays the delay time before the position outputs are turnedoff set in milliseconds to the closest 5 ms interval from O to 30 000 ms The outputs are always on SO 0 by default B Displays a list of valid commands SM n lt enter gt SO n lt enter gt CNT n lt lt enter gt The table above includes commands to reposition the valve to configure input and output functions to set baud rates and other communication options and to monitor the power
11. C to these 10 Position B relay contact output Table 4 Digital cable pin descriptions inputs as permanent damage to the device may result Digital Input Modes Four input mode options are provided to expand the control flexibility of the actuator The factory default setting is Mode 1 All four modes are described below The mode can be set via the serial port using the SMn command and is retained even when the power is cycled to the controller See the serial commands section on page 4 5 for details NOTE Changing the input mode does not affect the digital output functinos Mode 1 dual signal control mode In mode 1 default the digital inputs use the two input signals for position control Asserting input pin 5 causes the actuator to go to Position A and asserting input pin 6 sends it to Position B If both signals are asserted at the same time they will be ignored Mode 2 single signal toggle mode Operation in this mode uses a single signal for position control with two options Asserting pin 5 causes the actuator to toggle from the current to the opposite position Asserting pin 6 causes the actuator to toggle to the opposite position delay for a user settable period of time the default is 100 ms then toggle back to the original position The delay time is set using the DTn serial port command See the serial commands section on page 4 5 for details Mode 3 state mode with enable This mode uses the pin 5 input as a
12. Technical Note 421 Two Position Microelectric Valve Actuator Control module serial numbers starting with E2CA Introduction Description The two position microelectric actuator consists of a control module a stepper motor gearbox assem bly a manual controller use is optional a universal AC input 100 240 VAC 50 60 Hz to 24 VDC power supply and the interconnecting cables The actuator is for use with all Valco and Cheminert two position valves with stops toggling them back and forth between Positions A and B and outputting a position indication at the end of each move Position A is the counterclockwise position as seen when facing the output shaft of the motor Position B is clockwise The actuator is self adjusting no manual valve alignment is necessary The end points of the valve travel are automatically located during a user prompted initialization sequence which must be run each time a valve is mounted on the motor assembly Refer to page 4 Actuator torque and speed are functions of the particular posi ine ga E gearbox motor controller combination which is designated as ee eee nee coe Model EQ EH EP ED ET or EB in order of increasing torque FQ 27 Ib in 0 3 Nm decreasing speed Models EQ EH ED and ET have unique EH 7 0lb in 08Nm gearboxes Models EP and EB have EH and ET gearboxs re A Ibai 102 WN spectively with the motor traveling at a slower speed to provide O EP 9 0 Ib in
13. e to do some special wiring to support the two wire mode required for the Valco E2CA Another issue is related to flow control Some adaptors require the use of the serial port signal RTS to switch the adaptor s RS 485 output from receive to transmit In that case you will need to enable the hardware handshaking control for that adaptor to work The third issue to consider is termination While most applications will work fine without any termina tion if the cable length is hundreds of feet and the baud rate is set very high then the termination is recommend for the two farthest end points of the cable drop It should not be used for devices in between The actuator includes a switch which will enable and disable termination Refer to Setting the Serial Port Configuration Switch on the previous page For details covering the implementation of your specific RS 485 hardware port or adaptor please consult the device s user manual Software The RS 485 option involves three minor software adaptations to the RS 232 protocol First the ID range is extended to include the characters A through Z Upper and lower cases are treated as the same ID The second change is that an ID is required either numbers from 0 to 9 or letters from A to Z and therefore must be included in all commands If the actuator has already been set to an ID other than the factory default of Z that ID will be retained otherwise the ID will be set to the Z defa
14. lfunction Digital Outputs There are two separate outputs for each position indication a digital output and an isolated relay contact output for both Position A and Position B Only one set of these outputs is asserted at a time For a Position A indication pin 3 is driven to a logic low and pins 7 and 8 are shorted for the isolated relay contact output while pin 4 is at a logic high and pins 9 and 10 are open For a Position B indication pin 4 is driven to a logic low and pins 9 and 10 are shorted while pin 3 is at a logic high level and pins 7 and 8 are open If there is a positioning error due to valve sticking clamp ring slippage or re initialization both Digital I O Cable digital outputs are set to the OFF state high logic level Pin Signal Description and both relay contacts are open Digital Inputs There are two digital inputs pins 5 and 6 which can be driven by a 5 volt 1 5 milliamps TTL CMOS logic signal by an open collector driver or by a switch or relay used to short the signal to the ground on Pin 1 All input signals must be Position A input asserted or deasserted for a minimum of 30 milliseconds 6 Position B input to be properly recognized and processed Any signal once asserted that is held or reasserted is ignored Poe ose ue c e Position A relay contact output aution es ET LS ee Ee Pe eer er Tere 9 Position B relay contact output Do not connect any voltage signal above 5 VD
15. puts are deasserted or turned off Discussion of digital control begins on page 8 Serial Control of the Actuator Establishing Serial Communications NOTE For RS 485 information refer to Serial Control RS 485 Option on page 6 Items required e Terminal emulation or communication software such as Valco s VCom or Windows Hyper Pin __RS 232 RS 485 DB9 Terminal running on a PC compatible computer e Valco cable assembly l 22697 or equivalent 1 Connect the l 22697 cable to the actuator as indicated in Figure 1 and set the serial port at 9600 baud NO with VICI cable 1 22697 parity 8 data bits 1 stop bit no hardware or software handshaking Valco s VCom software automatically sets the serial port to these defalult settings 2 With the software running check the bi directional communication link between the keyboard monitor of the computer and the serial port by typing VR lt enter gt If the link is functioning and an actuator ID has not been set a message similar to the following will appear on your monitor giving the program number and date of the actuator firmware l PD E t F56R xx t actuator Model Q H P D T or B xx revision letter and suffix 08 06 2009 Month first zeros are included in the response If there is no response it is possible that the ID has already been set To force a response from a device with an unknown ID type VR lt enter gt The asterisk is a wild card ID substitute which
16. state input meaning that a low signal asserted on pin 5 causes the actuator to move to Position A A high signal deasserted on pin 5 causes the actuator to move to Position B Pin 6 is used as an enable disable pin to prevent startup irregularities The actuator is normally disabled when pin 6 is in its high deasserted state it must be pulled low asserted to enable the actuator to move Mode 4 state mode with enable This mode differs from Mode 3 only in the status of pin 6 As in Mode 3 a low signal asserted on pin 5 causes the actuator to move to Position A and a high signal deasserted on pin 5 causes the actuator to move to Position B However in Mode 4 the actuator is normally enabled when pin 6 is in its high deasserted state It is disabled only when pin 6 is pulled low asserted which is the opposite of how it works in Mode 3 Mode Setup To set the actuator mode connect it to an RS 232 serial port as described in the section Establishing Serial Communications on page 4 To see the current setting enter the SM command as shown in the Serial Commands chart on page 5 To change the mode enter SMn where n is a number between 1 and 4 Mode settings are saved when the actuator is powered off Setting the Model Switch The setting of the switch determines the serial port response seen to the VR command Most end users will never need to perform this procedure since the control module will be properly configured for the
17. ult The third adaptation is that all commands must include a forward slash as the start of message character Example The VR lt enter gt command used in the RS 232 protocol becomes ZVR lt enter gt in the RS 485 protocol where Z is the current ID of the device The RS 485 port on the host computer or controlling device generally includes terminating resistors so only the actuator on the end of a long communication network needs to have its termination switch set to the On position Digital Control of the Actuator The digital input output interface operates at 5 VDC signal levels and provides a limited amount of power that can be used for an external user interface The asserted or ON state for all output or input signals is a low voltage logic level typically between 0 and 8 VDC The deasserted or OFF state is a high voltage logic level typically between 4 and5 VDC This type of logic is referred to as negative true logic All inputs have 5K ohm pullup resistors for a disconnected default OFF state Power output Pins 1 and 2 provide ground and 5 VDC respectively with a maximum allowable current draw of 100ma Caution Do not connect the 5 VDC output to the power output on any external device as this may cause permanent damage to the controller Also be sure that anything connected to the 5 VDC connection does not draw more than 100 ma of current Excessive current draw can cause the controller to ma
18. verage DC current requirement is 2 5 amps Standby current draw is 60 milliamps The actuator should not share a power supply with other noise sensitive devices as the high current draw may cause problems for these devices Motor driver output is through the five pin connector pins 1 2 4 and 5 carry the stepper motor phase drive signals Pin 3 is grounded and tied to the cable shield to reduce electrical noise Two three pin connectors are used for the serial port control They are connected in parallel to facilitate implementation of multidrop applica tions Information on serial control of the actuator begins on page 4 Table 3 Cable functions The ten pin connector is for digital inputs and outputs A digital control system can operate and monitor the actuator through this port The manual controller can be attached to the same connector and has a pass through connection so it can be used along with an external control system Digital control of the actuator is discussed beginning on page 8 Mounting The actuator should be oriented so that any potential leakage of liquid from the valve or fittings flows away from rather than into the actuator right Figure 2 provides the mounting dimensions for the stepper motor gearbox assembly and control module 3 4 for EH Jee gt 4 4 for ET He N
Download Pdf Manuals
Related Search