SCHMIDT Programming Tool SS 20.4xx Instructions for Use

Transcription

1 SCHMIDT Programming Tool SS 20.4xx Instructions for Use

2 SCHMIDT Programming Tool SS 20.4xx Table of Contents 1 Important Information Field of Application Scope of Delivery Programming Box SS 20.4xx Putting the Programming Interface into Operation Programming Tool Operation CE Declaration of Conformity Imprint: Copyright 2006 SCHMIDT Technology All rights reserved. Version and Release Date: Version 1.2 of May 2006 Instructions for Use Programming Tool SS 20.4xx Page 2

3 1 Important Information These instructions for use must be read completely and observed carefully, before putting the unit into operation. Any claims under the manufacturer's liability for damage resulting from non-observance or non-compliance with these instructions will become void. Tampering with the device in any way whatsoever - with the exception of the designated use and the operations described in these instructions for use - will forfeit any warranty and exclude any liability. The unit is designed exclusively for the use described below (s. chapter 2). In particular, it is not designed for direct or indirect personal protection. SCHMIDT Technology cannot give any warranty as to its suitability for a certain purpose and cannot be held liable for errors contained in these instructions for use or for accidental or sequential damage in connection with the delivery, performance or use of this unit. Instructions for Use Programming Tool SS 20.4xx Page 3

4 2 Field of Application The SS 20.4xx Programming Interface allows the function of sensors of the SS 20.4xx sensor family to be checked. In addition, the RS232 interface inside the sensor allows some sensor properties to be configured, operating and measuring data to be read out and displayed in a user-friendly window. The Programming Interface is merely intended for the functional test and for the configuration of the sensor. A permanent field operation or as hand-held device is not recommended. 3 Scope of Delivery The Programming Interface contains the components shown below. Upon receipt, please check the contents for completeness. - Programming box SS 20.4xx - 9V block battery - RS232 interface cable (excluding handshake) - CD containing programming tool and drivers - Instructions for Use Instructions for Use Programming Tool SS 20.4xx Page 4

5 4 Programming Box SS 20.4xx 4.1 Structure and connections The programming box SS 20.4xx consists of a handy, ergonomically shaped housing having the following functional parts (see above figure): - Connections for external components at the top front side of the housing: [1] For a sensor of the SS 20.4xx type: Type: Binder, series 712 (male, 7-pin, shielded, with M9 screw-type lock) [2] For the power supply via an external plug-in power supply unit: Type: 3.5mm jack plug socket (mono) [3] For the RS232 interface connection to the PC: Type: SubD9 socket (female) Instructions for Use Programming Tool SS 20.4xx Page 5

6 - Display and operating elements on the front of the housing: [4] RS232 activity (one LED each for RxD and TxD) [5] Switching states of both switching outputs of the connected sensor (one LED each per output) [6] Flow signal output of the connected sensor (bargraph display containing 10 LEDs) [7] Power LED [8] Rocker switch for switching on the programming box with simultaneous selection of the signal output type of the sensor (voltage or current) 4.2 Power supply of the programming box The programming box requires its own power supply for operation: - Voltage: 9V ±20% - Required current: 50mA max. (including sensor) Make sure that the maximum allowed operating voltage is not exceeded. Higher voltages may destroy the electronics. The power can be supplied in two ways: - For high mobility (e.g. for startup in the field), the box can be supplied internally with power by a 9V block battery or an accumulator of the same design. The battery compartment is at the rear of the box. When operating the device by battery, make sure that it is always charged. - Alternatively, the programming box can be suppled by an external power supply unit (not included in the scope of delivery) via a 3.5 mm monojack socket [2]. Instructions for Use Programming Tool SS 20.4xx Page 6

7 Ensure correct polarity of the operating voltage at the jack plug (see figure opposite). GND +9V When using an external power source, a built-in battery does not have to be taken out, since plugging in the jack plug will automatically switch to the external supply. Therefore, a built-in accumulator cannot be charged via the external connection. After connecting or installing the energy source, the programming box can be switched on on the rocker switch [8]. For a functional test of the box in the absence of a sensor, it is immaterial whether the switch position Voltage or Current is pressed, since this merely distinguishes between the available output types "Voltage" or "Current" of the sensor analog signal. If a sufficient energy supply has been connected correctly, and the box is intact, the green Power LED [7] will light up, signalling the functional readiness. All other luminous diodes remain off, as long as neither a sensor nor a PC is connected. 4.3 Power supply of the programming box The programming box allows the function of the sensor connections to be checked by means of a luminous diode based display area, even independently of the PC. To avoid technical problems, you should always switch off the programming box, before connecting a sensor or disconnecting it from the box. Always switch off the programming box, before plugging in or pulling a sensor. After the sensor has been connected and the programming box has been switched on (observe signal type setting: Voltage or Current), the Power LED [7] will signal readiness of the device. A wrong setting of the signal type is not critical Instructions for Use Programming Tool SS 20.4xx Page 7

8 for the sensor and the programming box technically speaking, but the sensor signal will be displayed incorrectly on the analog display of the box, since its load resistances and amplifications will differ, depending on the signal type 1. Ensure the correct signal type of the sensor (voltage or current) when switching on the box, since otherwise the analog display will show wrong values. In the section Sensor [5], the status of the sensor switching outputs OC1 and OC2 can be checked by means of two red luminous diodes. A single LED will light when it is switched by its corresponding switching output, which has been designed as an open collector, against earth. In the section RS232 [4], an active communication between sensor and PC is signalled by flashing of both LEDs RxD and TxD. In the Analog Out section [6], the analog output signal of the sensor (flow) is represented quasiproportionally and absolutely in the dot mode 2 by means of a 10-digit green LED bargraph display. Of these, each LED corresponds to an approximately 10 percent interval of 10V or 20mA of the analog sensor signal. The relationship between the absolute analog signal range and the corresponding LED can be seen from the following table. 1 For example, a 5V output is not capable of driving the 300Ω load of the current input of the box of up to 20mA. 2 Only the LED corresponding to the current analog value will light up. Instructions for Use Programming Tool SS 20.4xx Page 8

9 Sensor signal output Voltage range [V] Current range [ma] Programming box LED lighting up [No.] 0... < < 2 / 1... < < < < < < < < < < < < < < < < < < 20 9 >= 10 >= Only in the "bottommost" interval, defined as < 1V or < 2mA signal, will no LED light up. In contrast, the "topmost" 10th LED will not light up until the signal amplitude of 10V or 20mA is reached or exceeded. This means that the display of the flow velocity ranges by the individual LEDs depend on the measuring range of the sensor, the type (voltage or current) and amplitude of its signal output and from the display of the flow direction in bidirectional configuration. For example, for a unidirectional sensor having a 4-20 ma interface, the fourth LED will light up from the very start at zero flow (which corresponds to 4mA). Only the upper 16mA display the measuring range of the sensor proportionally. However, in a bidirectional sensor having a 10V voltage output and a zero point display in the middle of the measuring range, i.e., at 5V, the fifth LED will be lit at zero flow. The positive flow range will then be displayed by luminous diodes 6-10, whereas the negative flow intervals will be signalled by LEDs 4-1. Instructions for Use Programming Tool SS 20.4xx Page 9

10 5 Putting the Programming Interface into Operation 5.1 System requirements for PC Operating system: Processor: RAM: Hard disk memory: Windows 2000 / XP Pentium III / Celeron of at least 600MHz 128 MB 155 MB 5.2 Installation of the software Before putting the Programming Interface into operation, you first have to install the programming tool. The CD included in the delivery contains all files necessary for operation. Insert the CD into your drive and open the "setup.exe" file. The installation program will now be executed, please follow the on-screen instructions. To start the software, please click on: Start / Programs / SCHMIDT Technology / Sensor Programming Tool 5.3 Connecting the programming box After starting the software, connect the SubD9 plug on the housing of the programming box to the desired COM port at the PC via the delivered RS232 cable. Before plugging the SS 20.4xx sensor into the connecting socket [1], make sure that the programming box is off ([7], [8]). Always switch off the programming box, before plugging in or pulling a sensor. Now switch on the device on the rocker switch [8] using the correct signal type (setting: Voltage or Current). Communication with the sensor via the PC is now possible. Instructions for Use Programming Tool SS 20.4xx Page 10

11 6 Programming Tool Operation The programming tool SS 20.4xx allows you to change important function parameters of your sensor SS 20.4xx and to read out and analyse measured values. To do so, please start the program Programming Tool SS 20.4xx in the start menu. This will open the main window of the software (see figure opposite) The upper fourth of the window contains the operating and display elements for configuration and status {1} - {6} of the serial interface. Box {7} shows the serial number and box {8} the firmware version of the connected sensor. The left half of the lower window area is exclusively for the configuration of the sensor. The right half of the lower window area shows the measured values and their evaluation. Instructions for Use Programming Tool SS 20.4xx Page 11

12 6.1 Configuration of the RS232 interface After program start, the PortScanning function {1} is off by default (disabled). This allows you first to configure the interface. Select the correct serial COM port at the PC {2} and the desired baud rate {3} (default: 115,200). Then activate the automatic port detection by clicking on the PortScanning box {1}. If the interface settings have been entered correctly, the sensor will be detected {6} immediately and its serial number {7} and firmware version {8} displayed. If instead the PortScanning LED {4} is flashing, the PC cannot find the sensor. This can have several causes: 1) No sensor has been connected to the box: Connect a functioning sensor. 2) The programming box has not been switched on or has not been supplied with (sufficient) energy: If the Power LED [7] is not lit, switch on the box or establish a safe energy supply. 3) The connection between the programming box and the PC has not been established: Connect the RS232 cable (correctly). 4) The wrong COM port was selected: Select the correct port in the drop down list of the port selection {2} and plug the RS232 cable into the correct port. You can also perform the troubleshooting during the active PortScanning until the sensor is found. The scanning process can be cancelled at any time by pressing the Stop PortScan button {5}. Instructions for Use Programming Tool SS 20.4xx Page 12

13 6.2 Configuration of the sensor In the sensor configuration area in the left half of the main window, the behaviour of the sensor or of its signal quality {9} and its switching outputs {10} and {11} can be set (see figure opposite). Under the Signal Quality tab {9}, the interval between individual measurements can be changed in millisecond steps by shifting the Sampling Time control. The Average control determines the number of individual measurements used for averaging 3. A higher value produces a smoothing of the signal and a delayed response of the sensor. Signal Quality {9} OC1 {10} OC2 {11} The graph of the signal quality in the subwindow designated "Signal Quality" is not based on the measured values of the sensor, but is only a visual demonstration of how the noise is affected by the averaging. 3 Filtering by sliding arithmetic average. Instructions for Use Programming Tool SS 20.4xx Page 13

14 The switching thresholds of the sensor can be reprogrammed in the same way. On the one hand, the absolute value of the switching threshold can be programmed within the limits of the measuring range. Directly in the section called Change Switching Threshold OCx [mm/s], the threshold value can be typed in directly on the keyboard either in the numeric box or set with the mouse via the control executed as slider. In a unidirectional sensor, the threshold value can only be positive, including the zero. In a bidirectional sensor, the threshold value can also be negative, in which case it will be in the backflow area. The negative absolute value also applies when the analog output of the sensor only outputs the magnitude of the velocity signal and signals the direction via OC1. However, in this case, the output OC1 is fixed to its function as direction indicator and cannot be configured to any desired value as the threshold. Owing to this special feature, the operating software has a special drop down menu in the upper region of the Switching Channel OC1 tab, which allows the switching behaviour of OC1 to be adapted to the zero flow hysteresis of the sensor in the case of direction display (see following figure). OC1 switching profile configuration On the other hand, the switching polarity of both outputs (switches from Low / High to High / Low, when the value ex- Instructions for Use Programming Tool SS 20.4xx Page 14

15 ceeds / drops below High / Low can be changed by pressing the Change OC x Activity button. The set switching profile is shown by way of symbols in the diagram opposite. The following applies to all configurations to be programmed: For values to be programmed, the box (button or control) to be actuated must be released above the box. As long as the sensor is being programmed to the new value or the new configuration (duration about 2-3s), the red Programming LED will be lit and no measured values will be updated by the sensor (see following figure). Programming LED Instructions for Use Programming Tool SS 20.4xx Page 15

16 6.2.1 Response time configuration example Example 1: The sensor is supposed to measure at high dynamics. Whenever the threshold value is exceeded for a short period, this must be signalled by triggering the corresponding switching output and the signal must be active at the analog output. Sampling Time: 1 Average: 0 Example 2: The sensor is supposed to respond quickly, but the analog measuring signal must be as constant as possible so as to be able to absorb extremely quick peaks. Sampling Time: 1 Average: 5 Example 3: The sensor is supposed not to respond at all to short-time variations, the required signal must have maximum constancy. An alarm is not triggered until a safely confirmed value is obtained: Sampling Time: 10 Average: Get sensor default values Default values for all parameters relevant to operation have been stored in the sensor. If wrong settings give undesired results or the sensor no longer responds at all, the operational status of the sensor can in most cases be restored by resetting it to the factory settings. To do so, press the Get Sensor Defaults button {16}. Instructions for Use Programming Tool SS 20.4xx Page 16

17 6.2.3 Diagnostic function In order to be able to determine the cause of a possible sensor fault more easily, the software is equipped with a diagnostic function, which is activated by pressing the Diagnostic button {18}. The software reads out all internal sensor parameters and writes them to a file in the c:\temp\ folder. The name of the file is generated automatically and is made up of the current date and the serial number of the sensor (example: 03_02_2005_SN12345.dat). Please send this file to SCHMIDT Technology GmbH when an error occurs. There the problem can be analysed within a short time and the relevant measures can be initiated. 6.3 Display area The left half of the main window contains various display elements, which can be used to observe the response of the sensor to the set configurations by reproducing and analysing current measurement values. Displays {12} Graph {13} Signal Quality {14} Instructions for Use Programming Tool SS 20.4xx Page 17

18 Upon clicking on the Displays tab {12}, an interface opens containing two analog pointer elements. The top scale containing the blue pointer represents the currently measured flow velocity in real time (taking into account the set response time of the sensor). The bottom scale containing the red pointer indicates the medium temperature measured in the sensor head. The OC1 (Direction) luminous diode indicates the OC1 switching state. Upon clicking on the Graph tab {13}, the flow velocity is shown continuously as a curve display. Upon clicking on the Signal Quality tab {14}, the variations of a constant flow velocity can be detected and displayed via a definable measuring interval. The interval is defined by the number of values to be measured in the # of values box. The scanning of the signal is then started by clicking on the Examine Signal button. The degree of turbulence seen by the sensor is calculated from the average value and the standard deviation of these measured values. The displayed and calculated values are affected by the settings established on the sensor. The measured values are displayed in an automatically scaled histogram. Under laminar flow conditions, a sufficient number of measured values (at least 100) will typically give a Gauss distribution. The values shown under the Signal Quality tab {14] have been calculated only from the signal visible at the sensor and can differ from the real state of the flow. Instructions for Use Programming Tool SS 20.4xx Page 18

19 7 CE Declaration of Conformity Instructions for Use Programming Tool SS 20.4xx Page 19

20 SCHMIDT Technology GmbH Feldbergstrasse 1 D St. Georgen Phone +49 (0)7724/899-0 Fax +49 (0)7724/ info@schmidttechnology.de Part No Instructions for Use Programming Tool SS 20.4xx Page 20