Analog Amplifier FAA-27 Technical Manual Flintec GmbH Bemannsbruch 9 74909 Meckesheim GERMANY www.flintec.
Table of Contents 1. Safety Instructions ........................................................................... 2 2. Declaration Of Conformity ............................................................... 3 3. Front View, Features And Specifications ......................................... 4 4. Installation And Commissioning ....................................................... 7 4.1 Mechanical Installation .................................................................. 8 4.
RIGHTS AND LIABILITIES All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, mechanical, photocopying, recording, or otherwise, without the prior written permission of Flintec GmbH. No patent liability is assumed with respect to the use of the information contained herein. While every precaution has been taken in the preparation of this book, FLINTEC assumes no responsibility for errors or omissions.
2. Declaration of Conformity FAA-27, Technical Manual, Rev. 1.
3. Front View, Features and Specifications Microcontroller based analog load cell transmitter FT-27 has very high accuracy and long term stability with its high tech design. Its high performance electronic calibration via RS232C serial port without any test weight and fast calibration without measuring output signal give big advantage to the users for calibration scales.
Meanings of the positions of rotary switches; Programming (Prog) switch Adjustment (Adj) switch V Voltage output type run (refer to page 9) I Current output type run (refer to page 9) S1 Setpoint 1 adjustment (refer to page 17) S2 Setpoint 2 adjustment (refer to page 17) Z Zero adjustment (refer to page 11) G Gain adjustment with test weight (refer to page 11) ZF Fast zero adjustment (refer to page 13) GF Fast gain adjustment with 20% test weight of Maximum scale capacity (refer to
TECHNICAL SPECIFICATIONS Analogue input range 0 mV to 20 mV Min. input range < 1 mV Linearity < % 0.01 Temperature drift < 0.007 % FSR / ºC Converters 24 bit Delta-Sigma ratiometric ADC with integral analog and digital filters 16 bit very low drift DAC Internal resolutions 16 000 000 counts ADC External resolution Analogue output changes up to 65000 steps Calibration With rotary switches in the front with any test load. Fast calibration with 20% max. Electronic calibration via PC.
4. Installation and Commissioning Recommendations Warning: Please care the following warnings for designing the control cabinet which will increase your system reliability. The control cabinet should be designed so that instrument can operate safely. The panel should be placed in clean area, if possible not getting direct sun light, with a temperature between -10 ºC and +40 ºC, humidity not exceeding 85% noncondensing. All external cables should be installed safely to avoid mechanical damages.
4.1 Mechanical Installation The place where you will use/install your instrument should be clean, not getting direct sunlight if possible, with a temperature between -10ºC and +40ºC, 85% maximum relative humidity non-condensing. Install the instrument on the DIN rail in the cabinet. The instrument mechanical drawing 4.2 Load Cell Connection The load cell wiring should be made carefully before energizing to avoid damages of the instrument and load cells.
Pin Name Definition I Current Output V Voltage Output G GND Shield Current output connection Voltage output connection 4.4 Changing the Analogue Output FAA-27 sets its analog output according to the table below at power on. Turn the programming switch and connect TxD and RxD pins as indicated in the table below before power on the instrument to set analog output type and its signal level. Analogue Output Range Prog.
You can also set the analog output type after power on as; Turn the programming switch to the analog output type ( to V or I position ) Connect or disconnect TxD and RxD pins according the table above to set the output range. Turn the adjustment switch to the position. After 2 seconds turn in back to the “0“ - position ( if the instrument is powered on before ). The analogue output type can be followed by the V / I LED on front of the instrument after running it ( refer to table above ) .
5. Adjustments 5.1 Adjustment with Rotary Switches To start the adjustment the programming switch should be at analog output type position, V or I. Z and G positions of the programming switch are used for performing zero and gain adjustments in sequence. Analog output is changed by turning the adjustment switch as described in the table below.
Use the formula for calculating the analog output value Analog Output = Minimum output + Example: Scale capacity Output range Load Maximum output – Minimum output Scale capacity * Load 100kg 4 – 20 mA 25kg The 4-20mA analog output current will be at 25kg ; I out = 4mA + (( 20mA – 4mA ) / 100kg ) * 25kg = 4 + 0.16 * 25 = I out = 8mA The 0 – 10VDC analog output voltage will be at 25kg: V out = 0 + (10V / 100kg ) * 25kg = 0,1 * 25 = V out = 2.
5.2 Fast Adjustment To Nominal Output Range You may perform fast adjustment method if you will set zero and gain to analog output nominal values. This feature gives advantage to the instrument for small and medium capacity weighing systems’ fast and easy adjustment. Fast Zero Adjustment: Unload the scale. Turn the programming switch to ZF position. Turn the Adj. switch to position and turn it back to 0 - position 2 seconds later.
5.4 Adjustment (eCal) With PLC All instruments are adjusted in the production to operate in its analog output range between 0mV and 10mV load cell signal as default. For example, if the instrument is at factory default values and programmed to operate 4 – 20mA output range, the output will be 4mA at 0mV load cell signal and will be 20mA at 10mV load cell signal (only for 2mV/V load cells). Changing the FAA-27 instrument a recalibration is not required due to matching instruments in production by Flintec.
2. eCal procedure steps: Descriptions Step 1 START eCal Command: Response: Start the eCal process. ACK @011000000001020001EB @011000000001EE Step 2. Total Load cell Emax entry Command: @01100003000204000001F4F1 Response: @011000030002EA Total LC is 500kg. ACK Step 3. Average Load cell mV/V entry Command: @0110000500020400004E2F67 Response: @011000050002E8 LC sensitivity: 2.0015mV/V. ACK Step 4. Estimated Dead load entry Command: @0110000700020400000000E2 Response: @011000070002E6 Dead load is 0kg.
4. Load Factory Defaults: Command: Response: Descriptions @011000240001025AA5C9 @011000240001CA Set to factory default. ACK CHECKSUM CALCULATION : CSUM = 0 – (Slave_Add + Function + … + Last_data) (STX and CSUM are neglected while calculating CSUM) Example For Medium (1) filter: @011000220001020001XX CSUM = 0 – ( 01+10+00+22+00+01+02+00+01) = 0 – 37 = C9 Command is @011000220001020001C9 < Carriage Return > 5.
6. Setpoints 6.1 Setpoint Connection FAA-27 has 2 free relay contact output. These outputs can be connected to maximum 230VAC or maximum 30VDC, maximum 1A loads. Reverse diode connection to the DC loads is recommended to increase the relay contact life and to reduce the disturbances. Outputs connection is; 6.2 Setpoint Adjustment The instrument closes the relay contacts if the weight value is higher than the adjusted setpoint.
7. Operation There are 3 LEDs and 2 rotary switches on the front panel of FAA-27. The rotary switches are being used for adjustment as described in chapter 4.4 and the LEDs have different meanings in operation and setup type as indicated below. TxD & RxD pins V / I LED (after power on) 4 - 20mA Open circuited On 0 - 20mA Short circuited Off 0 - 10VDC Open circuited Flash 0 - 5VDC Short circuited Blinking Analogue Output Range Prog. Switch position Adj.
8. Programming With xFace Software Over RS232 FAA-27 has RS232C serial interface to perform eCal electronic calibration and to adjust filter, setpoint values and to follow status by using xFace software installed on a PC. For installing the xFace software, which is supplied with the instrument or can be downloaded from www.flintec.com, follow the steps described below. 8.1 8.2 Installation Of xFace Software Close all applications on your PC Insert the CD that contains the xFace software v2.
4. Select the analog output type. 5. Enter Total Load Cell capacity, Average Load Cell Output, Scale Capacity and Estimated Dead Load. 6. Press “Write eCal Data to Transmitter” button on the monitor to perform eCal. 7. Unload the scale and Press “eCal with Zero Adjustment“ button on the monitor. 8. Adjust filter value and setpoints in section “Setup”. 9. In section “Status” instrument information are available. 10. Power off the instrument before disconnecting from PC.
9. Trouble Shooting The type FAA-27 amplifier is designed as a very reliable and virtually error free instrument. However, if an error occurs, do not attempt to repair the equipment before you understand what caused the error. Note the status of the front panel LEDs, and try to find the problem with the help of the table given below. Do not let unauthorized people interfere with the instrument.
