Related Manuals for SBC PCD3.W7x0
Summary of Contents for SBC PCD3.W7x0
- Page 1 Manual Integrated weighing and metering system PCD2.W7x0 and PCD3.W7x0 Document 26-833 | Edition ENG07 │ 2018-10-18...
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Page 2: Table Of Contents
Saia-Burgess Controls AG Content Content Content Document History ................... 0-2 Brands and trademarks .................. 0-2 Hardware Features ......................1-1 Operation ......................1-2 Technical data ....................1-3 1.3.1 Wiring ......................1-4 Functional description ..................1-4 Signal processing .................... 1-5 Programming Function boxes ....................2-1 2.2. -
Page 3: Document History
Saia-Burgess Controls AG Content Document History Date Version Changes Remarks 2005-09-31 EN02 completely First Publication 2007-12-13 EN03 Chapt. Ch02 - Data to Scale (only W710) deleted. Chapt. Ch03 - Scale with calibrated weighing cells removed 2007-11-05 EN04 Chapt. Ch01.3 Different connectors for PCD1|2 and PCD3 2009-07-02 EN05... -
Page 4: Hardware Features
Saia-Burgess Controls AG Hardware Features Hardware Features The weighing module provides cost-effective solutions for weighing and metering, and optimising material flows and volumes. The PCD2|3.W7x0 module is characterised by the following features: ● Integration: The electronic weighing apparatus is placed on a standard Saia x module. -
Page 5: Operation
Saia-Burgess Controls AG Hardware Operation Operation The PCD2|3.W7x0 module with its associated weighing cells forms one or two independent weighing systems with great precision and impressive functionality. The weighing cells convert mechanical forces into electrical signals, which are processed within the module and turned into physical units of weight. All weighing cells based on the principle of resistance strain gauge bridges can be connected to the weighing module. -
Page 6: Technical Data
Saia-Burgess Controls AG Hardware Technical data Technical data General Resolution: 0.001 % (depending on measuring equipment) Internal resolution: (~1 to 260,000) Linearity: 0.005 % Temperature stability: 0.002 % / °C for cells with 2 mV / V Digital filter in A/D converter: 7.8 Hz to 822 Hz configurable Post-filter in controller: 0.24 Hz to 100 Hz configurable... -
Page 7: Wiring
Saia-Burgess Controls AG Hardware Functional description 1.3.1 Wiring The weighing cells are generally provided with a 1.50 to 2.00 m connecting cable. The wiring to the weighing module is via a 6-core shielded cable and a connection socket, to which several cells can be connected. Maximum length of connecting cable: 100 m X-section for 100 m:... -
Page 8: Signal Processing
Saia-Burgess Controls AG Hardware Signal processing Supply + Sense + Signal + Signal - Sense - Supply - The feed voltage across the jumper is dependent on the performance of the voltage regulation, the jumper current, the length of the feed cable and the temperature. - Page 9 Saia-Burgess Controls AG Hardware Signal processing Digital filter The analogue converter is fitted with a low-pass filter with a configurable threshold frequency between 8 Hz and 800 Hz. This frequency is entered in encoded form from 20 (800 Hz) to 2000 (8 Hz). Post-filter A further low-pass filter can be connected downstream of the converter where required.
- Page 10 Saia-Burgess Controls AG Hardware Signal processing The times listed relate to a step response, i.e. from a sudden full-loading of the scale until the measurement has stabilised. Post-filter=2 Post-filter=5 Post-filter=10 Post-filter=20 1000 60 1300 2000 120 1000 1500 2500 Manual for PCD2|3.W7x0 │ Document 26-833 ENG07 │ 2018-10-18...
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Page 11: Programming Function Boxes
Saia-Burgess Controls AG Programming Function boxes Programming Function boxes The deployment of one or more weighing modules is simplest with the FBoxes WM_Master, WM_Config, WM_Weigh and WM_Status. The FBoxes WM_Config, WM_Weigh and WM_Status are all available with both dynamic and static inputs. In a FUPLA environment, the FBoxes with dynamic inputs are generally used. - Page 12 Saia-Burgess Controls AG Programming Function boxes WM_Master Ths FBox is only programmed once in a weighing application. It controls the entire data traffic from all weighing FBoxes to all weighing modules. In the Master Box, the data sent to the modules and the data read from the modules is collated, checked and passed to the application.
- Page 13 Saia-Burgess Controls AG Programming Data interchange WM_Config The configuration of a weighing module is carried out once when the weighing application is commissioned, or it can be repeated if necessary, if an operating parameter changes. All configuration parameters are entered in the Adjust window for the FBox, where they can be changed online or offline.
- Page 14 Saia-Burgess Controls AG Programming Overview WM_Weigh Weighing and zeroing the scale are controlled by the FBox WM_Weigh. This Box always returns a result, whether or not the scale has already reached the final weight. The Status Box is used to determine the status of the scale. If a “1” ap- pears at the “Still”...
- Page 15 Saia-Burgess Controls AG Programming Overview WM_Status The status of the scale is determined with the FBox WM_Status. The main states of the scale are: ● The scale is working correctly ● Nothing on the scale (empty) ● The scale is still (with or without anything on it) A further feature is the stability of the scale.
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Page 16: Data Interchange Between Saia
Saia-Burgess Controls AG Programming Overview 2.2. Data interchange between Saia PG5 FBoxes and weigh- ® ing modules Manual for PCD2|3.W7x0 │ Document 26-833 ENG07 │ 2018-10-18... -
Page 17: Overview
Saia-Burgess Controls AG Programming Overview Overview Inputs Command flags Saia PG5 FBox Resources Outputs ® →LIFE_FLAG LifeFlag FBox →Timeout Timeout WM_Master →Address Address Config SET_AMPLIFICATION→ ←AMPLIFICATION SET_DFILTER→ ←DFILTER SET_PFILTER→ ←PFILTER FBox SET_GAP→ ←GAP WM_Config SET_EMPTY→ ←EMPTY SET_AUTOZERO→ ←AUTOZERO SET_LOWPASS→ ←LOWPASS CONFIGURATION→... -
Page 18: Configuration
Saia-Burgess Controls AG Configuration Configuration The weighing module will only work correctly if the necessary parameters are present when the module is started up. These parameters are permanently stored in the module and are automatically passed to the A/D converter and the computer at start-up. - Page 19 Saia-Burgess Controls AG Configuration Weight considered as empty Empty Empty indicates the maximum weight used to assess whether the weighing vessel is empty. One unit represents roughly the nominal loading of the cell divided by 30,000, i.e. for a 20 kg weighing cell, one unit will be approx. 0.7 grams. Enable Autozero Autozero With A utozero equal to “1”, the scale is automatically reset to zero if it is empty.
- Page 20 Saia-Burgess Controls AG Configuration Functions of the weighing module Zero_calibration Zero (WM_Weigh) This command calibrates the scale to its empty state. This takes account of all errors in the weighing system and the weight of the empty vessels (tare). This command is normally executed just before the container is filled (this operation can also be performed automatically).
- Page 21 Saia-Burgess Controls AG Configuration Operation: Time window 250 ms Acquisition cycles with a small time constant T (Time observed) Change of weight in the time observed • 1 sec. Differential weight = Stability of the scale Noise (WM_Status) The instability of the weighing system can be read with a positive signal edge at the Noise input to the FBox WM_Status.
- Page 22 Saia-Burgess Controls AG Configuration Status signals: ● Still is an output that indicates when the item is stable on the scale, i.e. the noise is less than the value defined as the Gap. Still equal to “1” indicates that a stable value for the weight can be read off. Of course it is also possible to read off all intermediate values for an increasing or decreasing weight.
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Page 23: Operation Of The Weighing Module Commissioning
Saia-Burgess Controls AG Operation of the weighing module Commissioning | Operation Operation of the weighing module Commissioning The commissioning of a weighing channel involves two steps: Configuration of the scale Scaling of the equipment Configuration The configuration procedure is described in detail in the section on Configuration (WM_Config). -
Page 24: Appendix Icons
Appendix Saia-Burgess Controls AG Icons Appendix Icons In manuals, this symbol refers the reader to further information in this manual or other manuals or technical information documents. As a rule there is no direct link to such documents. This symbol warns the reader of the risk to components from electrostatic discharges caused by touch. -
Page 25: Contact
Contact Saia-Burgess Controls AG Bahnhofstrasse 18 Switzerland 3280 Murten, Telephone switchboard ... +41 26 580 30 00 Telephone SBC Support ..+41 26 580 31 00 Fax .......... +41 26 580 34 99 Support support@saia-pcd.com E-mail Support: ...... www.sbc-support.com Support site: ......
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