SIEMENS S7-300 SIWAREX FTA (Flexible Technology, Automatic Weighing Instrument)

SIWAREX FTA (Flexible Technology, Automatic Weighing Instrument) is a versatile andSIWAREX FTA flexible weighing module for industrial use. It can be used in both non-automatic and automatic weighing operation, for example the production of mixtures, and for filling, loading, monitoring and bag filling.

It has the corresponding scale approvals and is also suitable for legal-for-trade weighing systems.

The SIWAREX FTA function module is integrated in SIMATIC S7/PCS7, and uses the features of this modern automation system, such as integrated communication, diagnostics and configuration tools.

Product No. / Product DescriptionListprice / Your price
7MH4900-2AA01
SIWAREX FTA WEIGHING ELECTRONIC WITH VERIFICATION CAPABILITY.FOR AUTOMATIC AND NON AUTOMATIC . WEIGHING APPLICATIONS. USABLE FOR S7-300 AND ET200M. EC-CERTIFICATE OF CONFORMITY 3 X 6000D. . APPLICATIONS: . RAPID DOSING, FILLING/BAGGING AND LOADING. ATTENTION: FOR LEGAL FOR TRADE APPLICATIONS PLEASE FOLLOW THE LOCAL LAWS APPLYING IN THE COUNTRY OF LEGAL VERIFICATION ! – APPROPRIATE MMC-CARD: ONLY FOR LEGAL-FOR-TRADE APPLICATIONS R76, R51 AND R107: 7MH4900-2AY20

Benefits

SIWAREX FTA is characterized by the following features:

  • Uniform design, and totally integrated communication in SIMATIC S7 and SIMATIC PCS 7
  • Uniform configuration with SIMATIC
  • Direct use in the SIMATIC automation system
  • Use in distributed plant concept through connection to PROFIBUS DP/PROFINET using ET 200M
  • Measurement of weight or force with high resolution of 16 million intervals
  • High accuracy 3 x 6 000d, legal-for-trade
  • Use with analog strain-gage load cells of types SIWAREX R and SIWAREX WL200
  • Alternative option of connecting individual load cells from the manufacturers METTLER TOLEDO, Wipotec and PESA
  • Legal-for-trade display with Windows-based panels, e.g. SIMATIC Comfort Panels
  • Stepless or stepped dosing control
  • Exact switching of dosing signals (< 1 ms)
  • Parameterizable inputs and outputs
  • Parameterizable for highly versatile applications
  • Flexible adaptation to different requirements with SIMATIC
  • Simple adjustment of scale using the SIWATOOL FTA program
  • Theoretical adjustment without adjustment weights
  • Replacement of module without renewed adjustment of scale
  • Recording of weighing sequence
  • Alibi memory with calibration capability
  • Can be used in Ex applications

Application

The SIWAREX FTA weighing module is the optimum solution wherever high demands are placed on accuracy and speed.

Thanks to its outstanding measuring properties, weights can be measured with extreme accuracy in up to three ranges.

SIWAREX FTA can be used to design legal-for-trade dosing systems, such as filling plants, loading stations, bagging stations, rotopackers, mixers or test stations.

Typical fields of application include:

  • Filling of liquids
  • Bagging of solid matter (also big bag)
  • Proportioning as deduction weighing or fill weighing
  • Checking of individual quantities
  • Loading or receiving of materials
  • Static checkweigher
  • Check weigher (in combination with Wipotec load cells)

Design

SIWAREX FTA is a function module of SIMATIC S7-300 which can be directly snapped onto the SIMATIC S7‑300 or ET 200M backplane bus. Thanks to the snap-on mounting rail system, very little work is required to install/cable the 80 mm wide weighing module.

The load cells, the RS 485 serial interface, the analog output and the digital inputs and outputs are connected by means of the 40‑pin standard front connector, the PC (RS 232) by means of a 9‑pin SUB-D connector and the power supply by means of a separate 2-pin connector.

Operation of SIWAREX FTA in SIMATIC enables the weighing system to be completely integrated into the automation system.

SIWAREX FTA

Function

The main tasks of the SIWAREX FTA are the high-precision measurement of the current weight in up to three measuring ranges, and exact control of the weighing procedures.

The weighing module controls the weighing procedures fully automatically. However, integration in SIMATIC means that it is also possible to directly influence the weighing procedures using a PLC program. This means that the tasks can be sensibly divided: The very fast weighing functions are implemented in the SIWAREX FTA, the interlocking and logic functions in the SIMATIC CPU.

Weighing functions

The SIWAREX FTA is easy to parameterize for the various automatic weighing functions.

The following weighing functions can be parameterized:

  • NSW (Non-Automatic Weighing Instrument) according to OIML R76
  • SWA (Automatic Gravimetric Filling Instrument) according to OIML R61
  • SWE (Automatic Catchweighing Instrument) according to OIML R51
  • SWT (Discontinuous Totalizing Automatic Weighing Instrument (Totalizing Hopper Weigher)) according to OIML R107
Monitoring and control of the load cell signals and statuses

During the weighing procedure, the SIWAREX FTA weighing module monitors and controls the load cell signals and statuses. The optimized exchange of data within SIMATIC permits direct evaluation of the load cell signals and statuses in the PLC program.

The SIWAREX FTA can easily be adapted to changes in the system technology thanks to the PLC’s influence on the weighing process.

The SIWAREX FTA is already factory-calibrated. This means that the theoretical adjustment of the scale is possible without adjustment weights, and that modules can be replaced without readjustment of the scale. When using “active bus modules”, replacement is also possible during operation.

Integration in SIMATIC

SIWAREX FTA is completely integrated into the SIMATIC S7 and SIMATIC PCS 7. Users can freely configure their automation solution – including the weighing application.

The right combination of SIMATIC components can produce optimum solutions for small, medium-size and large plants. The scales are operated and monitored using SIMATIC standard operator panels. Needless to say, these operator panels can also be simultaneously used for the operator control and monitoring of the plant.

Customized or sector-specific solutions can be developed extremely quickly using the configuration package and example applications for SIMATIC. The following Figure shows a typical configuration of a medium-size plant.

The ready-to-use function blocks for the automation system and the faceplates for the operator station are used for the configuration in SIMATIC PCS 7.

SIMATIC S7/PCS 7 configuration with SIWAREX FTA

Software

SIWATOOL FTA commissioning software

SIWATOOL FTA is a special program for commissioning and servicing and runs with Windows operating systems.

The program enables the scales to be set without the need for prior knowledge of the automation system. During servicing, the technician can use a PC to analyze and test the procedures in the scale. Reading out the diagnostics buffer from the SIWAREX FTA is extremely helpful when analyzing events.

The following are just some of the tasks that can be carried out using SIWATOOL FTA:

  • Parameter assignment and calibration of the scale
  • Testing of scale properties
  • Saving and printing scale data
  • Recording and analysis of weighing sequence

Settings in SIWAREX FTA software

It is extremely helpful to analyze the diagnostics buffer, which can be saved together with the parameters from the module in a backup file.

The SIWAREX FTA weighing module includes a trace mode for optimization of weighing sequences. The recorded weight values and associated statuses can be displayed as traces using SIWATOOL FTA and MS Excel.

Upgrading firmware

A further program function can be used to download a new firmware version onto the SIWAREX FTA on site. This means that firmware upgrades can be carried out on site as required anywhere in the world.

Reading out of weighing reports

The weighing reports are saved on an MMC (Micro Memory Card) inserted in the SIWAREX FTA for the duration specified by the Weights and Measures Act. If complaints are received concerning a particular weighing procedure, the associated data can be read out of the MMC using SIWATOOL.

SIWAREX FTA – simple configuration

Integration in SIMATIC results in freely-programmable, modular weighing systems which can be modified according to operational requirements.

The ready-to-use SIWAREX FTA software “Getting started” is also available free-of-charge and shows beginners how to integrate the module into a STEP 7 program and offers a basis for application programming. This allows you to connect the scale very easily to an operator panel connected directly to the SIMATIC CPU.

Configuring the legal trade display on the panel

The software SecureOCX is available in systems running WinCC flexible. It provides a function for configuration of the legal trade display directly in WinCC flexible. In the TIA Portal, the software SecureDisplay is used. This is installed directly on a Windows CE-based panel (for example, SIMATIC Comfort Touch series). There is a separate “Getting Started” for using this software in the TIA Portal. This solution requires a SIMATIC CPU with an Ethernet port. SIMATIC Basic and Key Panels cannot be used.

Scale faceplate in the SIWAREX FTA “Getting started” software

In addition, the STEP 7 program SIWAREX FTA Multiscale provides a professional basis for the implementation of batching or filling plants.

Technical specifications

SIWAREX FTA

Use in automation systems

S7-300

Directly or through ET 200M

S7-1500

Through ET 200M

S7-400 (H)

Through ET 200M

PCS 7 (H)

Through ET 200M

Communication interfaces

S7

Through backplane bus

RS 232

For SIWATOOL or printer connection

RS 485

For remote display or digital load cell

Module parameterization

Using SIMATIC S7

Using SIWATOOL FTA software (RS 232)

Measuring properties

EU type approval as non-automatic weighing machine, trade class III

3 x 6 000 d ≥ 0.5 μV/e

Internal resolution

16 million parts

Internal/external updating rate

400/100 Hz

Several parameterizable digital filters

Critically dampened, Bessel, Butterworth (0.05 … 20 Hz), mean-value filter

Weighing functions

Non-automatic weighing machine

OIML R76

Automatic weighing machine

OIML R51, R61, R107

Load cells

Strain gages in 4-wire or 6-wire system

3 characteristic value ranges

1, 2 or 4 mV/V

Load cell powering

Supply voltage US (rated value)

10.3 V DC

Max. supply current

184 mA

Permissible load cell resistance

  • RLmin

> 56 Ω
> 87 Ω with Ex interface

  • RLmax

≤ 4 010 Ω

Max. distance of load cells

When using the recommended cable:

Standard

1 000 m (3 280 ft)

In hazardous area1)

  • For gases of group IIC

300 m (984 ft)

  • For gases of group IIB

1000 m (3 280 ft)

Connection to load cells in Ex zone 1

Optionally via SIWAREX IS Ex interface

Ex approvals zone 2 and safety

ATEX 95, FM, cULUS Haz. Loc.

Auxiliary power supply

Rated voltage

24 V DC

Max. power consumption

500 mA

Current consumption from backplane bus

typ. 55 mA

Inputs/outputs

Digital inputs

7 DI electrically isolated

Digital outputs

8 DO electrically isolated

Counter input

Up to 10 kHz

Analog output

  • Current range

0/4 … 20 mA

  • Updating rate

100 Hz

Approvals

EU type approval (CE, OIML R76)

EU prototype test to MID (OIML R51, R61, R107)

Degree of protection according to EN 60529; IEC 60529

IP20

Climatic requirements

Tmin (IND) … Tmax (IND) (operating temperature)

  • Horizontal installation

-10 … 60 °C (14 … 140 °F)

  • Vertical installation

-10 … 40 °C (14 … 104 °F)

EMC requirements

EN 61326, EN 45501, NAMUR NE21, Part 1

Dimensions

80 x 125 x 130 mm (3.15 x 4.92 x 5.12 in)

Weight

600 g (0.44 lb)