SIWAREX Platform and Hopper Scales
SIWAREX WP521 ST / WP522 ST
The versatile weighing modules for the SIMATIC S7-1500 Advanced Controller family.
With SIWAREX WP521 ST and WP522 ST weighing modules, simple weighing applications such as platform or hopper scales can be seamlessly integrated into the S7-1500 automation system. The free “ready-for-use“ application helps to create fast and easily customer and application specific solutions. In addition, the service software SIWATOOL V7 is quick and easy to use. The integrated monitoring function of the load cells impedance as well as the process and diagnosis alarm functions optimize the plant security.
Key Features
- Seamless integration of platform and hopper scales into the SIMATIC S7-1500 automation environment
- Uniform structure and universal communication through the integration in SIMATIC S7-1500
- Integrated part of TIA portal
- Resolution of up to +/- 4 million parts
- Measurement rate of 100/120 Hz (effective interference suppression)
- Automatic impedance control of the load cells, process and diagnostic alarms
- Complete parameterization and commissioning via CPU, HMI panel or PC possible
- Direct use in hazardous zone 2
Technical Specifications
SIWAREX WP521 ST / WP522 ST | Applications | Basic scales, e.g. platform and hopper scales
| |
|---|---|---|---|
Communication interfaces (on board) | SIMATIC S7-1500 system bus Per channel 1x RS485 (Modbus RTU, remote display) Ethernet (Modbus TCP/IP,SIWATOOL) Per channel 4x digital outputs (24V DC) Per channel 3x digital inputs (24V DC) | ||
Internal resolution | Up to +/- 4 million parts
| ||
Measuring rate | 100/120 Hz | ||
Article No. | WP521 ST : 7MH4980-1AA01 WP522 ST : 7MH4980-2AA01 | ||
Design
SIWAREX WP521 ST and WP522 ST are technology modules of the SIMATIC S7-1500 Advanced Controller family and therefore communicate directly with the SIMATIC S7-1500 controller via the system bus. Additional expensive communication cards are therefore not required when using SIWAREX weighing technology.
The compact, 35 mm wide weighing modules can be mounted directly on the SIMATIC DIN rail. Assembly is therefore extremely easy and consistent with the remaining automation.
The modules are delivered ex works with a shielding set, comprising a shield clamp, shielding bracket and 24 V DC supply element with screw-type terminals. This set is assembled with an appropriate front connector (must be ordered separately, see accessories and ordering data) and therefore guarantees optimum hardware design and EMC immunity.
The power supply, load cells, RS 485 interface and the digital inputs/outputs are also connected via the removable front connector. An RJ45 port is available on the bottom of the module for the Ethernet connection (SIWATOOL and Modbus TCP/IP).
Application
SIWAREX WP521 ST and WP522 ST are the optimum solution for the integration of non-automatic scales, such as platform or hopper scales, into the SIMATIC S7-1500 automation environment. The two modules have the basic weighing functions: zeroing, taring and tare specification. Three limit values can also be freely defined and, if required, also output via the digital outputs. All further available status information can also be flexibly linked to the outputs. The digital inputs can be used for the direct wiring of pushbuttons, for example. All weighing functions (e.g. zeroing) can be freely and flexibly assigned to each input.
Typical applications: gravimetric level measurement of silos and hoppers as well as for platform scales. Beside that the weighing modules can also be used for weighing applications in hazardous locations (with Ex-interface SIWAREX IS).
The SIWAREX WP521 ST and WP522 ST Advantage
SIWAREX WP521 ST and WP522 ST offer the following key advantages:
- Uniform design technology and consistent communication in SIMATIC S7-1500
- Uniform configuration with TIA Portal
- Single (WP521 ST) and dual-channel (WP522 ST) variants are available
- Operation possible without or with failed SIMATIC CPU
- Optional direct connection of an operator panel via Ethernet port (Modbus TCP/IP)
- Optional direct connection of a remote display via RS 485 interface
- Modbus TCP/IP interface
- Modbus RTU interface
- Three digital inputs and four digital outputs
- Measurement of weight or force with a high resolution of up to ± 4 million parts and a measurement rate of 100/120 Hz
- Simple commissioning by means of HMI/CPU or PC software SIWATOOL V7 via the Ethernet interface
- Recovery point for simple restoration of all parameters
- Automatic calibration is possible without the need for calibration weights
- Module can be replaced without renewed adjustment of scale
- Automatic impedance monitoring of the connected load cells
- Direct use in hazardous area zone 2
- Up to eight 350 ohm load cells can be connected per channel
- High EMC resistance
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