SIWAREX WP241 weighing module can easily be integrated into SIMATIC S7-1200 via the TIA Portal but can also be operated without a SIMATIC CPU. It has been designed for monitoring belt scale and weigh belt applications.
The flexible weighing module for belt scales.
The SIWAREX WP241 compact module is easy to install in the SIMATIC S7‑1200 automation system. It can also be operated as a stand-alone module, i.e. without a SIMATIC CPU.
SIWAREX WP241 can be connected directly to a Modbus HMI (Human-Machine Interface) panel through Ethernet connections or an RS485 RTU Interface. The standard functions for belt scale control, such as flow rate, belt speed and belt loading can be adapted and extended as required. The simulation mode allows users to test functions like belt speed, belt loading, flow rate and many others, without a moving conveyor belt. For commissioning and operation, the TIA Portal project “ready for use” for operator panels is available. In addition, SIWAREX WP241 can be used in hazardous areas zone 2/22.
Key Features
- Uniform structure and universal communication through the integration in S7-1200
- Standalone operation mode without SIMATIC CPU possible
- Modbus TCP/IP & Modbus RTU
- 6 totalizers (individual resettable)
- Pulse signal for remote totalizer
- Simulation mode for belt load and/or belt speed
- Trace recorder
- Recovery point for easy rebuild of all parameters
- Automatic zero tracking function
- Easy commissioning via SIWATOOL and PC or via HMI touch panel
- Extensive diagnostic functions
- Flexible adaption to different requirements
- Various calibration options
- Can be used in hazardous applications ATEX zone 2
Technical Specifications
SIWAREX WP241 | Integration in automation systems | SIMATIC S7-1200 Other systems via Modbus RTU or ModbusTCP/IP | |
|---|---|---|---|
Communication interfaces | Ethernet (Modbus TCP/IP, SIWATOOL) RS 485 (Modbus RTU) | ||
Internal resolution | Up to 4 million parts
| ||
Internal/external updating rate | 10ms/100Hz
| ||
In-/Outputs
| 3 programmable digital inputs 4 programmable digital outputs 1 programmable analog output (0/4-20mA) Speed sensor input | ||
Design
SIWAREX WP241 is a compact technology module in the SIMATIC S7-1200, and it allows direct connection to S7-1200 components via a sliding connector. The rail mounting of the 70 mm (2.76 inch) wide weighing module means that it is extremely easy to mount/wire.
The power supply, load cells, RS 485 interface, digital input/outputs and the analog output are connected via the screw plug of the weighing module. An RJ45 plug is used for the Ethernet connection.
Application
SIWAREX WP241 is the optimal solution wherever belt scales are used that demand high accuracy, high user-friendliness, and flexible system integration. The typical applications of the SIWAREX WP241 are determining the current material flow rate, belt load, and belt speed. Furthermore, 6 totalizers are available for evaluating the amount of material conveyed.
The SIWAREX WP241 Advantage
SIWAREX WP241 offers the following key advantages:
- Uniform design technology and consistent communication in SIMATIC S7‑1200
- Uniform configuration with TIA Portal
- Operation without SIMATIC CPU possible
- Direct connection of an operator panel via Ethernet
- Four digital inputs and outputs, one analog output
- Measurement of weight with a high resolution of ± 4 million parts
- Simple adjustment of belt scales using the SIWATOOL V7 program via the Ethernet interface – even without knowledge of SIMATIC
- Replacement of module possible without renewed calibration of the scale
- Use in hazardous area zone 2
- Different calibration methods: With test weights, test chain, automatically or via material batch.
- Specification of belt inclination angle
- 6 totalization memories
- Simulation of speed and belt load for test purposes
- Comprehensive diagnostics functions
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