SIEMENS 7MH4900-2AA01 Control Module

FAQ

1. How do I calibrate the SIWAREX FTA using SIWATOOL FTA?

• Brief procedure:

1. Connect the PC to the SIWAREX FTA module via the RS232 interface and launch the SIWATOOL FTA software. 

2. Enable Service Mode (Service Mode = 1). 

3. Configure the parameters in Data Record 3 (DR3), including weighing units, resolution range, and calibration weight. 

4. Execute the "Set zero valid" (set to 3) and "Adjustment weight 1 valid" (set to 4) commands in sequence. 

5. Disable Service Mode (Service Mode = 2) to complete the calibration.

• For a detailed calibration workflow, please refer to the SIWAREX FTA calibration guide (PDF).

2. Is it possible to upload a program file from an MMC (Micro Memory Card) and download it to a new module using SIWATOOL V4 or SIWATOOL FTA software?

• Answer: No. It is not possible to directly extract configuration files from an MMC and download them to a replacement module using SIWATOOL software. When a module is replaced, parameters must be reconfigured and the unit must be recalibrated.

3. What software is required to integrate a SIWAREX weighing module into SIMATIC PCS7?

• Answer:

• The corresponding version of the HSP (Hardware Support Package) must be installed. 

• AS function blocks: SFT_AWI (FB461) for scale control, CMD_AWI (FB647) for commands, and MOD_SIWA (FB648) for diagnostics and maintenance. 

• OS panels: These provide a standard view, a dosing view, and a service view.

4. What are the primary interfaces and I/O configurations of the module?

• I/O configuration: 7 digital inputs (DI), 1 control input (CI), 8 digital outputs (DQ), and 1 analog output (AQ). • Communication and weighing interfaces: 1x RS485, 1x RS232, and 1x load cell (LC) interface (supporting 1–4 mV/V).

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