Issue:
How to disable the Auto-Speed sensing option and set Modbus communication network parameters with the EcoStruxure Power Commission (EPC) software.

Product Line:
Circuit Breakers

Environment:
Breaker Digital Systems IFM

Resolution:

General Description
Two configurations of the IFM interface are available:

• Automatic configuration (Auto-Speed sensing ON, factory setting): when connected to the Modbus network, the IFM interface automatically detects the network parameters.
• Personalized configuration (Auto-Speed sensing OFF): the network parameters can be personalized using the EPC software. See embedded video (the purpose of the video is to show where to find the IFM configureation screen inside of EPC).

Automatic Configuration
The Modbus slave address is defined by the two address rotary switches on the front panel of the IFM interface. When connected to the Modbus serial line network, the IFM interface automatically detects the network speed and parity. The Auto-Speed sensing algorithm tests the available Baud rates and parities and automatically detects the Modbus communication network parameters. The Modbus master must send at least 25 frames on the Modbus network in order to allow the Auto-Speed sensing algorithm to work. The transmission format is binary with one start bit, eight data bits, one stop bit in case of even or odd parity, and two stop bits in case of no parity.

If the Auto-Speed sensing algorithm does not detect the network parameters, it is recommended to follow this procedure:

1. Set up the IFM interface to Modbus address 1.
2. Send a read multiple register request (function code 0x03) to slave 1, at any address and for any number of registers.
3. Send this request at least 25 times.

NOTE: If the network speed or parity is changed after the IFM interface has automatically detected these settings, the IFM interface must be restarted (power off/power on) in order to detect the new network parameters.


Personalized Configuration
The Modbus slave address is defined by the two address rotary switches on the front panel of the IFM interface.
Disable the Auto-Speed sensing option and set the following Modbus communication network parameters with the EcoStruxure Power Commission (EPC) software (See embedded video, the purpose of the video is to show where to find the IFM configureation screen inside of EPC):

• Baud rate: 4800, 9600, 19200 and 38400 Baud.
• Parity: even, odd, and none (it is possible to select one stop bit or two stop bits in case of no parity).

NOTE: It is not possible to change the Modbus address or the status of the locking pad with the EPC software.

The following video demonstrates the disabling the Auto-Speed sensing option and configure the Modbus network parameters on the Modbus Interface Module (IFM, STRV00210) via Ecoreach software (the purpose of the video is to show where to find the IFM configureation screen inside of EPC)  The default password shown in the video is 0000:

Released for:Schneider Electric Canada