Read M-Bus meters from external M-Bus master

Read M-Bus meters from external M-Bus master

The following list instructs how to configure a PiiGAB M-Bus 900/900S as an M-Bus slave, i.e. one or two external M-Bus masters can read the M-Bus meter connected to the gateway.

Notice: On PiiGAB M-Bus 900 there can only be one external M-Bus master connected.

1. Start the gateway’s web interface in any web browser.
2. Go to the Configuration page.
3. Select any slave port to configure as an M-Bus slave.
4. Specify the following parameters:
   • Type: Serial.
   • Com port: M-Bus Slave 1 or M-Bus Slave 2.
   • Baud rate: The specified communication speed on the M-Bus loop.
   • Bit Number: Number of data bits on the M-Bus loop. Standard 8 bits.
   • Parity: The parity for the M-Bus loop. Standard Even parity.
   • Stop Bit: Number of stop bits on the M-Bus loop. Standard 1 stop bits.
   • Timeout: Expected time to get answer from the M-Bus meter.
   • Protocol: The data protocol on the M-Bus loop. Standard M-Bus.
5. Press the Save settings.
6. Connect the external M-Bus loop from the external M-Bus master to the following pins:
   • PiiGAB M-Bus 900: Pins 15-18. Notice only one M-Bus slave.
   • PiiGAB M-Bus 900S: Pins 15-16 (M-Bus slave 1) or pins 17-18 (M-Bus slave 2).

The picture shows Slave port 2 is configured for M-Bus slave 1 on 2400 baud, 8 data bits, even parity, 1 stop bit, 2000ms as timeout and M-Bus communication. M-Bus Slave 1 på 2400 baud, 8 databitar, jämn paritet, 1 stoppbit, 2000ms som timeout och M-Bus kommunikation.

Note:

• Make sure the gateway doesn’t use the specific M-Bus slave port anywhere else. For instance any other slave ports or the Modbus2MBus and/or the Wireless applications.