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MBus

The Meter-Bus protocol is designed for querying data from meters and enables communication via two-wire conductors, Ethernet, or wireless connections.

Note: To use the M-Bus, a level converter is required, as it not only performs signal conversion but also supplies power to connected devices on the M-Bus. Level converters are connected either via a serial interface (RS232) or Ethernet.

Connection Parameters

M-Bus (Serial)
Port Selection of the serial interface
Stop bits Number of stop bits (refer to the device configuration or device documentation)
Parity Parity bit (refer to the device configuration or device documentation)
Baud rate Speed (refer to the device configuration or device documentation)
M-Bus over TCP
Hostname Hostname or IP address
Port TCP port
General
Addressing Choose whether to use the primary addresses configured on the device (Primary) or to search for device-specific secondary addresses (Secondary)
Timeout (ms) Maximum waiting time for responses
Interval (sec) Optional specification of a query interval in seconds (e.g., for battery-powered devices)

Primary Addressing

With primary addressing, each device is assigned a unique primary address between 1 and 254. During the scan, all addresses between the configured min address and the configured max address are queried.

Advantages
Disadvantages

Secondary Addressing

With secondary addressing, each device is identified by a unique serial number, typically consisting of 8 to 12 digits. During the scan, many address combinations are tried to identify all devices.

Advantages
Disadvantages

Continuous Scanning

Newly connected devices are recognized even after the initial scan. An unused address combination is checked after each read cycle. Over time, the possible address range is re-scanned, and newly found devices appear in AnyViz.