# 28 M-Bus ### Overview M-Bus or Meter-Bus is a protocol for the remote reading of water, gas, or electricity meters. M-Bus is also usable for other types of consumption meters, such as heating systems or water meters. The M-Bus interface is made for communication on two wires, making it cost-effective. M-bus over TCP is also supported. When configured, meters will deliver the data they have collected to a WCCLite RTU that is connected at periodic intervals (scan\_rate\_ms) to read all utility meters. ### Configuration ##### M-Bus parameters for *Device* tab

Parameter	Type	Description	**Required	Default value (when not specified)	Range
Parameter	Type	Description	**Required	Default value (when not specified)	Min	Max
name	string	User-friendly device name	Yes
description	string	Description of a device	No
device\_alias	string	Alphanumeric string to identify a device	Yes
enable	boolean	Enabling/disabling a device	No	1	0	1
protocol	string	Protocol to be used.	Yes		mbus serial, mbus tcp
scan\_rate\_ms	integer	All reads and writes will be executed within the timeframe in milliseconds.	No	10000
poll\_delay\_ms	integer	Minimum time delay in milliseconds to wait before sending any data on port.	No	200
timeout\_ms	integer	Timeout of waiting for an incoming response in milliseconds	Yes		0	60000
address	integer	Device address	Yes
device	string	Communication port	Yes (for serial)		PORT1	PORT2
baudrate	integer	Communication speed, baud/s	No (for serial)	9600	300, 600, 1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200
databits	integer	Data bit count for communication	No (for serial )	8	6	9
stopbits	integer	Stop bit count for communication	No (for serial)	1	1	2
parity	string	Communication parity option	No (for serial)	none	none, even, odd
serial_close_delay	integer	Delay before closing the serial connection.	No (for serial)	400
ip	string	The IP address of the TCP slave device	Yes (for TCP).
port	integer	TCP communication port	Yes (for TCP)		0	65535

##### M-Bus parameters for the *Signals* tab

Parameter	Type	Description	**Required	Default value (when not specified)	Range
Parameter	Type	Description	**Required	Default value (when not specified)	Min	Max
signal\_name	string	User-friendly signal name	Yes
device\_alias	string	Device alias from a Devices tab	Yes
signal\_alias	string	Unique alphanumeric name of the signal to be used	Yes
enable	boolean	Enabling/disabling of an individual signal	No	1	0	1
log	integer	Enable logging in the event log	No	0
number\_type	string	Type of a number (FLOAT, DOUBLE, DIGITAL, etc.)	Yes
job\_todo	string	Tag job as single or multiple comma-separated OBIS codes	Yes
tag\_job\_todo	string	Tag sub job	Yes