Cambium Networks cnReach N500 Handleiding (253 Pagina's)

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cnReach N500 User Guide System Configuration

phn-4980_001v004 August 2019)

2-66

Global Settings:

There is a global set of error registers, just like the Device and Poll, which indicate if any device or poll

failed(1), or all have succeeded(0).

The data concentrator output port, Modbus slave, defaults to 504. Make sure it does not conflict with

other ports defined on the system.

MQTT can be enabled or disabled, and its particular settings are configured here. A MQTT broker IP an

port (default 1883) is specified, along with username and password, and the MQTT group name.

Global Settings is configured under the Manage Sub-menu.

MQTT

MQTT is included in the Data Concentrator package and it built on top of Data Concentrator.

MQTT uses the Sparkplug B specification, so the Group ID is typically a larger grouping, a facility, an area

in a facility, a geographic area, etc. The Node Name is taken from the Device Name (also the host name)

and appended with “_DataConcentrator”. Device name, Poll name, and Value name form the rest of the

tag to define each value.

Values are reported to MQTT on a change of more than 1% of its prior value.

If a Modbus input value is not modified, the MQTT format is derived from the input format. If a slope,=

offset, or special modification is made to the value, then the MQTT double format is used.

No Modbus output map/values need to be defined for MQTT to work. MQTT uses only the input side,

Devices, Polls, and Values to determine both the namespace and the data type. Both Modbus output

and MQTT may be used simultaneously, or either by itself.

Bit METRIC_DATA_TYPE_BOOLEAN

UInt16 METRIC_DATA_TYPE_UINT16

Int16 METRIC_DATA_TYPE_INT16

UInt32xxxx METRIC_DATA_TYPE_UINT32

Int32xxxx METRIC_DATA_TYPE_INT32

Float32xxxx METRIC_DATA_TYPE_FLOAT

All manipulated values (slope/offset/special) are MQTT

Double (Double) METRIC_DATA_TYPE_DOUBLE

An example MQTT/Sparkplug B namespace, using the Device and Poll setup examples earlier, looks like:

/spBv1.0 /<Group Name> /DDATA /<Device Name>_DataConcentrator /D1 /P1 /C4

/C5

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