SmartSwarm 300 Series
:
48
Response Timeout
Specifies the maximum time interval, in seconds, in which a response to a command is
expected from a connected slave device. If the interval is set too short, valid replies may
be missed. If set too long, retries sent by the Master may be interpreted as a reply and
cause valid exchanges to be missed. This will typically be set to a slightly lower value than
the Modbus master timeout. (E.g. 1.5 seconds.)
Table 13. Modbus Interface
8. CONFIGURE THE MQTT INTERFACE
MQTT is an OASIS and IEC/ISO standard.
The configuration interface provided enables you to configure the MQTT Client that resides on the SmartSwarm
351. The MQTT Client will use this configuration to connect to, and to communicate with, an MQTT Broker. Once
connected, the SmartSwarm 351 will publish data to the MQTT Broker.
The data published will be in accordance with the Rules and Topics that you will define for your Modbus
environment: see chapters 9 and 10.
The MQTT Broker is a 3rd party service: Advantech B+B SmartWorx does not provide this service.
Any MQTT 3.1.1 compliant broker may be used.
For information on deploying MQTT in a secure manner we recommend that you refer to “MQTT and
the NIST Cybersecurity Framework” which is available on the OASIS website (http://docs.oasis-
open.org/mqtt/mqtt-nist-cybersecurity).