Data Sheets and Manuals
Q:What is Hobart Ground Power Modbus and BACnet and HTML Gateway?
A:The HOBART Ground Power Serial Driver allows the Gateway to poll Hobart devices for status, real time and configuration data. Thus the driver can be used to read current, voltage, phase, power and other variables from the Hobart device.
The Hobart Ground Power (HGP) Gateway serves data from a HGP controller as Modbus, BACnet or Web data. The gateway supports all these options simultaneously. Use the data you want and ignore the other….Read More
Q:How Hobart Ground Power (HGP) Gateway serves data?
A:The Hobart Ground Power (HGP) Gateway serves data from a HGP controller as Modbus,
BACnet or Web data. The gateway supports all these options simultaneously. Use the data you
want and ignore the other.
The Gateway connects to the HGP controller, reads data and stores it internally. When a
remote system requests data, this data is served in a form that is appropriate to the protocol.
In the event that the connection to the HGP controller is lost, or data cannot be read, the
gateway can signal this to the remote data client.
The gateway requires minimal configuration and can be considered a plug and play component
of a system, in that it is ready to operate out of the box with the default configuration.
Q:How to interpret Modbus Data?
A:Modbus does not have a mechanism for reporting the validity of data. What
happens if the gateway loses its connection to the Hobart controller ? After a
timeout period has elapsed the gateway will regard the data it had read previously,
The remote data client will see the value 65535 (-1) in the registers that contain
unreliable data. In other words, rather than serve the old (possibly obsolete ) data,
the gateway serves a value that clearly identifies that the data is invalid.
Modbus does not support floating point numbers so all values are served as whole
Q:How to read and interpret BACnet Data?
A:BACnet supports discovery. When you discover the gateway, objects and properties you
will find appropriately named objects that report data from the Hobart Controller.
Because BACnet supports discovery, usually knowledge of the BACnet Device Instance
Number does not need to be known in advance.
Each BACnet device (like the gateway) needs to have a unique instance number.
Therefore it may be necessary for you to change the instance number.
If the gateway loses communications with the Hobart controller or if a data point cannot
be read from the controller, the ‘Out of Service’ property of the data object is set true
once the timeout has expired. The value of the ‘Present Value’ property is not changed,
thus the last good value will be shown…Read More
Q:What is most common BACnet problem?
A:If the device or application that is reading the BACnet data is on another subnet then it
will not discover or be able to talk to the gateway. This can be resolved two ways. 1.
Change the IP address of the gateway to be on the same subnet – a simple task. 2.
Install BBMD – a non trivial task – but a task you can often pass the buck on – it is the
responsibility of the company installing the BAS system to provide BBMD…Read More