Configuration Manual Owner manual

Publication 1757-PM002A-EN-E - June 2006
2-26 Set Up A System
required to configure the H1 network, and the ability for the network to
perform necessary housekeeping.
Scheduling
Scheduling is done automatically.
The linking device is the LAS when active and running, but each H1 should
have at least one Link Master capable device within its network so it can
become the backup Link Master/LAS if the linking device is reset or fails to
keep the H1 network running.
Getting Devices in the Live List
After the device is connected to an active H1 network, the status of the device
in the H1 Live List should be monitored. Instructions for viewing the LiveList
can be found in the RSFieldbus User Manual. In addition, the manual explains
what to do if the device does not show up in the Live List correctly. For
additional troubleshooting tips involving the Live List, see page
5-5.
Device Tags
(1)
Device tags are names that you assign to devices. A device tag is assigned to
the device when it is commissioned and (for most device states) retains the tag
in its memory when it is disconnected. The network address is the current
address that the fieldbus is using for the device.
The Fieldbus Foundation uses node addresses in the range 0-255. Each vendor
allocates the node numbers in a way that is somewhat unique. They all have
reserved low numbers for overhead and host interfaces, and a group above
that for live field devices, and some higher numbers for spares.
Addresses used by FF are in accordance with the following ranges:
• 0-15 are reserved.
• 16-247 are available for permanent devices. Some host systems may
further subdivide this range. This range is typically shortened for
efficiency.
IMPORTANT
Intrinsic safety barriers cause the maximum device number
per H1 to change to 4 to 6 devices, depending on the
power consumption of the devices installed and the
manufacturers’ specifications for both the barrier and the
transmitter.
(1)
FF Engineering Guide (8.2.1)