Recommendations; Downloading The File - Honeywell ST700 User Manual

Foundation fieldbus pressure transmitter
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Recommendations

If firmware upgrade is required for a large number of ST 700 devices, the following are the
guidelines,
1. Only one device firmware download is allowed in a given H1 Link process:
Firmware download to multiple devices must happen one after another in the same
link. However, parallel downloads can be performed to devices on different H1 links.
2. Download firmware to one device type at a time in a H1 link:
This reduces the chance for unknown interactions between devices to cause link issues
or download failures.
3. Reduce usage of DTM through tools like FDM in the H1 link:
This reduces the traffic on the link and therefore reduces the time required for the
download to complete.
4. Parallel Firmware downloads from single Control Builder
Firmware downloads to a single FIM should be done from single Control Builder
instance. This reduces the chance of initiating multiple downloads to the same H1 link
from different users.
5. FF segment design (the choice of devices to connect to a FF segment) must consider
the maximum current draw of those devices, as well as the potential for inrush current
during power-up.
For reference, the ST 700 provides the following:
Max current draw (observed during firmware download): 28 mA
Normal quiescent current: 18 mA
Inrush when powered on: 28 mA

Downloading the File

The firmware file to be downloaded is called as Gendomain file and have the file extension
.ffd.
File Name
The file name is constructed as follows:
"Manufacturer ID" + "_" + "Device Type" + "_" + "Domain Name" " + "_" +"Software
Name" + "_" +"Software Revision" + "." + "ffd", where:
Page 92
FOUNDATION Fieldbus ST 700 Pressure Transmitter User's Guide
Revision 2.0

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