Recommendations - Honeywell SLG 700 Option Manual

Recommendations

For Communication board download. If a firmware upgrade is required for a large number of SLG 700
devices, follow these guidelines:
1. Diagnostics must be backed-up before initiating the firmware update. The
communication board diagnostics are initialized to zero if backup is not performed before
initiating the firmware update. The backup diagnostics method is available in the
Diagnostics transducer block.
2. Only one device firmware download is allowed in a given H1 Link:
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.
3. 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.
4. 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.
5. 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.
6. 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 SLG 700 provides the following:

Max current draw (observed during firmware download): 28mA

Normal quiescent current: 18 mA

Inrush when powered on: 28 mA
Page 118 FOUNDATION Fieldbus Option User's Guide Rev. 3.0