Yokogawa EJX930A - Manual (Page 139)

A7-2
IM 01C25T02-01E
A7.4 Software Download
Sequence
The flowchart below outlines the software download
procedure. Although the time taken for the entire
procedure varies depending on the size of the field
bus device’s software, it generally take about 20
minutes where there is a one-to-one connection
between a fieldbus device and download tool, and
longer when multiple field devices are connected to
the fieldbus.
FA0702.ai
Start download tool
Select file(s)
Select device(s)
Carry out download
Activate device(s)
Select the software file(s) you
want to download.
Select the device(s) to which you
want to download software.
Transmit the software to the field
device(s).
Activate the device(s) to start with
new software.
Figure A7.2 Flow of Software Download Procedure
CAUTION
Carrying out a software download leaves the
PD tag, node address, and transducer block
calibration parameters that are retained in the
nonvolatile memory inside the target device,
but may reset other parameters to the defaults
(except a minor update that does not change
the number of parameters). Hence, where
necessary, save the parameters using an
engineering tool, parameter setting utility, or the
like before carrying out a software download,
and then reconfigure the field device(s) after the
download. For details, see Section A7.6.
CAUTION
The current dissipation of the target field
device increases transitorily immediately after
a download due to erasing of the FlashROM’s
contents. Use a fieldbus power supply which
has sufficient capacity to cover such increases in
feed current.
CAUTION
Upon completion of the activation, the target
fieldbus device performs resetting internally,
which temporarily halts fieldbus communication
and function block executions. Be especially
careful about a valve positioner; the output air
pressure will fall to the minimum level (i.e., zero).
CAUTION
Do not turn off the power to a field device or
disconnect the download tool during a download
or activation. The device may fail as a result.
NOTE
Be careful about the noise on the fieldbus link. If
the fieldbus is noisy, the downloading may take a
very long time or fail.
A7.5 Download Files
Download files have the following filenames (with
the filename extension of “.ffd”). Take care to
choose the correct download file for the target field
device:
“594543” + device family + “_” + device type +
“_” + domain name + “_” + software name + “_”
+ software revision + “.ffd”
For example, the name of the download file for an
EJX may have the following name:
594543000C_000C_EJX_ORIGINAL_R101.ffd
Refer to A7.11(3) DOMAIN_HEADER about each
keyword of the file name.
The device type is “000C” for an EJX transmitter,
and is "0011" for an EJA transmitter.
The software name is “ORIGINAL” or “UPDATE.”
The former indicates an original file and the latter
an update file. Whenever performing a download
to update the device revision, obtain the original file.
In general, an addition to the parameters or blocks
requires a device revision update.