Heisei Electronics DXD Series, Руководство по эксплуатации и обслуживанию, Страница: 25 / 74

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DXD FIRMWARE CHANGE SUMMARY
The major firmware enhancements from Firmware Version
2.15 to Version 3.23 firmware for the DXD are listed below for
reference. Page references pertain to the detailed operational
specifications for the DXD.
1. Alternate Engineering Units (AEU) were added to the com-
mand set. The DXD will respond in PSI or 10 other units of
measure. (Page 34-36, 38 & 42).
2. Error status response character (ASCII sub code “ack” /
“nak” or ASCII literal “A” / “N”) is now appended to each
response of the DXD. The error status response type is
selected via the mode byte at location 001 in the EEProm.
The appended character can also be switched off using
a bit in the mode byte. This places the unit in “Legacy”
mode. (Page 38).
3. Error Flag status Byte command has been added to the
Command Library. “#**EF” will send back an error byte. If a
“nak” or “N” is appended to a response the error byte will
inform the user what the error source was.
4. The lock byte in EEProm (location 127) now locks the
entire EEProm (except location 127) from access with the
“#**ew” command (page 29). To write with the “ew” com-
mand, location 127 must be set to “093”.
5. A “rolling average” filter has been added . It is accessed
through the commands “FA” or “FB”, & “fa” or “fb”. FA is
filter amount, and FB is filter band. The limits of FA are 1,
2, 4, 8, or 16 readings to be averaged. FB limits are .002%
to 9.999% of 50,000 counts, and sets the band of counts
change tolerance to the averaging routine. If a change
outside of the FB limits is seen, the averaging registers are
reset and the new pressure reading is displayed immedi-
ately. The amount of counts selected for FB can be seen at
locations 158 & 159 in EEProm. (Pages 29, 30, & 40, 41).
6. The addressed DXD must now recognize it’s address prior
to doing an A/D update, and only the “PS”, “RC”, “ST” and
“AEU” commands will generate an update. This speeds up
the response time of the DXD to commands not requiring
pressure update information.
7. UZ, “User Zero” read function
For sensors such as 6000 and 7500 psi, which originally
did not have a decimal point in their response string, one is
now included; example
UZ=+000001.ackcrlf 15 characters (ack/nak mode)
UZ=+000001.Acrlf 14 characters (A/N mode)
UZ=+000001.crlf 13 characters (Legacy mode)
7a. uz “user zero” write function
For sensors such as 6000 and 7500 psi, which originally
did not have a decimal point in their response string, one
now must be included; example, #**uz+000002.
8. UT “User Tare” read function
For sensors such as 6000 and 7500 psi, which originally
did not have a decimal point in their response string, one is
now included; example,
UT=+000001.ackcrlf 14 characters (ack/nak mode)
UT=+000001.Acrlf 14 characters (A/N mode)
UT=+000001.crlf 13 characters (Legacy mode)
8a. ut “user tare” write function
For sensors such as 6000 and 7500 psi, which originally
did not have a decimal point in their response string, one
now must be included; example #**ut+000002.