Scannex ip.buffer User Manual
© UK 2007-2021 Scannex Electronics Ltd. All rights reserved worldwide.
8.2.2. Time
The ip.buffer includes SNTP client code so it can contact a remote time server and
synchronise the date and time. The server is contacted whenever the ip.buffer is booted,
and whenever the daily time update is performed
When the ip.buffer is in a remote location that has no LAN access to the Internet, the SNTP
client can dial through the modem to contact a public SNTP server – keeping the date and
time always up to date.
SNTP – Simple Network Time Protocol
Server
Address or IP address of an accessible SNTP server. Blank = no
SNTP update performed.
e.g. “time.nist.gov”
[blank]
Interface
“
LAN only
” – will connect only using Ethernet
“
Modem only
” – will always use PPP
“
LAN then Modem
” – will try to use Ethernet. If that fails it will
try PPP
“
Modem then LAN
” – will try to use PPP and if that fails it will
try Ethernet.
For the Modem dial-out setup see section 8.2.5
[LAN only]
Update At
The daily time, in 24hr “HHMM” format, when the SNTP should be
contacted. Blank = no daily update.
[0200]
Variance
The number of minutes that the “Update At” time should be
varied by for each ip.buffer serial number.
[0]
Sync Now
A write-only value that forces the ip.buffer to contact the SNTP
server immediately.
“
No
” waits until the normal update time to contact the server.
“
Sync on save
” will contact the SNTP server when you save
the form (pressing the “SAVE” button)
[No]
Last SNTP
Shows the last date and time a reply from the SNTP server was
received.
9
When using the HTTP POST features for data delivery, alert delivery, or central updates the web
server can also apply time changes back to the ip.buffer (firmware >= version 2.75)
Page 25
Scannex ip.buffer User Manual
© UK 2007-2021 Scannex Electronics Ltd. All rights reserved worldwide.
8.2.2. Time
The ip.buffer includes SNTP client code so it can contact a remote time server and
synchronise the date and time. The server is contacted whenever the ip.buffer is booted,
and whenever the daily time update is performed
When the ip.buffer is in a remote location that has no LAN access to the Internet, the SNTP
client can dial through the modem to contact a public SNTP server – keeping the date and
time always up to date.
SNTP – Simple Network Time Protocol
Server
Address or IP address of an accessible SNTP server. Blank = no
SNTP update performed.
e.g. “time.nist.gov”
[blank]
Interface
“
LAN only
” – will connect only using Ethernet
“
Modem only
” – will always use PPP
“
LAN then Modem
” – will try to use Ethernet. If that fails it will
try PPP
“
Modem then LAN
” – will try to use PPP and if that fails it will
try Ethernet.
For the Modem dial-out setup see section 8.2.5
[LAN only]
Update At
The daily time, in 24hr “HHMM” format, when the SNTP should be
contacted. Blank = no daily update.
[0200]
Variance
The number of minutes that the “Update At” time should be
varied by for each ip.buffer serial number.
[0]
Sync Now
A write-only value that forces the ip.buffer to contact the SNTP
server immediately.
“
No
” waits until the normal update time to contact the server.
“
Sync on save
” will contact the SNTP server when you save
the form (pressing the “SAVE” button)
[No]
Last SNTP
Shows the last date and time a reply from the SNTP server was
received.
9
When using the HTTP POST features for data delivery, alert delivery, or central updates the web
server can also apply time changes back to the ip.buffer (firmware >= version 2.75)
Page 25
