196
saia-pcd.com
SNTP-Server
Ethernet
Client
SNTP
RTC
Saia
PCD®
Reset SNTP
ʊRes
%XV\ʊ
(UURUʊ
6WDWXVʊ
Status SNTP
ʊ(Q 6WDW6173ʊ
/LIH%LWʊ
&6$GGUʊ
/67ʊ
(UURUʊ
6WDWXVʊ
Communication & interaction
The Simple Network Time Protocol is a standard used
to synchronise the time across several devices in IP networks.
The protocol enables the transmission of the current time
of servers in the Internet or Intranet.
Sophisticated algorithms ensure that the different run times
are balanced out across a network.
The internal system clocks (RTC) and the changeovers
between summertime and wintertime are synchronised
automatically on all network participants at the same time.
Standard
RFC-2030
Port
UDP 123
SNTP mode
Unicast Point to Point (SNTP client initiates a time request) Broadcast Point to Point (the time is sent from the
NTP server simultaneously to all clients)
Time format
UTC (Greenwich Mean Time), timezone adjustable
Timing accuracy
500 ms for Unicast Point to Point
1 s for Broadcast Point to Point (without run time correction)
Request interval
10 s
Interfaces
Ethernet or serial RS-232 via PPP
Internet
Intranet
FBoxes
The status of the SNTP function can be read and/or reset using specific FBoxes.
HTTP: Protocol for accessing the PCD-Web-Server
PG5 device configurator settings
`
Activating/deactivating the HTTP port
`
Advanced settings (buffer, sessions, keep alive timeout, etc.)
Technical data
HTTP standard
1.0 and 1.1 (RFC 2616)
2 adjustable listener ports
Standard 80 and 81
Number of sessions
8 parallel with keep alive (default setting, max. 32 adjustable)
Interfaces
Ethernet, serial RS-232 with PPP, the HTTP protocol can also be encapsulated in the S-Bus and therefore
used via other interfaces such as USB. For details please refer to chapter B3 S-Web technology
Hypertext Transfer Protocol (HTTP) is a protocol used for
transferring data across a network. With Saia PCD®s, the protocol
is used for accessing the PCD-Web-Server.
SNTP: Simple Network Time Protocol
Websites
PCD data
Ethernet
IP protocols
PPP
HTTP
RS-232
Internet
Intranet
Telecom
