B&B Electronics VFG3000 - Manual - Manual (Page 57)

A DVANCED C OMMUNICATIONS U SING T IME M ANAGEMENT
R EVISION 1 P AGE 41
The properties are detailed below…
• The Enable Time Manager property is used to control access to the other
facilities. If it is not checked, Fieldbus Gateway Manager will operate in local
time and will have no knowledge of time-zones or other time management
information.
T IME S ERVER
Fieldbus Gateway Manager can act as an SNTP server by selecting yes in the Time Server
Enable SNTP drop down selection box. This will allow other B&B Electronics products to
synchronize their own clocks to the clock of this unit. The IP address of the server when
programming the client is the Ethernet port IP address programmed in Fieldbus Gateway
Manager. Note that Fieldbus Gateway Manager’s implementation of SNTP is not fully RFC
compliant, and is not supported as a source of synchronization for non-B&B Electronics
clients.
T IME C LIENT
Fieldbus Gateway Manager can act as an SNTP client by selecting yes in the Time Client
Enable SNTP drop down selection box. The Gateway will then attempt to synchronize its
clock with another B&B Electronics product, or to another SNTP time source such as a server
on the network. For example, Windows XP Pro is an SNTP server.
• The Linked DST property is used to instruct the SNTP client to attempt to read
the current Daylight Savings Time setting from the SNTP server. As this facility
is not a standard part of the SNTP protocol, it will only operate if another Master
or Gateway Fieldbus Gateway is specified as the server. The facility is useful, in
that it allows the Daylight Savings Time adjustment to be made via a single
device on the factory network, with the other devices then following the central
setting.
• The SNTP Mode and SNTP Server properties are used to configure the IP
address of the Simple Network Time Service server. If Configured via DHCP is