SATEC ETC2002 - Manual (Page 19)

Chapter 3 Operating the ETC2002 Using the ETC2002
ETC2002 Network Communicator 19
Monitoring Digital Inputs
The Data server provides continuous monitoring events asserted by the
ET2002 digital inputs and gives notification to the eXpertPower server.
Whenever the Data server detects a change in the status of the ETC2002
digital inputs, it records an event record to the Event log file. If the
eXpertPower service is enabled in the ETC2002, this event initiates a
connection to the eXpertPower server.
eXpertPower
TM
Client
The ETC2002 has an embedded eXpertPower TM client that provides
communications with the eXpertPower TM server – the SATEC proprietary
Internet services.
Connections to the eXpertPower TM server are normally handled on a periodic
basis, but can also be initiated via the ETC2002 event exchanges and the
ETC2002 digital inputs DI1-DI4 to give an alert for specific events.
See Configuring eXpertPower Client in Chapter 5 for more information on
configuring the eXpertPower client in your ETC2002.
ETC2002 Clock
GPS Clock Synchronization
The ETC2002 has the IRIG-B input port for receiving the IRIG-B time code
signal from an external GPS satellite clock. The ETC2002 IRIG-B port uses
unmodulated pulse-width coded time code signal (unbalanced 5V level).
To use the IRIG-B input:
1. Connect the GPS master clock to the IRIG-B BNC connector on
the front of the ETC2002
2. Define your time zone offset in the Local Settings setup. See
Configuring Local Time Settings in Chapter 5 for information on
configuring time options in your device.
When the IRIG-B signal is present on the device input, the ETC2002
automatically synchronizes its clock with the GPS time each second,
normally with accuracy better than 1 millisecond if the time is synchronized
with the GPS satellite time. If the GPS clock loses the satellite signal, the
clock continues to generate the IRIG-B time code referenced to the last
available satellite time, but the time quality may deteriorate. Such signal
losses can last from a few minutes to several hours. During such outages,
the time code generated by the GPS receiver is typically accurate to within a
few milliseconds over a 24-hour period.
If the IRIG-B signal is not present on the device input, the ETC2002
automatically uses its internal RTC clock.
Daylight Savings Time
The ETC2002 clock can automatically switch the clock from standard time to
daylight savings time (DTS) at preset time switch dates. The default
factory-set time change points are set for the U.S.A.
When the daylight savings time is enabled, the ETC2002 automatically
adjusts the device clock at 02.00 AM when daylight savings time
begins/ends.
If the daylight savings time option is disabled, you must manually adjust the
device clock for daylight savings time. The daylight savings time option is
disabled in the ETC2002 by default.
See Configuring Local Time Settings in Chapter 5 for information on
configuring local time options in your device.