VTI Instruments EX1401, Руководство пользователя

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42 EX1401 Basic Operation
color. If the LED is blinking/flashing green, it indicates that the Device Identification command was
received over the LAN. The status indicator shall continue to flash green until commanded to do
otherwise. Refer Blink LAN Indicator section under web page operation section for more details.
IEEE 1588 LED
The IEEE 1588 Clock Status Indicator is designed to show both the status and the type of clock in
the EX1401 device. This indicator is a single, bi-color LED (Red/Green) whose states are identified
as follows:
State of LED PTP Clock/Sync State
LED Color (s) Single (Green)
Off Not Slave, Not Master, and Not Faulty
On – Solid Green Slave
On – Blinking Green once every second Master but not Grandmaster
On – Blinking Green once every two seconds Master and also Grandmaster
On – Solid Red Faulty
T
ABLE
3-4: IEEE 1588 LED S
TATES
LEDs on Network Port
There are two LEDs present on the RJ45 Ethernet connector, placed on the rear side of EX1401.
The right-yellow LED indicates network activity. The blink rate is roughly proportional to amount
of network traffic. The left-bicolor (green/amber) LED indicates connectivity and rate. Green
indicates connected at 100Mbs and amber indicates connected at 10Mbs. If both LEDs are off, it
indicates that network is not connected. Network connectivity does not mean the device has obtained
an IP address or has access to the connected network. The LAN indicator on the front provides that
function.
Channel LED Indicators
In addition to the system status indicators, the EX1401 also features a red LED for each channel on
its front panel, mounted next to the mini-TC connector. The behavior of this LED can be controlled
by setting the
Channel.Overload.Indicator property. This is a mask with the same bit values as the
Overload Status described above. Whenever Channel.Overload.Status &
Channel.Overload.Indicator != 0 , the LED be will be lit. Otherwise, the LED will be off. By default,
only the OTD bit is set in the Indicator mask, so the LED will indicate open transducer status until
configured otherwise.
O
VERLOAD AND
T
RIGGER
O
UTPUTS
The EX1401 features three methods of trigger output: an 8-channel DIO port, an External trigger
SMB, and 8 LAN Events. Any of these can be tied to the Overload status of one or more channels.
First set the
Channel.Overload.EventEnabled mask, which has the same bit definitions as the
Channel.Overload.Status described above. Whenever Channel.Overload.EventEnabled &
Channel.Overload.Status != 0 , any associated trigger outputs will be driven high. Otherwise, they
will be driven low.
To associate trigger outputs with channel overloads, the Events interface is used. Set the Source
property of the desired trigger output’s Event interface to
Overload_CH<N> , where <N> can be
either a single channel number or a range of channels. For instance, setting
Events.Item[“DIO3”].Source = “Overload_CH1,8,12-16”
will cause DIO3 to be driven high
whenever any of channels 1, 8, 12, 13, 14, 15, or 16 have any overload condition.
D
IGITAL
I/O
The EX1401 features an 8-channel digital I/O port on the rear panel of the instrument. This port can
be used for various functions, such as arm/trigger source, for presentation of limit evaluation