VTI Instruments EX1629, Руководство пользователя

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EX1629 Web Page Operation 69
P
ASSWORD
Pages that modify instrument configuration (e.g., Network Configuration) require a password
login. This mechanism is meant to prevent accidental configuration modification. The default
password is
ex1629 . Pages that require a password will provide a link to the password login page.
NOTES 1) The instrument password uses lower-case letters.
2) This password mechanism provides only the most basic security. Applications requiring
additional security should consider using private, dedicated subnets, firewalls, etc. to limit
access to the instrument on the network.
VTI I
NSTRUMENTS
L
OGO
The VTI Instruments Logo that appears on the upper left of all EX1629 web pages is a link to the
VTI Instruments Corp. corporate website:
http://www.vtiinstruments.com .
EX1629 S
TRAIN
G
AGE
M
EASUREMENT
U
NIT
The title block (“EX1629 Strain Gage Measurement Unit” on a black background at the top of the
page) of all EX1629 Web Pages is a link to the Main Web Page.
R
ESET
This action page is used to return all of the EX1629’s acquisition configuration parameters to their
default values. It is most commonly used to return the instrument to a known configuration state
prior to the initiation of a new test sequence. Specific affected configuration parameters and their
reset values are documented in Table 6-1. An instrument reset only affects acquisition parameters
and does not affect self-calibration data. This is equivalent to the vtex1629_reset function.
NOTE An instrument reset clears the FIFO reading memory. All desired acquisition data must be
retrieved from the FIFO prior to the issuance of this command.
R
EBOOT
This action page is used to perform a complete instrument reboot, equivalent to that which occurs
when the instrument is power cycled. It is most commonly used to accept changes that are made to
the network configuration or time configuration settings. In addition, it is suggested that a reboot
be performed before conducting a firmware upgrade.
N
ETWORK
C
ONFIGURATION
The EX1629 Network Configuration page can be seen in Figure 5-3. By default, the EX1629 will
attempt to locate a DHCP server. If one is found, the IP address assigned by the DHCP server will
be assumed, along with subnet masks, gateway, etc. Otherwise, after a timeout of 20 seconds, the
unit will attempt to obtain an IP address by using AutoIP (IPv4 Dynamic Link Local Addressing).
NOTE The EX1629 can be returned to a known, default network configuration by using the LCI (LAN
Configuration Initialize) Mechanism. See
Reset Button for more information.
AutoIP is a mechanism for finding an unused IP address in the IANA assigned range 169.254.X.Y
(169.254/16) where X is in the range 1 - 254 and Y is in the range 0 - 255. The device will first
attempt to obtain the specific address 169.254.X.Y, where X and Y are the second-to-last and last
octets of the device’s MAC address. However, X will be set to 1 if it is 0 in the MAC address, and
to 254 if it is 255 in the MAC address for conformance with the AutoIP specifications. If this
address is already in use, the unit will attempt to obtain other IP addresses in the 169.254/16 range
in a pseudorandom fashion until it finds one that is available.