FDI2056 Use
r’s Manual
v 2.0 r 1.1
– 03/13
Copyright © 2013 Metrolab Technology SA
6
www.metrolab.com
When using a single-ended encoder, all signals must be connected to the active
high version of the signals (A, B, Index). When using differential signals, you must
use the various pairs provided, which are then fed to a
“differential to single ended
driver
”. The output polarity of the driver follows the polarity of the active high
signal (i.e., if A goes high and
A goes low, the output of the driver will go high).
As stated in the table, it is possible to change the voltage used to power the
encoder. A full step-by-step explanation describing this operations is available in
the “Getting Started Manual”.
2-3 COMMUNICATING WITH THE FDI 2056
The FDI 2056 communicates to any host computer using an Ethernet VXI
compliant protocol by default or using a serial PDI 5025 protocol when configured
as such.
2-4 INITIAL POWER-ON
1. After the FDI 2056 is powered on, the message
“INIT” will be displayed on all
installed channels. This indicates that the FDI 2056 is resetting. Once powered
on, the FDI 2056 takes several seconds before being able to communicate.
Please remember that you must respect a warm-up time of at least 10 minutes
before making any measurements. A significant drift might be measured if this
precaution is not taken.
2. The first operation performed by the instrument is an internal status check of
every integrator channel. During this operation, the text
“TEST” is displayed on
every tested channel. Should the instrument detect any problem, one of the
following message could be displayed on the faulty channel
: “!MEM”, “!INP”,
“!CAL”, “!COM”, “!HWU”. Actions that could be undertaken if such a situation
should arise are described in chapter 4-11-9.
3.
The “Status” indicator will then show a numerical value reflecting the current
gain setting.
Should the first channel display “A 10”, this would indicate that the
PDI 5025 emulation mode has been selected.