Yokogawa JUXTA VJXS - Manual (Page 3)

3 IM 77J01X11-01E 2nd Edition Nov 30,2005-00
Power Supply and Isolation
Power supply rated voltage:
100-240 V AC/DC 50/60 Hz or 15-30 V DC
Power supply input voltage:
100-240 V AC/DC ( − 15, + 10%) 50/60 Hz or
15-30 V DC ( ± 20%)
Power consumption:
24 V DC 2.3 W, 110 V DC 2.2 W
100 V AC 4.6 VA, 200 V AC 6.4 VA
Insulation resistance:
100 M
Ω
or more at 500 V DC between input, output-1, output-2,
power supply, and grounding terminals mutually.
Withstand voltage:
2000 V AC for 1 minute between input, (output-1, output-2), power
supply and grounding terminals mutually.
1000 V AC for 1 minute between output-1 and output-2 terminals.
4. DESCRIPTION OF FRONT PANEL
Connector for
communication
4.1 Connector for Communication
Use the connector for communication when setting the parameters us-
ing a PC (VJ77 Parameters Setting Tool) or the Handy Terminal.
< How to connect with the setting tool>
Modular jack conversion
adapter (E9786WH)
[Provided with VJ77]
JHT200
Handy Terminal
JUXTA communication cable
with 5-pin connector (F9182EE)
[Provided with VJ77 and JHT200]
Dedicated adapter (E9789HA)
[Provided with VJ77]
PC which is installed
with the VJ77
Dedicated cable (E9786WK)
[Provided with VJ77]
*: Use the VJ77 of version R1.04 or later.
5. SETTING PARAMETERS
Set the parameters using a PC (VJ77 Parameter Setting Tool) or the
Handy Terminal. Refer to “7. List of Parameters” in this manual and the
User’s Manual for VJ77 PC-based Parameters Setting Tool (IM
77J01J77-01E) or the User’s Manual for JHT200 Handy Terminal (IM
JF81-02E). Parameters are indicated inside the [ ].
■ Setting Input Range
Set the 0% value of input range in [D27: INPUT1 L_RNG] and the 100%
value of input range in [D28: INPUT1 H_RNG].
NOTE
Changing the input range resets the input adjusted value.
■ Setting Output-1 Range
Set the 0% value of output range in [D38: OUT1 L_RNG] and the 100%
value of output range in [D39: OUT1 H_RNG].
NOTE
Changing the output-1 range resets the output adjusted
value.
6. COMPUTING FUNCTIONS
6.1 VJXS-A Free Program
This computing unit is used to meet individual applications by pro-
gramming the available commands using a PC (VJ77 Parameters
Setting Tool) or the JHT200 Handy Terminal. Set the computing pro-
gram in G01 to G59.
6.2 VJXS-B Moving Average Computation
This computing unit stores the input values (X) sampled at intervals of
one-fortieth of the moving-average time (L) into 40 buffers in order,
and outputs the moving average of 40 input values (output-1 = Y1,
output-2 = Y2). The output between samplings is smoothed out by in-
terpolation. Minimum sampling time is the set computation cycle.
Therefore, when the moving-average time is set shorter, the number
of samplings is less than 40. When using a first-order lag filter for in-
put (X), set the first-order lag time constant (T).
Set the moving-average time (L) at % value in H02: CONST. The
value of 0 to 100.0% corresponds to that of 0 to 1000 seconds. For
example, enter “6” in H02 to set 60 seconds.
● Setting range of moving-average time:
0 to 320000 seconds (about 3.7 days) with 4 significant digits;
minimum unit is 1 second (however, 0.1 second for a setting of 4
seconds or shorter).
0.0 to 32000% can be set in H02.
( e.g. 12345% unacceptable, 12340% acceptable)
● Setting accuracy of moving-average time : ( ± 5.0% of set value)
± 1 second
Set the first-order lag time constant (T) at % value in H01: CONST.
The value of 0 to 100% corresponds to that of 0 to 100 seconds.
● Setting range of first-order lag time constant:
1.0 to 799.0 seconds; minimum unit is 0.1 second.
However, when not using the first-order lag function, set 0 sec-
ond.
● Setting accuracy of first-order lag time constant :
(
± 5.0% of set value) ± 1 second
X 40
X 39
X 38
X 37
X
36
X 35
X
5 X 4
X 3
X 2
X 1
Moving average=
Computation time
Time
X 1 +X 2 + • • • • • X 40
40 (Note)
Note: For the moving-average times at 3, 2 and 1
second, the number of samplings is 30, 20 and
10, respectively (when the computation cycle
is 100 ms).