![background image](http://html1.mh-extra.com/html/yokogawa/vjx7/vjx7_user-manual_3502893005.webp)
However, if the setting is made so that the upper limit < lower
limit, the unit outputs the upper limit value.
6.8 VJX7-H (Velocity Computation)
This computing unit calculates the input velocity by subtracting
the input of the last velocity computation (XL) from the present
input (X). The unit then adds a 50% bias to one-half of the
obtained velocity and outputs the result (output-1=Y1, output-
2=Y2). The output results is 50% when the input is not changed,
50% or more when the input increases (100% for X-XL 100%),
and 50% or less when the input decreases (0% for X-XL –100%).
When using a first-order lag filter for input (X), set the first-order
lag time constant (T).
Y1=Y2=
+50%
X–X
L
2
Set the velocity computation 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” to set in H02 when setting
60 seconds.
•
Setting range of velocity computation time:
0 to 320,000 seconds (about 3.7 days) with 4 significant digits
Minimum unit is 1 second (however, 0.1 second is possible for
4 seconds or shorter).
( e.g. 12345% is impossible, 12340% is possible.)
First-order lag time constant (T) is set at % value in
[H01:
CONST]
. The value of 0 to 100% corresponds to that of 0 to 100
seconds.
•
Setting range of time constant:
0 to 799.0 seconds; minimum unit is 0.1 second.
•
Accuracy of moving average and time constant setting:
(±5.0% of set value) ± 1 second
6.9 VJX7-J (Linearizer)
This computing unit gives an optional relationship between the
input (X) and output (output-1=Y1, output-2=Y2) signals using an
optional line-segment function. The line-segment function has 21
breakpoints, which each gives an input-output relationship as a
percentage (%). Set the input (X) at % value in
[H01:CONST]
to
[H21:CONST]
, and the output (Y) at % value in
[H22:CONST]
to
[H42:CONST]
.
•
Breakpoint (21 points) setting conditions:
For input: -6.0≤X
0
(H01) to X
20
(H21)≤106.0%; minimum unit
is 0.01%
X0<X1<X2< ····· <X20
For output: -6.0≤Y
0
(H22) to Y
20
(H42)≤106.0%; minimum unit
is 0.01%
When input≤X
0
(H01), Y
0
(H21) is output.
When input≥
20
(H22), Y
20
(H42) is output.
Any number of line segments (1 to 20) can be set in H43.
The number of line segments 1 to 20 corresponds 100 to
2000%.
•
Computation accuracy:
±0.1 % (when line-segment gain is 1 or less)
6.10 VJX7-K (Ratio Setter)
This computing unit sets the ratio by the following expression.
Y1=Y2=K1
×
(X+A1)+A2
where Y1:
Output-1 signal (%)
Y2:
Output-2 signal (%)
X:
Input signal (%)
K1:
Ratio (no unit)
A1, A2: Bias (%)
Set the ratio (K1) in
[H01:CONST]
, and the bias (A1) at % value
in
[H02:CONST]
, and the bias (A2) at % value in
[H03:CONST]
.
•
Setting range of ratio:
-320 to 320 with 4 significant digits; minimum unit is 0.00001.
•
Setting range of bias:
-32,000% to 32,000% with 4 significant digits; minimum unit is
0.001%.
•
Computation accuracy:
±0.1 % (when K1=1, A1=A2=0%)
7. LIST OF PARAMETERS
*3
Parameter Display Item
MODEL
Model
TAG NO
Tag no.
SELF CHK
Self-check result
A
DISPLAY1
Display1
A01
INPUT1
Input value 1
A07
OUTPUT1
Output value 1
A08
OUTPUT2
Output value 2
A19
T1
Temporary memory 1
A20
T2
Temporary memory 2
A21
T3
Temporary memory 3
A22
T4
Temporary memory 4
A26
DO
Digital output
A27
LOAD
Load factor
A54
STATUS
Status
*1
A56
REV NO
Rev. no.
A58
MENU REV
MENU REV
A60
SELF CHK
Self-check result
B
DISPLAY2
Display2
B01
INPUT1
Input value 1
B07
OUTPUT1
Output value 1
B08
OUTPUT2
Output value 2
B19
T1
Temporary memory 1
B20
T2
Temporary memory 2
B21
T3
Temporary memory 3
B22
T4
Temporary memory 4
B26
DO
Digital output
B28
LOAD
Load factor
B60
SELF CHK
Self-check result
D
SET (I/O)
Setting (I/O)
*2
D01
TAG NO.1
Tag no. 1
D02
TAG NO.2
Tag no. 2
D03
COMMENT1
Comment 1
D04
COMMENT2
Comment 2
D12
INP TYPE
Input type
D13
IN RESIST
Input resistor
D32
INPUT1 L_RNG
Input low range
D33
INPUT1 H_RNG
Input high range
D32
OUT1 L_RNG
Output-1 low range
*4
D33
OUT1 H_RNG
Output-1 high range
*4
D34
OUT2 L_RNG
Output-2 low range
*4
D35
OUT2 H_RNG
Output-2 high range
*4
D45
PRGM SELECT
Selection of program
D48
CYCLE TIME
Computing period
D50
OUT1 DR
Direction of output-1 action
D51
OUT2 DR
Direction of output-2 action
D59
NMRR
Frequency setting
*4
D60
SELF CHK
Self-check result
F
SET(COM)
Setting (communication)
*2
F01
PROTOCOL
Communication protocol
F02
ADDRESS
Address
F03
BAUD RATE
Baud rate
F04
PARITY
Parity
F05
DATA LEN
Data Length
F06
STOP BIT
Stop bit
F07
INPUT DEC PT
Decimal point position of input
F60
SELF CHK
Self-check result
G
PROGRAM
Program of computing unit
G01
PROGRAM
Program
⁞
⁞
⁞
G59
PROGRAM
Program
G60
SELF CHK
Self-check result
H
CONST
Fixed constant of computing unit
H01
CONST
Fixed constant
⁞
⁞
⁞
H59
CONST
Fixed constant
H60
SELF CHK
Self-check result
P
ADJUST
Adjustment
*2
P04
IN1 ZERO ADJ
Zero adjustment of input-1
P05
IN1 SPAN ADJ
Span adjustment of input-1
P30
OUT1ZERO ADJ
Zero adjustment of output-1
P31
OUT1SPAN ADJ
Span adjustment of output-1
P32
OUT2ZERO ADJ
Zero adjustment of output-2
P33
OUT2SPAN ADJ
Span adjustment of output-2
P40
RESISTOR ADJ
Adjustment of external input resistance
P60
SELF CHK
Self-check result
Q
TEST
Test
*2
Q04
OUT1 TEST
Forced output (output-1)
Q05
OUT2 TEST
Forced output (output-2)
Q14
RLY1 TEST
Forced output (relay-1)
Q15
RLY2 TEST
Forced output (relay-2)
Q60
SELF CHK
Self-check result
*1
The Status is displayed for service personnel to see history
records.
*2
There are items not displayed depending on what output-2 is
specified.
*3
There are items not displayed depending on what the setting
of program selection is specified.
*4
The parameters are the items to be set at the factory.
5
IM 77J01X07-01E 4th Edition
Feb.20. 2017-00