YOKOGAWA VJX7, User Manual

Page: 5 / 6

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