Group 34: Process Variables - ABB ACS 160 User Manual

Group 34: Process Variables

Parameters of this group can be used to create custom process variables. Values of process
variables can be seen in parameters 0134
calculated by taking given parameter from the operating data group (Group 1), and multiplying and
dividing it with given coefficients. The number of displayed decimal digits is configurable.
See example below.
Code Description
3402 P VAR 1 SEL
Selection of process variable 1. Number of any parameters of the group 1
parameters 0134
3403 P VAR 1 MULTIP
Process variable 1 multiplier.
3404 P VAR 1 DIVISOR
Process variable 1 divider.
3405 P VAR 1 SCALING
Decimal point location of process variable 1, when
displayed. Refer to Figure 21.
3407 P VAR 2 SEL
Selection of process variable 2. Number of any parameters of the group 1
parameters 0134
3408 P VAR 2 MULTIP
Process variable 2 multiplier.
3409 P VAR 2 DIVISOR
Process variable 2 divider.
3410 P VAR 2 SCALING
Decimal point location of process variable 2, when displayed.
Example. Assume that a two pole motor is directly connected to a roll 0.1 m in diameter and the line
speed is to be displayed in m/s. Since 1 Hz output equals 1 rev/s, equals PI * 0.1 m/s line speed, or
approximately 0.314 m/s, is:
The following settings are then needed:
3402 1 = 0103 (
P VAR SEL
3403 1
P VAR MULTIP
3404 1
P VAR DIVISOR
3405 1
P VAR SCALING
Check what is the decimal point location on variable selected with parameter 3402
In this case the chosen variable 0103
3405 = 1 must be selected. See Figure 21.
86
1 and 0135
PROCESS VAR
1 and 0135
PROCESS VAR
line speed =
)
OUTPUT FREQ
= 314
= 1000
= 1
OUTPUT FREQ
1 and 0135
PROCESS VAR
2).
PROCESS VAR
Value
0
1
2
3
Figure 21 Display with different decimal point
locations when calculated value is 125.
2).
PROCESS VAR
output freq * 314
1000
is displayed with 0.1 Hz resolution. Therefore
2. Value is
PROCESS VAR
(excluding
OPERATING DATA
Display
125
12.5
1.25
0.125
(excluding
OPERATING DATA
m/s
P VAR
ACS 160 User's Manual
1 .
SEL