ABB ACS 160, User Manual

Page: 96 / 138

86 ACS 160 User’s 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
PROCESS VAR
1 and 0135
PROCESS VAR
2. Value is
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.
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
P VAR
1
SEL
= 0103 (
OUTPUT FREQ
)
3403
P VAR
1
MULTIP
= 314
3404
P VAR
1
DIVISOR
= 1000
3405
P VAR
1
SCALING
= 1
Check what is the decimal point location on variable selected with parameter 3402
P VAR
1
SEL
.
In this case the chosen variable 0103
OUTPUT FREQ
is displayed with 0.1 Hz resolution. Therefore
3405 = 1 must be selected. See Figure 21.
Code Description
3402 P VAR 1 SEL
Selection of process variable 1. Number of any parameters of the group 1
OPERATING DATA
(excluding
parameters 0134
PROCESS VAR
1 and 0135
PROCESS VAR
2).
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.
Figure 21 Display with different decimal point
locations when calculated value is 125.
3407 P VAR 2 SEL
Selection of process variable 2. Number of any parameters of the group 1
OPERATING DATA
(excluding
parameters 0134
PROCESS VAR
1 and 0135
PROCESS VAR
2).
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.
Value Display
0 125
1 12.5
2 1.25
3 0.125
line speed =
output freq * 314
1000
m/s