Danfoss VLT 380-500 V, Руководство по конструкции

Страница: 137 / 170

Comparators
Comparators are used for comparing continuous variables
(output frequency, output current, and analog input) to
fixed preset values.
Par. 13-11
Comparator Operator
=
TRUE longer than.
. . .
. . .
Par. 13-10
Comparator Operand
Par. 13-12
Comparator Value
130BB672.10
Illustration 14.10 Comparators
Logic rules
Combine up to 3 boolean (true/false) inputs from timers,
comparators, digital inputs, status bits, and events using
the logical operators AND, OR, and NOT.
. . .
. . .
. . .
. . .
Par. 13-43
Logic Rule Operator 2 Par. 13-41
Logic Rule Operator 1
Par. 13-40
Logic Rule Boolean 1
Par. 13-42
Logic Rule Boolean 2
Par. 13-44
Logic Rule Boolean 3
130BB673.10
Illustration 14.11 Logic Rules
Application example
Parameters
FC
+24 V
+24 V
D IN
D IN
D IN
COM
D IN
D IN
D IN
D IN
+10 V
A IN
A IN
COM
A OUT
COM
R1
R2
12
13
18
19
20
27
29
32
33
37
50
53
54
55
42
39
01
02
03
04
05
06
130BB839.10
Function Setting
Parameter 4-30
Motor Feedback
Loss Function [1] Warning
Parameter 4-31
Motor Feedback
Speed Error 100 RPM
parameter 4-32
Motor Feedback
Loss Timeout 5 s
Parameter 7-00 S
peed PID
Feedback Source [2] MCB 102
Parameter 17-11
Resolution (PPR) 1024*
Parameter 13-00
SL Controller
Mode [1] On
Parameter 13-01
Start Event [19] Warning
Parameter 13-02
Stop Event [44] Reset key
Parameter 13-10
Comparator
Operand [21] Warning
no.
Parameter 13-11
Comparator
Operator [1] ≈*
Parameter 13-12
Comparator
Value 90
Parameter 13-51
SL Controller
Event [22]
Comparator 0
Parameter 13-52
SL Controller
Action [32] Set
digital out A
low
Parameter 5-40 F
unction Relay [80] SL digital
output A
*=Default Value
Notes/Comments:
If the limit in the feedback monitor is exceeded, warning 90,
Feedback Monitor is issued. The SLC monitors warning 90,
Feedback Monitor . If warning 90, Feedback Monitor becomes true,
Relay 1 is triggered.
External equipment may then indicate that service may be
required. If the feedback error goes below the limit again within
5 s, the frequency converter continues and the warning
disappears. Press [Reset] on the LCP to reset relay 1.
Table 14.3 Using SLC to Set a Relay
Controls Design Guide
MG37N102 Danfoss A/S © 6/2016 All rights reserved. 135
14 14