WEG CFW501 V1.8X, Руководство по программированию, Страница: 114 / 192

Digital and Analog Inputs and Outputs
12-6 | CFW501
12
P0243 – Input Signal AI3
Adjustable
Range:
0 = 0 to 10 V / 20 mA
1 = 4 to 20 mA
2 = 10 V / 20 mA to 0
3 = 20 to 4 mA
4 = –10 V to +10 V Factory
Setting:
0
Properties:
cfg
Access groups
via HMI:
I/O
Description:
These parameters configure the signal type (if current or voltage) that will be read in each analog input, as well
as its variation range. Note that only AI3 has option 4 (-10 V to +10 V). In options 2 and 3 of the parameters, the
reference is inverted, that is, we have the maximum speed with the minimum signal in the Alx.
In the CFW500 plug-in module, DIP Switch S1:1 in ON configures input AI1 for signal in current. In the other
cases, refer to the installation, configuration and operation guide of the plug-in used.
Table 12.2: Alx configuration
and equation on page 12-6 below summarizes the configuration and equation of the analog inputs.
Table 12.2: Alx configuration and equation
Signal
P0233,
P0238
P0243 DIP Switch Equation AIx (%)
0 to 10 V 0 0 OFF
AIx = x (100 %) + Offset x Gain
AIx(V)
10 V
( (
0 to 20 mA 0 0 ON
AIx = x (100 %) + Offset x Gain
AIx(mA)
20 mA
( (
4 to 20 mA 1 1 ON
AIx = x (100 %) + Offset x Gain
(AIx(mA) – 4 mA)
16 mA
(
( (
(
10 to 0 V 2 2 OFF
AIx = 100 % – x (100 %) + Offset x Gain
AIx(V)
10 V
( (
20 to 0 mA 2 2 ON AIx = 100 % – x (100 %) + Offset x Gain
AIx(mA)
20 mA
( (
20 to 4 mA 3 3 ON
AIx = 100 % – x (100 %) + Offset x Gain
(AIx(mA) – 4 mA)
16 mA
(
( (
(
-10 to +10 V - 4 OFF
AIx = x (100 %) + Offset x Gain
AIx(V)
10 V
( (
For example: AIx = 5 V, Offset = -70.0 %, Gain = 1.000, with signal of 0 to 10 V, that is, AIx
ini
= 0 and AIx
FE
= 10.
AIx(%) = x (100 %) + (-70 %) x 1 = –20.0 %
5
10
( (
Another example: AIx = 12 mA, Offset = -80.0 %, Gain = 1.000, with signal of 4 to 20 mA, that is, AIx
ini
= 4 and
AIx
FE
= 16.
AIx(%) = x (100 %) + (–80 %) x 1 = –30.0 %
12 – 4
16
( (
AIx’= –30.0 % means that the motor will spin counterclockwise with a reference in module equal to 30.0 % of
P0134 if the signal AIx function is "Speed Reference".
In the case of filter parameters (P0235, P0240 and P0245), the value set corresponds to the time constant used to
filer the input signal read. Therefore, the filter response time is around three times the value of this time constant.