Function AO: Fine tuning output frequency
(Only with software D2A-STD)
TAB2
The output frequency can be modified with an analog signal (0...10V) applied at the
configurable analog input (terminal 17; configuration mode 1, see page 20). In this
way is possible a fine tuning of the impased f
nom
rating frequency. This parameter de-
fines the maximum limit in percent of the f
max
1)
or (f
max
- f
min
)
2)
impased values.
Regulation field:
V
term. 17
= 0...5...10V:
[f
nom
- AO x (f
max
)]...f
nom
...[f
nom
+ AO x (f
max
)]
1)
[f
nom
- AO x (f
max
- f
min
)]...f
nom
...[f
nom
+ AO x (f
max
- f
min
)]
2)
1)
SW4 = ON
2)
SW4 = OFF
Example:AO = 10%; f
max
= 50Hz; f
min
= 10Hz; SW4 = OFF
speed reference = 5V
f
nom
= 25Hz
V
term. 17
= 0V
f
out
= 21Hz
V
term. 17
= 5V
f
out
= 25Hz
V
term. 17
= 10V
f
out
= 29Hz
Note: This function is disabled if terminal 17 is configured like an input for the
external current limit (see TAB1, SUBIMOT, function S).
SUB REF
Range: 0...100%
Default: 0%
Function SIO: SIO address
TAB2
SIO RS485 adress programming.
On the RS485 bus may be linked till 32 nodes (e. g. 1 Host and 31 inverters).
The network must be arranged in a linear form and the layout cables must be twisted
and/or shielded. It is recommended to finish the net at its endings with a 120 Ohm im-
pedance specially when the distances are long.
* The range of adress numbers depends on the installed software.
Software D2A-STD: 1...127.
Software D2A-1300: 1...15.
Range: OFF...1...127 *
Default: OFF
AO 0%
SIO OFF
BERGES electronic
09.07.2001 Operating manual ACM D2/S2 41
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