24
SI-I/O User Guide
Issue Number: 3
7.4
Menu 3 - Analog I/O
Menu 3 on the module controls and displays all parameters associated with the Analog I/O.
Analog inputs 1, 2 and 3 have a resolution of 12 bits. The input can operate in different modes as defined the mode selected in Pr
S.01.015
to Pr
S.01.017
including current modes.
The "Input Level" is defined for the different modes as shown in the table below.
Analog Inputs 1-3 (Pr
S.03.001
to Pr
S.03.003
) are derived as follows (Analog Input 1 is used for this example):
A
1
is the value after the minimum and maximum limits are applied.
If Analog Input 1 Minimum (Pr
S.03.014
)
≥
Analog Input 1 Maximum (Pr
S.03.015
) then: A
1
= 0.00 % whatever the input level is.
If Analog Input 1 Minimum (Pr
S.03.014
) < 0.00% and Analog Input 1 Maximum (Pr
S.03.015
) > 0.00 % then:
Input Level is limited between - Analog Input 1 Minimum (Pr
S.03.014
) and + Analog Input 1 Maximum (Pr
S.03.015
).
A
1
= Input Level x (100.00 % / Analog Input 1 Maximum (Pr
S.03.015
)
Otherwise:
Input Level is limited between Analog Input 1 Minimum (Pr
S.03.014
) and Analog Input 1 Maximum (Pr
S.03.015
).
A
1
= [(Input Level - Analog Input 1 Minimum (Pr
S.03.014
)) x 100.00 %] / [Analog Input 1 Maximum (Pr
S.03.015
) - Analog Input 1 Minimum (Pr
S.03.014
)].
The Differential Analog Input has a resolution of 16 bits. The minimum resolution of Pr
S.03.004
is 0.0030518 % (100 / 215 %).
The level of Differential Analog Input (Pr
S.03.004
) is calculated in the same way as Analog Inputs 1-3 (Pr
S.03.001
- Pr
S.03.003
).
The differential analog input is only available on Unidrive M600 - M800.
Analog Output 1 (Pr
S.03.005
) has a resolution of 12 bits plus sign. Analog Output 1 (Pr
S.03.005
) shows the value passed by Analog Output 1
Source (Pr
S.03.006
) which is then scaled by Analog Output 1 Scaling (Pr
S.03.007
) and clamped between -100.00 and 100.00%.
The analog output is only available on Unidrive M600 - M800.
S.03.001
Analog Input 1
S.03.002
Analog Input 2
S.03.003
Analog Input 3
Minimum
-100.00
Maximum
100.00
Default
Units
%
Type
16 Bit Volatile
Update Rate
250 µs write
Display Format
None
Decimal Places
2
Coding
RO, FI, ND, NC, PT
Mode
Input Level
Volt IN
(Input Voltage / 10 V) x 100.00 %
0-20mA
(Input Current / 20 mA) x 100.00 %
20-0mA
((20 mA – Input Current) / 20 mA) x 100.00 %
4-20mA
((Input Current – 4 mA) / 16 mA) x 100.00 %
20-4mA
((20 mA – Input Current) / 16 mA) x 100.00 %
S.03.004
Differential Analog Input
Minimum
-100.0000
Maximum
100.0000
Default
Units
%
Type
32 Bit Volatile
Update Rate
4 ms write
Display Format
None
Decimal Places
4
Coding
RO, ND, NC, PT
S.03.005
Analog Output 1
Minimum
-100.00
Maximum
100.00
Default
0.00
Units
%
Type
16 Bit Volatile
Update Rate
Background read
Display Format
None
Decimal Places
2
Coding
RO, PT
NOTE
NOTE
