Chapter 9 Expansion Module
225
Analog Output Module 2AO
SG2 main unit can connect with two 2-channel, 12bits analog output module, 2AO, at the same time. The close
one will be auto-assign to AQ01~AQ02, and the other is distributed to AQ03~AQ04. It can out 0~10V voltage signal
or 0~20mA current signal, and the data in the 12bits data register, DRD4~DRD7, will determined the output of AO
channel. See the below table for more information.
content standard
Mode
voltage current
Analog output range
0V~10V
Load impedance should be
bigger than 500
Ω
0mA~20mA
Load impedance should be
smaller than 500
Ω
Differentiation 10mV
40
μ
A
Digital output
0.00V~10.00V
0.00mA~20.00mA
AQ01~AQ04
0~1000 0~500
Register
value
DRD4~DRD7 0~4095
0~2047
Definition
±
2.5%
±
2.5%
The output mode of AQ is set by the current value of DRD0~DRD3
Output
Register
Mode
Register
Mode
DRD0~DRD3
data
definition
Channel 1: AQ01
DRD4
DRD0
1
0: voltage mode and reset value when stop;
Channel 2: AQ02
DRD5
DRD1
2
1: Current mode and reset value when stop;
Channel 3: AQ03
DRD6
DRD2
3
2: voltage mode and keep value when stop;
Channel 4: AQ04
DRD7
DRD3
4
3: Current mode and keep value when stop;
※
Analog output works in mode 1 if the value of the mode register, DRD0~DRD3, is larger than 3.
The appearance of AQ value on the HMI screen
The HMI on SG2 displays the code of selected coil when SG2 at STOP mode, and showing the current
value at RUN mode, see the below figure to get more information.
STOP display RUN display
When AQ mode is in current mode, the relationship among
the DR, AQ output and display value is shown as below:
DRD5=2047, AQ02=500, display: 20.00mA
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