IMO iSmart V4 - Analog Output Module 2 AO

Chapter 9 Expansion Module 225
Analog Output Module 2AO
iSmart 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 500Ω
0mA~20mA
Load impedance
should be
smaller than 500Ω
Differentiation 10mV 40μA
Digital output 0.00V~10.00V 0.00mA~20.00mA
Register
value
AQ01~AQ04
0~1000 0~500
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 SMT displays the code of selected coil when SMT 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