
User Manual UMAX030541. Version V1 9-116
1.3.
Analog Output Function Block
The analog output (AO) function block is the default logic associate with all four outputs.
There are many objects associated with the analog output function block, but not all of
them apply to all output types or control conditions. To start with, object 6310h
AO Output
Type
defines how the output drive circuitry will be configured as per Table 4. This table
also shows the output units and default ranges for each type. By default, analog outputs
are configured as
10, Output Voltage
types.
Value Meaning
Range [Unit]
0
Output Disabled
N/A
10
Output Voltage
-10000 to 10000 [mV]
20
Output Current
-20 to 20 [mA]
30
Output Frequency
0 to 30000 [Hz]
40
Output PWM
0 to 1000 [0.1% D.C.]
1000 Digital ON/OFF
0 (OFF) or 1 (ON)
Table 4
– Object 6310h - AO Output Type Options
When the output type is changed, all objects related to the output (scaling PV, Decimal
Digits PV, etc) are automatically updated by default. Object 5550h
Enable Auto Updates
enables/disables automatic updates. When disabled (set to False), the objects are to be
manually configured.
Ranges in table are the largest ranges for each type, the actual ranges for the outputs
can be configured by Object 7320h
AO Scaling 1 PV
, 7321h
AO Scaling 1 FV
, 7322h
AO Scaling 2 PV
and 7323h
AO Scaling 2 FV
, together when Objects 7300h
AO Output
PV
is used to control the proportional outputs. The control signal of the outputs will have
associated with it a minimum and maximum values. Besides type Digital ON/OFF, all the
other output types are always responding in a linear fashion to changes in the control
source per the calculation in Figure 3.
min
*
min
min
max
min
max
X
m
Y
a
X
X
Y
Y
m
a
mx
y
−
=
−
−
=
+
=
Figure 3
– Linear Slope Calculations
X and Y are defined as:
Xmin = “
AO Scaling 1 PV
”
Ymin = “
AO Scaling 1 FV
”
Xmax = “
AO Sacling 2 PV
”
Ymax = “
AO Scaling 2 FV
”