D
3--
02
D
A
2-
C
ha
nn
el
A
na
lo
g
O
utp
ut
6--5
D3--02DA 2-Channel Analog Output
Module Operation
Before you begin writing the control program, it is important to take a few minutes to
understand how the module processes and represents the analog signals.
The D3--02DA module updates both channels in the same scan. The control
program updates the two channels of this module independent of each other and
each channel does not have to be refreshed on each scan.
Channel 1
Scan N
Calculate the data
Write data
I/O Update
Execute Application Program
Scan N+1
Scan N+2
Scan N+3
Scan N+4
Scan
Channel 2
Channel 1
Channel 2
Channel 1
Channel 2
Channel 1
Channel 2
Channel 1
Channel 2
Channel Scanning
Sequence
