AutomationDirect DL205 - Output Channel Update Sequence (Pointer Method)

DL205 Analog Manual, 7th Edition Rev. D
15-10
Chapter 15: F2-8AD4DA-1, 8-Ch. In / 4-Ch. Out Analog Current Combination
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Output Channel Update Sequence (Pointer Method)
If the F2-8AD4DA-1 is installed in a local (CPU) base, all four output channels can be updated
on every scan. However, only one channel can be updated per scan if the module is installed in
an expansion, remote I/O, or Profibus slave base. The timing is synchronized with the timing
of reading the input channels, so each output channel can be updated every eight scans.
Calculatethe data
Writedata
Read inputs
ExecuteApplication Program
Scan
Writetooutputs
Ch 1, 2, 3, 4Scan N
Scan N+1
Scan N+2
Scan N+3
Ch 1, 2, 3, 4
Ch 1, 2, 3, 4
Ch 1, 2, 3, 4
Scan N+4
Ch 1, 2, 3, 4
System with
analogmodule
installedin local
(CPU)base.
Scan N
Read the data
Store data
Read Inputs
ExecuteApplicationProgram
Scan N+1
Scan N+2
Scan N+6
Scan
WritetoOutputs
Scan N+7
Ch 1
Ch 2
Ch 3
Ch 4
Scan N+3
System with analog
moduleinstalledin
expansion,remote I/O
or Profibusslave base.
Scan N+8 Ch 1