X20 system modules • Digital input modules • X20DID371
1048
X20 system User's Manual 3.10
4.13.18.9.3.2 Input state of digital inputs 1 to 8
Name:
DigitalInput or
DigitalInput01 to DigitalInput08
This register is used to indicate the input state of digital inputs 1 to 8.
Function model 0 - Standard only:
The "packed inputs" setting in the AS I/O configuration is used to determine whether all of this register's bits should
be set up individually as data points in the AS I/O mapping ("DigitalInput01" through "DigitalInput08") or whether
this register should be displayed as an individual USINT data point ("DigitalInput").
Data type
Value
Information
0 to 255
Packed inputs = on
USINT
See bit structure
Packed inputs = off or function model <> 0 - Standard
Bit structure:
Bit
Name
Value
Information
0
DigitalInput01
0 or 1
Input state - Digital input 1
...
...
7
DigitalInput08
0 or 1
Input state - Digital input 8
4.13.18.9.4 Minimum cycle time
The minimum cycle time defines how far the bus cycle can be reduced without communication errors occurring.
It should be noted that very fast cycles decrease the idle time available for handling monitoring, diagnostics and
acyclic commands.
Minimum cycle time
Without filtering
100 μs
With filtering
150 μs
4.13.18.9.5 Minimum I/O update time
The minimum I/O update time defines how far the bus cycle can be reduced while still allowing an I/O update to
take place in each cycle.
Minimum I/O update time
Without filtering
100 μs
With filtering
200 μs
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