X20 system modules • Analog input modules • X20AI2322
X20 system User's Manual 3.10
175
4.3.5.8.10 Input status
Name:
StatusInput01
This register is used to monitor the module inputs. A change in the monitoring status generates an error message.
Data type
Value
USINT
See bit structure.
Bit structure:
Bit
Description
Value
Information
00
No error
01
Lower limit value exceeded
0 - 1
Channel 1
10
Upper limit value exceeded
00
No error
01
Lower limit value exceeded
2 - 3
Channel 2
10
Upper limit value exceeded
4 - 7
Reserved
0
Limiting the analog value
In addition to the status information, the analog value is set to the values listed below by default when an error
occurs. The analog value is limited to the new values if the limit values were changed.
Digital value for error (default values)
Error status
0 to 20 mA
4 to 20 mA
Upper limit value exceeded
+32767 (0x7FFF)
Lower limit value exceeded
0
-8191 (0xE001)
4.3.5.8.11 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
Inputs without filtering
100 µs
Inputs with filtering
500 µs
4.3.5.8.12 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
Inputs without filtering
300 µs for all inputs
Inputs with filtering
1 ms
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