X20 system modules • Counter modules • X20DC1178
682
X20 system User's Manual 3.10
4.11.4.9.4.5 Net time of the last counter value change
Name:
Encoder01TimeChanged
For slow X2X Link cycles, the net time of the last counter value change can be used to more accurately determine
the speed.
The net time of the last counter value change is displayed as 16 or 32-bit value. Only the 16-bit value is available
in the bus controller function model.
Data type
Value
Information
INT
-32768 to 32767
DINT
1)
-2.147.483.648
bis 2.147.483.647
NetTime in µsec.
1)
Can only be configured in the standard function model
4.11.4.9.4.6 State of the encoder
Name:
EncoderCycleTimeViolation
EncoderDataError
This register displays the error states that occurred while determining the position. The error states are latched
when they occur and are maintained until acknowledged.
A cycle time error is triggered if:
•
Transfer is still active: This means that the defined cycle time is shorter than the time resulting from the
sum of the data bits and stop bits and the clock rate.
•
The monoflop level does not match the defined start level
•
There is an error pending on the signal line (open line, short circuit).
A data error is triggered if:
•
The parity bit does not match.
•
An error occurs on the signal line (open line, short circuit) during transfer.
Data type
Value
USINT
See bit structure.
Bit structure:
Bit
Name
Value
Information
0
No error
0
EncoderCycleTimeViolation
1
Error status - Cycle time violation
0
No error
1
EncoderDataError
1
Error status - Data error
2 - 7
Reserved
0
4.11.4.9.4.7 Acknowledging error status of the encoder
Name:
EncoderQuitCycleTimeViolation
EncoderQuitDataError
This register can be used to acknowledge the latched data error states from the encoder. However, if there are still
pending errors remaining, then the error status remains active. After acknowledging the errors, the bits must also
be reset or else any repetition of the error would be undetected.
Data type
Value
USINT
See bit structure.
Bit structure:
Bit
Name
Value
Information
0
No acknowledgment
0
EncoderQuitCycleTimeViolation
1
Confirmation of error status - Cycle time violation
0
No acknowledgment
1
EncoderQuitDataError
1
Confirmation of error status - Data error
2 - 7
Reserved
0
Summary of Contents for X20 System
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