1PosSSI/Analog
6.6 Functions of the 1PosSSI/Analog
ET 200S Positioning
Operating Instructions, 05/2007, A5E00124871-04
293
Error Acknowledgment EXTF_ACK
You must acknowledge the corrected errors (short circuit of the sensor supply and open
circuit/short circuit of the sensor signals).
What You Do Response of the 1PosSSI/Analog
Feedback bit ERR_ENCODER=1
Your control program detects the set feedback bit
ERR_ENCODER.
Execute your application-specific error response.
Eliminate the cause of the error.
Switch the EXTF_ACK control bit from 0 to 1 The 1PosSSI/Analog sets the feedback bit
ERR_ENCODER = 0.
This tells you that the cause has been eliminated and
acknowledged.
If ERR_ENCODER = 1, the cause of the error is not yet
eliminated.
Switch the EXTF_ACK control bit from 1 to 0
In the case of constant error acknowledgment (EXTF_ACK = 1) or at CPU/Master Stop, the 1PosSSI/Analog reports the
errors as soon as they are detected and deletes them as soon as they have been eliminated.
Parameters
Parameters Meaning Value range Default setting
Enables
Group diagnostics An encoder error (ERR_ENCODER) or parameter
assignment error results in a channel-specific
diagnostics if group diagnostics is enabled.
• Disable
• Enable
Disable
Encoder signal
diagnostics
Encoder signals D, /D and C, /C are monitored for short
circuit and wire break.
• On
• Off
On
Feedback Messages
Address Assignment
Byte 0 Bit 7: ERR_ENCODER
Bit 3: SYNC
Bit 2: POS_ DONE
Bit 1: POS_ERR
Bit 0: POS_ACK
Byte 4 Bit 1: JOB_ERR
Bit 0: JOB_ACK
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