Siemens simatic et 200s Operating Instructions Manual page 172

1PosInc/Analog
4.6 Functions of the 1PosInc/Analog
Errors in the Control of MODEs and JOBs
POS_ERR
Causes:
Certain requirements or conditions have not been
•
met at the start of a MODE
JOB_ERR
Causes:
Certain requirements or conditions have not been
•
met at the activation of a JOB
Generating a Channel-Specific Diagnostics
In the event of parameter assignment errors (short circuit of the sensor supply or open
circuit/short circuit of the sensor signals), the 1PosInc/Analog generates a channel-specific
diagnostics for the connected CPU/master. To do this, you must enable the Group
Diagnostics parameter (see the
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
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
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 1PosInc/Analog reports the
errors as soon as they are detected and deletes them as soon as they have been eliminated.
172
Response of the 1PosInc/Analog
The MODE started is not executed.
•
The current run is stopped.
•
– Analog output is slowed down to 0 V using the ramp.
– Feedback bit POS_ERR = 1
– Feedback bit POS_DONE = 0
Response of the 1PosInc/Analog
The activated JOB is not executed.
•
– Feedback bit JOB_ERR = 1
Distributed I/O Device
Response of the 1PosInc/Analog
Feedback bit ERR_ENCODER = 1
The 1PosInc/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.
Operating Instructions, 05/2007, A5E00124871-04
manual).
ET 200S Positioning