Siemens simatic et 200s Operating Instructions Manual page 363

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 a parameter assignment error, the absence of 2L+ load voltage, a short circuit
of the sensor supply or a wire break/short circuit of the encoder signals, the 1PosU
generates a channel-specific diagnostics on 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 (load voltage missing, 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_2L+
or 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 1PosU reports the errors as
soon as they are detected and deletes them as soon as they have been eliminated.
ET 200S Positioning
Operating Instructions, 05/2007, A5E00124871-04
Response of the 1PosU
The MODE started is not executed.
•
The current run is stopped.
•
– All 3 digital outputs are set to 0.
– Feedback bit POS_ERR = 1
– Feedback bit POS_DONE = 0
Response of the 1PosU
The activated JOB is not executed.
•
– Feedback bit JOB_ERR = 1
Distributed I/O Device
Response of the 1PosU
Feedback bit ERR_2L+ = 1
and/or
feedback bit ERR_ENCODER = 1
The 1PosU sets the feedback bits ERR_2L+ = 0 and
ERR_ENCODER = 0.
This tells you that the cause has been eliminated and
acknowledged.
If ERR_2L+ is still 1 and/or ERR_ENCODER = 1, the cause
of the error is not yet eliminated.
1PosUniversal/Digital
7.6 Functions of the 1PosU
manual).
363