Siemens simatic et 200s Operating Instructions Manual page 100

1PosInc/Digital
3.6 Functions of the 1PosInc/Digital
Load Voltage 2L+ Missing
Wire Break/Short Circuit of the Encoder Signals
Prerequisite:
You must enable the encoder signal diagnostics
•
parameter in order to allow error recognition for the
signals A, /A and B, /B.
You must enable the zero marker diagnostics
•
parameter in order to allow error recognition for the
signals N, /N. If you use an encoder without a zero
mark, switch off error detection.
Causes:
Wire break or short circuit of the encoder signals at
•
terminals 1, 5 or 3, 7 or 4, 8.
What to Do:
Check the wiring and correct the short circuit.
•
Acknowledge the error with the EXTF_ACK control
•
bit.
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 1PosInc/Digital
generates a channel-specific diagnostics on the connected CPU/master. To do this, you
must enable the Group Diagnostics parameter (see the
100
Response of the 1PosInc/Digital
Response of the 1PosInc/Digital
The current reference point run, relative positioning, and
•
absolute positioning modes are stopped; it is not possible to
start a new run in these modes.
– All 3 digital outputs are set to 0.
– Feedback bit POS_ERR = 1
– Feedback bit POS_DONE = 0
Feedback bit ERR_ENCODER = 1
•
Feedback bit SYNC = 0
•
Generate channel-specific diagnostics
•
Waits for error acknowledgment EXTF_ACK
•
Inching MODE is not affected by this error.
•
The current JOB (reference signal evaluation) is canceled.
•
Response of the 1PosInc/Digital
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 1PosInc/Digital
The activated JOB is not executed.
•
– Feedback bit JOB_ERR = 1
Distributed I/O Device
Operating Instructions, 05/2007, A5E00124871-04
manual).
ET 200S Positioning