37
3 System Operation
If the actual value is outside the 1
st
monitoring band, the compound is stopped. After the pa-
rameterised time fault 231-235 occurs.
The 2
nd
monitoring band is standard 40 digit above the 1
st
monitoring band.
If the actual value is outside the 2
nd
monitoring band, there is an immediate shutdown (3 sec).
Check control element, actuation and feedback.
A relay may be "sticking”.
The system may not have been in the starting position when starting (all channels closed).
The motor is possibly defective (direction of rotation reversed).
E12 Integral rev. speed sensor
During motor startup, the display increases from ca. 0-7 digits until it suddenly jumps back
again to 0-7 digits.
The sensing pulses are too short, or the contact gap between Namur sensor and measured
object is too small, to allow error-free measurement at higher rev. speeds..
Check the Namur sensor's connection:
– The measuring point should be made of steel if possible
– Contact gap as small as possible
– The measuring point must be at least as large as the sensor element's range
E13
Fault 141...145
Only with three-point step control output.
The feedback values vary more rapidly than the maximum specified in the parameter section
Check potentiometers for short-circuits
otherwise
Change potentiometers
E14 Text message Channel X does not reach aeration position in time and/or fault 600.
The range monitoring during pre-ventilation results in a too low limit stop value of the feedback
potentiometer. The upper and lower limit value are not reached during pre-ventilation.
Check potentiometer
Check continuous feedback value
Compare range limits with feedback’s stop values
If necessary, re-enter range limits
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