Configuration
EP31xx78 Version: 2.4
Undershoot and overshoot of the measuring range (underrange, overrange), index 0x60n0:01,
0x60n0:02 [
}
135]
Chapter Data stream and correction calculation contains a clear description of the correction calculation
between the raw values and the output values if the limit ranges are exceeded.
The underrange bit is set if, based on the raw value, a value of 0x1300 is undershot by 1 bit.
The overrange bit is set if the value of 0x7FFF is exceeded by 1 bit.
Error bit (index 0x60n0:07), Error LED
The Error bit and the Error LED are set if, based on the raw value,
a value of approx. 0.5mA below 4mA is undershot or
a value of approx. 0.5mA above 20mA is exceeded.
• This prevents the triggering of the Error LED if the sensor transmits a little more than 20mA.
Limit 1 ad Limit 2, index 0x80n0:13, index 0x80n0:14 [
}
124]
If the limits of the values that can be entered in indices 0x80n0:13 [}124] and 0x80n0:14 [}124] are violated,
the bits in indices 0x60n0:03 [}135] and 0x60n0:05 [}135] are set accordingly (see sample below). The
indices 0x80n0:07 [}124] or 0x80n0:08 [}124] serve to activate the limit value monitoring.
Output limit n (2-bit):
• 0: not active
• 1: Value < limit value
• 2: Value > limit value
• 3: Value = limit value
Limit evaluation
The limit evaluation assumes a signed representation. The conversion to the desired representation
(index 0x80n0:02) only takes place after the limit evaluation.
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