Beckhoff EP31 Series User Manual

Configuration
EP31xx 77Version: 2.4
Presentation, index 0x80n0:02 [
}
124]
The measured value output is set in factory to two's complement representation (signed integer).
Index 0x80n0:02 [}124] offers the possibility to change the method of representation of the measured value.
• Signed integer representation
The negative output value is represented in two’s complement (negated + 1).
Maximum representation range with 16-bit = -32768 .. +32767
dec
Input signal Value
+/- 10V 0...20mA 4...20mA 0...10V decimal hexadecimal
10V 20mA 20mA 10V 32767 0x7FFF
5V 10mA 12mA 5V 16383 0x3FFF
0V 0 mA 4 mA 0V 0 0x0000
-5V - - - -16383 0xC001
-10V - - - -32767 0x8000
Overview of further representations
• Unsigned integer representation
The output value is represented with 15-bit resolution without sign, therefore polarity detection is no longer
possible.
Maximum representation range with 16-bit = 0 .. +32767
dec
• Absolute value with MSB as sign - representation
The output value is displayed in magnitude-sign format: MSB=1 (highest bit) in the case of negative values.
Maximum representation range with 16-bit = -32768 .. +32767
dec
Input values (+/- 10V) Representation (values dec. / values hex.)
unsigned integer Absolute value with MSB as sign
10 32767 / 0x7FFF 32767 / 0x7FFF
5V 16383 / 0x3FFF 16383 / 0x3FFF
0V 0 / 0x0000 0 / 0x0000
-5 16384 / 0x4000 [-16384] / 0xC000
-10 32767 / 0x7FFF [-32767] / 0xFFFF
Presentation types
The presentation types Unsigned integer and Absolute value with MSB as sign have no function for
unipolar modules. There is no change in the presentation in the positive range.
Siemens bits, index 0x80n0:05 [
}
124]
If this bit is set, status displays are superimposed on the lowest three bits. In the error case "overrange" or
"underrange", bit 0 is set.

Beckhoff EP31 Series Specifications

General

Brand	Beckhoff
Model	EP31 Series
Category	Control Unit
Language	English