Beckhoff EP31 Series User Manual

Configuration
EP31xx86 Version: 2.4
4.10 Calculation of process data
The terminal/box constantly records measured values and saves the raw values from its A/D converter in the
ADC raw value object 0x80nE:01. The calculation of the correction with the vendor calibration values takes
place after each acquisition of the analog signal. This is followed (optionally) by user scaling:
Y
H
= (X
ADC
-B
H
) * A
H
measured value after vendor calibration (corresponds to X
ADC
if index 0x80n0:0B inactive)
Y
A
= (Y
H
-B
A
) * A
A
measured value after user calibration (corresponds to Y
H
if index 0x80n0:0A inactive)
YS= YA * AS * 22-16 + BS measured value after user scaling (corresponds to Y
A
if index 0x80n0:01 is
inactive)
Key
Name Name Index
X
ADC
Output value of the A/D converter 0x80nE:01
B
H
Vendor calibration offset (can only be changed if the object Producer codeword
0xF008 is set)
0x80nF:01
A
H
Vendor calibration gain (can only be changed if the object Producer codeword
0xF008 is set)
0x80nF:02
Y
H
Measured value after vendor calibration -
B
A
User calibration offset 0x80n0:11
A
A
User calibration gain 0x80n0:12
Y
S
Measured value after user calibration -
B
S
User scaling offset (can be activated via index 0x80x0:0A) 0x80n0:17
A
S
User scaling gain (can be activated via index 0x80x0:0A) 0x80n0:18
Y
S
Process data for control, measured value after user scaling -
4.11 TwinSAFE SC
4.11.1 TwinSAFE SC - operating principle
The TwinSAFE SC (Single Channel) technology enables the use of standard signals for safety tasks in any
networks of fieldbuses. To do this, EtherCAT Terminals from the areas of analog input, angle/displacement
measurement or communication (4…20mA, incremental encoder, IO-Link, etc.) are extended by the
TwinSAFE SC function. The typical signal characteristics and standard functionalities of the I/O components
are retained. TwinSAFE SC I/Os have a yellow strip at the front of the housing to distinguish them from
standard I/Os.
The TwinSAFE SC technology enables communication via a TwinSAFE protocol. These connections can be
distinguished from the usual safe communication via Safety over EtherCAT.
The data of the TwinSAFE SC components are transferred via a TwinSAFE protocol to the TwinSAFE logic,
where they can be used in the context of safety-relevant applications. Detailed examples for the correct
application of the TwinSAFE SC components and the respective normative classification, which were
confirmed/calculated by TÜV SÜD, can be found in the TwinSAFE application manual.
4.11.2 TwinSAFE SC - configuration
The TwinSAFESC technology enables communication with standard EtherCAT terminals via the Safety over
EtherCAT protocol. These connections use another checksum, in order to be able to distinguish between
TwinSAFESC and TwinSAFE. Eight fixed CRCs can be selected, or a free CRC can be entered by the user.
By default the TwinSAFESC communication channel of the respective TwinSAFE SC component is not
enabled. In order to be able to use the data transfer, the corresponding TwinSAFESC module must first be
added under the Slots tab. Only then is it possible to link to a corresponding alias device.

Beckhoff EP31 Series Specifications

General

Brand	Beckhoff
Model	EP31 Series
Category	Control Unit
Language	English