WAGO 753-668/000-004, Manual

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4 Table of Contents WAGO-I/O-SYSTEM 750
753-668/000-004 4FAI 0/4-20 mA Diff PROFIsafe
Manual
Version 1.0.0, valid from HW/SW Version 01/01
3.6.10.2 Safety Response Time of Analog Inputs for
Two-Channel Applications without
Discrepancy Monitoring ............................................................... 41
3.6.10.3 Safety Response Time of Analog Inputs for
Two-Channel Applications with
Discrepancy Monitoring ............................................................... 42
3.6.10.3.1 Accuracy of Discrepancy Monitoring ....................................... 43
3.6.10.3.1.1 Secure Detection of a Discrepancy Timeout ....................... 44
3.6.10.3.1.2 Secure Non-Detection of a Discrepancy Timeout ............... 45
3.7 Approvals ............................................................................................. 46
3.8 Standards and Guidelines .................................................................... 47
3.8.1 Transport and Storage Conditions.................................................... 48
4 Functions ................................................................................................. 49
4.1 Analog Value Data Format ................................................................... 49
4.2 Sampling Frequency ............................................................................. 50
4.3 Acknowledging Errors ........................................................................... 51
4.4 Module- or Channel-Granular Passivation in
PROFIsafe Mode V2.4.......................................................................... 53
4.5 Single- or Two-Channel Use of Analog Inputs ...................................... 54
4.6 Tolerance Window for Two-Channel Evaluation ................................... 55
4.7 Setting the Relative or Absolute Tolerance ........................................... 58
4.8 Discrepancy Time ................................................................................. 59
4.9 Definition of the Unit Value ................................................................... 60
4.10 Setting the Measurement Range .......................................................... 61
4.11 Setting the Substitute Values ................................................................ 62
4.12 Moving Average Input Measurement Values ........................................ 63
4.13 Wire Break Detection ............................................................................ 64
4.14 Enabling/Disabling Channels ................................................................ 65
5 Process Image ......................................................................................... 66
5.1 PROFIsafe Mode V2.4.......................................................................... 67
5.2 PROFIsafe Mode V2.6.......................................................................... 68
5.3 Input Process Value ............................................................................. 68
5.4 Channel Status Byte ............................................................................. 69
5.5 WAGO Status Byte ............................................................................... 69
5.6 PROFIsafe Status Byte......................................................................... 69
5.7 WAGO Control Byte ............................................................................. 69
5.8 PROFIsafe Control Byte ....................................................................... 69
5.9 Analog Value Data Format of Input Process Values ............................. 70
5.9.1 Format Siemens S7 with Fixed Substitute Values ............................ 70
5.9.1.1 Measurement Range 0
… 20 mA ................................................ 70
5.9.1.2 Measurement Range 4
… 20 mA with
Wire Break Detection Enabled ..................................................... 71
5.9.1.3 Measurement Range 4
… 20 mA with
Wire Break Detection Disabled .................................................... 71
5.9.2 Format Siemens S7 with Parameterizable
Substitute Values ............................................................................. 72
5.9.2.1 Measurement Range 0
… 20 mA ................................................ 72
5.9.2.2 Measurement Range 4
… 20 mA with
Wire Break Detection Enabled ..................................................... 72