Siemens SIMATIC S5-90U User guide

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SIMATIC S5
S5-90U/S5-95U
Programmable Controller
System Manual
EWA 4NEB 812 6115-02b
Edition 03

STEP ® SINEC ® and SIMATIC ® are registered trademarks of Siemens AG.
LINESTRA® is a registered trademark of the OSRAM Company.
Subject to change without prior notice.
The reproduction, transmission or use of this document or its contents is
not permitted without express written authority. Offenders will be liable
for damages. All rights, including rights created by patent grant or
registration of a utility model or design, are reserved.
Copyright© Siemens AG 1994
EWA 4NEB 812 6115-02b

Introduction
System Description
Installation Guidelines
Start-Up and Program Tests
Diagnostics and Troubleshooting
Technical Description
Integral Real-Time Clock (only in the S5-95U)
Communication via SINEC L1 LAN
Module Spectrum
Addressing and Access to I/Os
Introduction to STEP 5
STEP 5 Operations
Integrated Blocks and Their Functions
Onboard Interrupt Inputs
Onboard Counter Inputs
Analog Value Processing
Function Modules
Index
1
2
3
4
5
6
7
8
9
10
11
12
14
13
15
A/B/C/
D/E/F
16
Appendices
EWA 4NEB 812 6115-02b

EWA 4NEB 812 6115-02b

S5-90U/S5-95U Contents
Contents
Page
How to Use This System Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xv
1 System Description
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
2 Technical Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 - 1
2.1 Programmable Controller Design - without External I/Os . . . . . . . . . . . . 2 - 1
2.1.1 Design of the S5-90U . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 - 1
2.1.2 Design of the S5-95U . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 - 3
2.2 Internal Electrical Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 - 5
2.2.1 Internal Electrical Configuration of the S5-90U . . . . . . . . . . . . . . . . . . . 2 - 5
2.2.2 Internal Electrical Configuration of the S5-95U . . . . . . . . . . . . . . . . . . . 2 - 6
2.3 Principle of Operation of the PLCs . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 - 7
2.3.1 Functional Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 - 7
2.3.2 Peculiarities of the PLCs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 - 10
3 A Installation Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 - 1
3.1 Mounting the PLC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 - 1
3.2 Mounting the PLCs with External I/Os . . . . . . . . . . . . . . . . . . . . . . . . . 3 - 5
3.2.1 Mounting the S5-90U with External I/Os . . . . . . . . . . . . . . . . . . . . . . . 3 - 5
3.2.2 Mounting the S5-95U with External I/Os . . . . . . . . . . . . . . . . . . . . . . . 3 - 7
3.2.3 How to Plug External I/O Modules into the Bus Units . . . . . . . . . . . . . . 3 - 9
3.2.4 Multi-Tier Expansion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 - 11
3.2.5 Cabinet Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 - 13
3.3 Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 - 15
3.3.1 Connection Methods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 - 15
3.3.2 Connecting the Power Supply to the S5-90U . . . . . . . . . . . . . . . . . . . . 3 - 19
3.3.3 Connecting the Power Supply to the S5-95U . . . . . . . . . . . . . . . . . . . . 3 - 19
3.3.4 Connecting the Onboard I/Os of the S5-90U . . . . . . . . . . . . . . . . . . . . 3 - 20
3.3.5 Connecting the Onboard I/Os of the S5-95U . . . . . . . . . . . . . . . . . . . . 3 - 22
3.3.6 Connecting External I/Os . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 - 24
3.4 Electrical Configuration with External I/Os . . . . . . . . . . . . . . . . . . . . . . 3 - 25
3.4.1 Electrical Configuration of the S5-90U with External I/Os . . . . . . . . . . . . 3 - 25
3.4.2 Electrical Configuration of the S5-95U with External I/Os . . . . . . . . . . . . 3 - 27
3.4.3 Connecting Non-Floating and Floating Modules . . . . . . . . . . . . . . . . . . 3 - 30
EWA 4NEB 812 6115-02b v

Contents S5-90U/S5-95U
Page
3.5 Wiring Arrangement, Shielding and Measures against
Electromagnetic Interference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 - 33
3.5.1 Running Cables Inside and Outside a Cabinet . . . . . . . . . . . . . . . . . . . 3 - 33
3.5.2 Running Cables Outside Buildings . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 - 34
3.5.3 Equipotential Bonding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 - 35
3.5.4 Shielding Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 - 36
3.5.5 Special Measures for Interference-Free Operations . . . . . . . . . . . . . . . 3 - 37
4 Start-Up and Programmer Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 - 1
4.1 Operating Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 - 1
4.1.1 Programmable Controller Operator Panel . . . . . . . . . . . . . . . . . . . . . . . 4 - 1
4.1.2 Operating Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 - 2
4.1.3 Performing an Overall Reset of the Programmable Controller . . . . . . . . 4 - 3
4.2 Starting Up a System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 - 4
4.2.1 Suggestions for Configuring and Installing the
Programmable Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 - 4
4.2.2 Steps for Starting Up the Programmable Controller . . . . . . . . . . . . . . . 4 - 5
4.3 Loading the Program into the PLC . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 - 8
4.3.1 Loading the Program Automatically . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 - 8
4.3.2 Loading the Program Manually . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 - 9
4.4 Saving a Program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 - 10
4.4.1 Saving a Program to a Memory Submodule . . . . . . . . . . . . . . . . . . . . . 4 - 10
4.4.2 Function of the Back-Up Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 - 11
4.5 Programmer Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 - 11
4.5.1 Overview of Programmer Functions . . . . . . . . . . . . . . . . . . . . . . . . . . 4 - 12
4.5.2 Peculiarities of the Programmer Functions for the
S5-90U and S5-95U . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 - 13
4.5.3 Performance Characteristics When Using the
Programmer Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 - 13
5 Diagnostics and Trouble Shooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 - 1
5.1 Diagnostic Byte . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 - 1
5.2 LED Error Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 - 3
5.3 Interrupt Analysis Using the Programmer . . . . . . . . . . . . . . . . . . . . . . . 5 - 4
5.3.1 ”ISTACK” Analysis Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 - 4
5.3.2 Meanings of the ISTACK Displays for Errors Occurring
During Restart and Program Execution . . . . . . . . . . . . . . . . . . . . . . . . 5 - 7
5.3.3 Meanings of the ISTACK Displays in the Case of Errors
During Copying the Program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 - 8
vi EWA 4NEB 812 6115-02b

S5-90U/S5-95U Contents
Page
5.4 Program Errors 5 - 9
5.4.1 Determining an Error Address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 - 9
5.4.2 Program Tracing with the ”BSTACK” Function . . . . . . . . . . . . . . . . . . 5 - 10
5.5 Faults in the External I/Os . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 - 12
5.6 System Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 - 13
5.7 The PLC does not Enter the ”RUN” Mode . . . . . . . . . . . . . . . . . . . . . 5 - 13
6 Addressing and Access to I/Os . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 - 1
6.1 Addressing the Onboard I/Os . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 - 1
6.2 Addressing the External I/Os . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 - 2
6.2.1 Slot Numbering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 - 2
6.2.2 Digital Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 - 5
6.2.3 Analog Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 - 7
6.2.4 Function Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 - 8
6.3 Process Image and Access to I/Os . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 - 9
6.3.1 Access to I/Os During Cyclic Program Execution . . . . . . . . . . . . . . . . . 6 - 11
6.3.2 Access to I/Os During Time-Controlled Program Execution
(for S5-95U only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 - 13
6.4 Calculating the Scan Time and Response Time . . . . . . . . . . . . . . . . . . 6 - 15
6.5 Start-Up with/without External I/Os and Parameterization
of Internal Timers (S5-95U only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 - 23
7 Introduction to STEP 5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 - 1
7.1 Writing a Program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 - 1
7.1.1 Methods of Representation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 - 1
7.1.2 Operand Areas . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 - 2
7.2 Program Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 - 3
7.2.1 Linear Programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 - 3
7.2.2 Structured Programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 - 4
EWA 4NEB 812 6115-02b vii

Contents S5-90U/S5-95U
Page
7.3 Block Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 - 6
7.3.1 Organization Blocks (OBs) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 - 8
7.3.2 Program Blocks (PBs) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 - 10
7.3.3 Sequence Blocks (SBs; only for S5-95U) . . . . . . . . . . . . . . . . . . . . . . 7 - 10
7.3.4 Function Blocks (FBs) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 - 10
7.3.5 Data Blocks (DBs) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 - 15
7.4 Processing Blocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 - 17
7.4.1 Changing Programs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 - 17
7.4.2 Changing Blocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 - 17
7.4.3 Compressing the Program Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 - 17
7.5 Number Representation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 - 18
8 STEP 5 Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 - 1
8.1 Basic Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 - 1
8.1.1 Boolean Logic Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 - 2
8.1.2 Set/Reset Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 - 7
8.1.3 Load and Transfer Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 - 10
8.1.4 Timer Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 - 15
8.1.5 Counter Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 - 25
8.1.6 Comparison Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 - 30
8.1.7 Arithmetic Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 - 31
8.1.8 Block Call Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 - 33
8.1.9 Other Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 - 38
8.2 Supplementary Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 - 39
8.2.1 Load Operation (only for the S5-95U) . . . . . . . . . . . . . . . . . . . . . . . . . 8 - 40
8.2.2 Enable Operation (only for the S5-95U) . . . . . . . . . . . . . . . . . . . . . . . . 8 - 41
8.2.3 Bit Test Operations (only for the S5-95U) . . . . . . . . . . . . . . . . . . . . . . 8 - 42
8.2.4 Digital Logic Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 - 44
8.2.5 Shift Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 - 48
8.2.6 Conversion Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 - 50
8.2.7 Decrement/Increment (only for the S5-95U) . . . . . . . . . . . . . . . . . . . . 8 - 52
8.2.8 Disable/Enable Interrupt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 - 53
8.2.9 DO Operation ( only for the S5-95U) . . . . . . . . . . . . . . . . . . . . . . . . . . 8 - 54
8.2.10 Jump Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 - 56
8.2.11 Substitution Operations (only for the S5-95U) . . . . . . . . . . . . . . . . . . . 8 - 58
8.3 System Operations (only for the S5-95U) . . . . . . . . . . . . . . . . . . . . . . 8 - 64
8.3.1 Set Operations (only for the S5-95U) . . . . . . . . . . . . . . . . . . . . . . . . . 8 - 64
8.3.2 Load and Transfer Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 - 64
8.3.3 Arithmetic Operation (only for the S5-95U) . . . . . . . . . . . . . . . . . . . . . 8 - 67
8.3.4 Other Operations (only for the S5-95U) . . . . . . . . . . . . . . . . . . . . . . . 8 - 68
viii EWA 4NEB 812 6115-02b