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4 DP Master Mode with a PROFIBUS CP in a SIMATIC S7-300
A−89
S7-CPs for PROFIBUS Configuring and Commissioning
Release 09/2011
C79000−G8976−C181−05
4.3.2 The DP States of the DP Masters
Overview
Communication between the DP master and DP slaves can be divided into four
modes:
OFFLINE
STOP
CLEAR
RUN
Each of these modes is characterized by defined actions between the DP master
and the DP slaves.
Mode Meaning Priority
1)
OFFLINE There is no communication whatsoever between the DP master
and the DP slaves. This is the initial status of the DP master.
If an assignment to a master was saved on the DP slave, this is
cleared when the slave enters the offline mode so that the DP
slave can then have parameters assigned and be configured by
other DP masters.
1
STOP
2)
There is also no communication between the DP master and DP
slaves in this mode.
If an assignment to a master was saved on the DP slave, this is
not cleared when the slave enters the stop mode so that the DP
slave cannot have parameters assigned and be configured by
other DP masters.
2
CLEAR In this mode, the master configures and assigns parameters to all
DP slaves entered in the CP database and activated. Following
this, the cyclic data exchange between the DP master and DP
slaves begins. In the CLEAR mode, the value 0H or configured
substitute values is sent to the slaves with process output or an
empty frame, in other words,. process output is deactivated.
Process inputs remain active.
3
RUN
3)
The cyclic data transfer to the DP slaves takes place in the RUN
mode. This is the productive phase. In this mode, the DP slaves
are addressed one after the other by the DP master. The call
frame contains the current output data and the corresponding
response frame contains the current input data.
4
1
If different modes are requested by the DP system (for example by the CPU or a master class 2), the mode
with the highest priority is adopted (1 = highest; 4 = lowest).
2) N
ote: With newer modules (refer to the information in the manual /2/), the STOP mode is now
the OFFLINE mode.
3) Corresponds to OPERATE in the DP standard.
- SIMATIC NET 1
- S7-CPs for PROFIBUS 1
- Configuring and Commissioning 1
- This manual 5
- Audience 6
- Scope of this Manual 6
- New in this version 7
- Symbols Used in this Manual 10
- Conventions 10
- SIMATIC NET glossary 11
- Contents 12
- Contents − Part B 15
- Stations 16
- 1.1 PROFIBUS 17
- 1.2.1 Type of Communication 18
- S7/C7-300 19
- S7-400/S7-400H 19
- 1) PC only as client 20
- PROFIBUS 23
- PROFIBUS CP 25
- Configuring S7 Connections 26
- Interface) 28
- 1.6 PROFIBUS DP 30
- I/O Systems from Siemens 31
- Network Configuration 32
- FMS Master 34
- 1.6.4 DP Slave Mode 35
- Configuring 36
- Networking in a Multiproject 36
- Variants 37
- Configuration of the System 38
- 2.3 Attaching to PROFIBUS 47
- 2.3.2 Optical Attachment 48
- Direct Optical Attachment 49
- S7−300 Series 50
- S7−400 Series 52
- by configuring in the 55
- Settings 61
- Standard 62
- Universal (default setting) 62
- User-defined 62
- Subnet Attachment 64
- Graphic Overview in NetPro 66
- Overview in Table Form 67
- Addresses Tab 68
- Operating Mode Tab 69
- Field Device Parameter 71
- Multiplex OP Connections / 71
- Communication Variables Tab 72
- Diagnostics Tab 72
- Modifications 76
- Multiple Assignment 76
- Setting Up Connections 76
- Configuring the DP Mode 76
- Type of Interface 77
- 3.4 Additional Functions 79
- SIMATIC S7-300 81
- 4.1 Overview 82
- 4.2 Procedure 83
- Programming 84
- Obtaining the Functions (FCs) 84
- Bus Parameters 86
- Sequence of the Modes 90
- DP Process 91
- Assigning an Address Offset 94
- Configuration Table 95
- Size of the Total Area 95
- To achieve synchronization 98
- To update the data of a 98
- Release 09/2011 100
- C79000−G8976−C181−05 100
- Overview 101
- Reaction Time of the Master 102
- Other Possibilities 102
- Updating DP Data Areas 104
- Functions 104
- Initializing a DP Master 104
- CPU Cycle 104
- DP_CTRL Control job 105
- Examples 106
- DP Modes 107
- Changing DP Modes 107
- User Intervention 108
- Control Job with DP_CTRL 109
- Reading Input/Output Data 110
- Application and Uses 111
- Using FC DP-CTRL 111
- SIMATIC S7−300 112
- 5.1 DP Diagnostic Options 113
- Diagnostic Sequence 114
- Integration in the CPU Cycle 115
- Bit Meaning 116
- 5.3 The DP Station List 117
- Saving the Station List 119
- 5.4 DP Single Diagnostics 120
- Response 122
- Application Program 122
- Saving the Diagnostic Data 122
- Bit No. ExplanationMeaning 124
- Bit No. Meaning Explanation 124
- Mode with an S7-300 System 126
- 6.1 Procedure 127
- Characteristics 128
- Tasks of the PROFIBUS CP 128
- Area of Consistency 128
- Functions (FCs) 130
- 6.2.2 DP Data Area on the CPU 131
- DP buffers in PROFIBUS CP 132
- Initialization 133
- Parameter Assignment 133
- Configuration 133
- Watchdog 134
- Diagnostic Data 134
- 6.2.4 Global Control Jobs 135
- Procedure 136
- Requirements 137
- Basic Data of the DP Slave 142
- Programming the DP Slave Mode 143
- Purpose of the FC 143
- Evaluate the Code Bits 143
- Structure of DPSTATUS 144
- Calling FCs in the CPU Cycle 144
- 6.5 Starting Up a DP Slave 145
- 7.1 Procedure 147
- More than One Subnet 148
- Application 150
- Requirement for Configuration 151
- Priority of the Frames 151
- Amounts of Data 152
- Connections 158
- New Connection 158
- Introduction 162
- Opening the Dialog 162
- General Tab 163
- Routing to Distribute Load 164
- Overview Tab 169
- Programming FDL Connections 174
- Principle 176
- 8 NCM S7 Diagnostics 178
- 8.1 Overview 179
- Mode-Dependent Functions 180
- Installation 181
- Structure 182
- Operation 182
- 8.2.2 General Menu Commands 183
- 8.3 Starting Diagnostics 184
- 8.3.4 Using a Gateway 187
- Case b: Several Gateways 188
- 8.4 Steps in Diagnostics 191
- 9 Firmware Loader 205
- 9.1 Application 206
- 9.2 Loading Firmware 207
- Further information 208
- A Pinout 209
- SIMATIC NET S7−CPs 210
- EMC Directive 211
- Machinery Directive 212
- CSA Certification 214
- FM Approval 214
- C References and Literature 216
- Order Numbers 220
- D Document History 221
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