Control Byte Output Register 8DO, Bit | Siemens CP 243-2 specification

Interface to the User Program in the S7-200 CPU

2.3.4Control Byte (Output Register 8DO)

Meaning for the User Program

The user program controls the data exchange with the CP 243-2 using this register.

Structure of the Control Byte

Bit 7	Bit 6

PLC_RUN ASI_COM

Bit 5

BS5

Bit 4

BS4

Bit 3

BS3

Bit 2

BS2

Bit 1

BS1

Bit 0

BS0

Description of the Bits

Table 2-2

Bit

BS0..BS5

ASI_COM

PLC_RUN

Value	Meaning

0 ... 63	Bank select bits for changing the bank in the analog module
dec.	(see Section 2.5).

0/1	Job bit for the AS-i command interface (see Section 5.1).

In the STOP mode of the S7-200 CPU, the CP must send defined values to all AS-i slaves (see Chapter 3). Since the AS-i slave data are transferred via the analog area and the S7-200 CPU does not set this area to '0' when it changes from RUN to STOP, the CPU mode must be signaled to the CP 243-2 using the PLC_RUN bit as follows:

0Signal to the CP 243-2 that the S7-200 CPU is in the STOP mode.

The CP 243-2 sends '0' to all AS-i binary slaves. The analog value transfer to analog output slaves is interrupted. The

S7-200 CPU sets the bit automatically to ª0º at a change from RUN to STOP.

1Signals to the CP 243-2 that the S7-200 CPU is in the RUN mode.

The CP 243-2 sends the content of output bank 0 to all AS-i slaves (see Section 2.4). The user program must set this bit to ª1º during startup (first scan).

Do not set the PLC_RUN bit permanently to ª1º with the S7-200 operating system functions such as ªCPU configuration/setting the outputsº or ªforce outputsº.

SIMATIC NET CP 243-2 AS-i Master	2-11
C79000-G8976-C142/02

Image 37

Siemens CP 243-2 Control Byte Output Register 8DO, Structure of the Control Byte, Bit, Value Meaning

Contents

Manual AS-Interface MasterAppendix 07/2000 C79000-G8976-C142 Release Qualified Personnel Safety GuidelinesCorrect Usage Trademarks Preface We recommend the following procedure whenPurpose of the Manual Requirements Preface Contents Command Interface Signaling Errors and Diagnostics in the User ProgramDealing with Problems / Error Displays References Simatic NET ± Support and Training Glossary Index Contents Technical Description and Installation Instructions General Notes on Operation ± Safety Warnings DP Slave and AS-i Master Uses of the ModuleAS-i Master Components Supplied Feature Technical Specifications of the ModuleExplanation/Values Slots in the S7-200 Installing the ModulePossible Restrictions Connection, Display and Control Elements Front Panel ± Access to all Functions Connections Terminal BlockConnections to the AS-i Cable Technical Description and Installation Instructions Standard Operation Modes of the CPExtended Operation Changing the Display Status ± Display Button Displays and Operator ControlsMeaning of the LEDs SET Button Interpreting the Status Display Status DisplayLED color Status LED color Status SF red System error Meaning Slave Display Characteristics of the Slave DisplayInterpreting the Slave Display Status Display Statuses in Detail Example of a Slave Display Example of a Slave Display Configuration Mode Configuring the AS-Interface with the SET ButtonProtected Mode Interpreting the Display Status Configuring Preparing to Configure Technical Description and Installation Instructions Interface to the User Program S7-200 CPU CP 243-2 as Expansion Module in the S7-200 OverviewS7-200 CPU Digital Module Analog Module Address Areas Addressing the CP 243-2 in the S7-200 CPUExamples CPU CPU 14 DI 10 do Example of a CPU 224, a CP 243-2 and a CP Module CPU 14DI 10 do Overview Meaning of the Data in the Digital Module Meaning Identification Register in the Digital ModuleRange of Values Example Example of Access to the Error Register Error Register in the Digital ModuleMeaning for the User Program Structure of the Status Byte Status Byte Input Register 8DIDescription of the Bits Bit Value Structure of the Control Byte Control Byte Output Register 8DOBit Value Meaning Digital module 8DI/8DO Meaning of the Data in the Analog Module Identification Register in the Analog Module Structure of the Error Register Error Register in the Analog ModuleBit Description/Range of Values Example of Access to the Error Register Access in the User Program Access to the Analog Input and Output WordsPrinciple Advantage Interface to the User Program in the S7-200 CPU Assignment of the Input Areas Analog Input AreaS7-200 CPU Banks 2±15 Response data on the AS-Interface Bank 1 Diagnostics on the AS-InterfaceBanks 16±30 Reserved area Bank 31 Binary input data of the AS-i slaves 1B ± 31B Banks 48±63 Reserved area Banks 32±47 Analog input data of the AS-i slaves Assignment of the Output Areas Analog Output AreaBank 1 reserved Bank 31 Binary output data of the AS-i slaves 1B ± 31B Banks 2±15 Command data on the AS-InterfaceBanks 32±47 Analog output data of the AS-i slaves Access to the Data of the AS-i Slaves Access to the Binary Values Bit 7±4 Bit 3±0 Bank Byte no Reserved Slave 1B Special Feature of Analog Slaves Data Exchange in the Stop Mode of the S7-22x CPU Output byte AS-i slaves Data Access with Micro Access to the AS-i User Data Assignment of the AS-i Analog Data Access to the Analog ValuesBank Byte no Meaning Simatic NET CP 243-2 AS-i Master C79000-G8976-C142/02 Access to the Data of the AS-i Slaves Access to the Data of the AS-i Slaves Access to the Data of the AS-i Slaves Access to the Data of the AS-i Slaves Special Situations Representation of the Analog Values SBR 4 STL Access to the AS-i Analog Data Access to the Data of the AS-i Slaves Signaling Errors and Diagnostics User Program Error Signaling Signaling STL Example Example Reading the Delta List Signaling Errors and Diagnostics in the User Program Command Interface Command Buffer and Response Buffer Command interface of the CP AS-i master User program Reaction to command Command Sequence SBR 3 STL Example Q1.0 Select bank AIW0, VW512 Name Description of the AS-i CommandsParameter Return LPF Bank Byte Meaning / Content General Structure of the Command Buffer Bank Byte General Structure of the Response Buffer Command Status Bit Slave address General Structure of the AS-i Slave Address Purpose SetPermanentParameterStructure of the Job Data in the Send Buffer Structure of the Job Data in the Receive Buffer GetPermanentParameter WriteParameter Purpose of the Command ReadParameter StoreActualParameters ID code SetExtendedPermanentConfigurationExtended ID2 code GetExtendedPermanentConfiguration StoreActualConfiguration GetExtendedActualConfiguration SetExtendedLPS SetOfflineMode Reserved Mode SelectAutoprogramming SetOperationMode ChangeAS-iSlaveAddress End bit error detected Parity error detected Error detectedRead error in non-volatile memory GetAS-iSlaveStatus Reserved GetLPS, GetLAS, GetLDS, GetFlags Bit Number Meaning Flag Meaning of the Flags GetExtendedTotalConfiguration Idcode slave Ext ID1 slave Command Interface Command Interface Reserved Parameter slave 1B StoreExtendedTotalConfiguration Idcode slave Ext ID1 Slave Configuration slave Ext ID2 slave Command Interface Command Interface Configmode Autoaddrenable Echo of the command number 3A H Command status WriteExtendedParameterList Echo of the command number 3C H Command status ReadExtendedParameterEchoList Command Interface Purpose ReadVersionID Reserved ID code ReadAS-iSlaveID Reserved Extended ID1 code ReadAS-iSlaveID1 Irrelevant Extended ID1 code WriteAS-iSlaveExtendedID1 Reserved Slave ID2 ReadAS-iSlaveID2 ReadAS-iSlaveI/O Reserved Configuration GetLPF WriteAS-iSlaveParameterString Byte Meaning ReadAS-iSlaveParameterString ReadAS-iSlaveIDString ReadAS-iSlaveDiagnosticString ReadDataandDeltaList Structure of the Command BufferStructure of the Response Buffer Delta Slave Reserv Slave 7B Slave 6B Command Interface Dealing with Problems / Error Displays Detecting Defective AS-Interface Slaves Simple Replacement of AS-Interface SlavesYou can now replace the defective slave as follows Error Error Displays of the CP 243-2 / Remedying ErrorsPossible Cause Remedy Error Possible Cause Remedy Dealing with Problems / Error Displays Dealing with Problems / Error Displays List of Master Functions Available Pics for the CPComment / Function implemented by / Section Function or Call on the Host Interface AS-Interface Protocol Implementation Idcod AS-Interface Protocol Implementation Simatic S7-200 References References Order numbers Product Name Installation InstructionsEU Directive EMC 89/336/EEC Area of Application Simatic NET CP 243-2 AS-i Master C79000-G8976-C142/02 Simatic Training Center Simatic NET ± Support and TrainingSimatic Customer Support Hotline Nuremberg Johnson City Singapore Simatic Basic Hotline Further Support Simatic Customer Support Online ServicesSimatic Premium Hotline Glossary AS-i slave AS-i moduleAS-i standard slave Extended AS-i master Standard AS-i master Nibble Glossary-4 Index PICS, A-1