Representation of the Analog Values | Siemens CP 243-2 specification

Access to the Data of the AS-i Slaves

Representation of the Analog Values

The analog values must be interpreted complying with slave profile 7.3 or 7.4 as 16-bit values in two's complement.

For further information about the range of values, measuring range, accuracy etc., refer to the relevant documentation of the analog slaves.

Special Situations

In the input direction, the CP 243-2 supplies the value 7FFFH when,

Sthe AS-i slave does not exist, has failed, or is not an analog slave complying with profile 7.3 or 7.4;

Sthe channel number is not supported by the slave;

SThe slave signals ªValue Invalidº.

In the input direction, the CP 243-2 supplies the value 0000H when the AS-i slave supplies transparent data complying with profile 7.3 (extended ID2 code, bit 2=1) and when

Sthis slave has failed

Sthis slave signals ªValue Invalidº.

In the output direction, the CP 243-2 behaves as follows:

In the STOP mode of the PLC (more exactly: bit PLC_RUN = 0), the CP 243-2 stops transfer of the analog values. The reaction of the analog slave depends on the particular manufacturer.

When the CP 243-2 starts up, all analog values have the default 7FFFH. This value is, however, only sent after the bit PLC_RUN changes from ª0º to ª1º.

Caution

!To ensure the consistency of the analog values, the CP 243-2 does not update the analog input and analog output values as long as the bank select bit BS5 = 1.

Immediately after a read or write access to the analog values it is best to set all bank select bits to ª0º.

3-14	SIMATIC NET CP 243-2 AS-i Master
	C79000-G8976-C142/02

Image 62

Siemens CP 243-2 installation instructions Representation of the Analog Values, Special Situations

Contents

Appendix AS-Interface MasterManual 07/2000 C79000-G8976-C142 Release Correct Usage Safety GuidelinesQualified Personnel Trademarks Purpose of the Manual We recommend the following procedure whenPreface Requirements Preface Contents Dealing with Problems / Error Displays Signaling Errors and Diagnostics in the User ProgramCommand Interface Glossary Index References Simatic NET ± Support and Training Contents Technical Description and Installation Instructions General Notes on Operation ± Safety Warnings AS-i Uses of the ModuleDP Slave and AS-i Master Master Components Supplied Explanation/Values Technical Specifications of the ModuleFeature Possible Restrictions Installing the ModuleSlots in the S7-200 Front Panel ± Access to all Functions Connection, Display and Control Elements Connections to the AS-i Cable Terminal BlockConnections Technical Description and Installation Instructions Extended Operation Modes of the CPStandard Operation Meaning of the LEDs Displays and Operator ControlsChanging the Display Status ± Display Button SET Button LED color Status DisplayInterpreting the Status Display Status LED color Status SF red System error Meaning Interpreting the Slave Display Status Characteristics of the Slave DisplaySlave Display Display Statuses in Detail Example of a Slave Display Example of a Slave Display Protected Mode Configuring the AS-Interface with the SET ButtonConfiguration Mode Interpreting the Display Status Preparing to Configure Configuring Technical Description and Installation Instructions Interface to the User Program S7-200 CPU S7-200 CPU OverviewCP 243-2 as Expansion Module in the S7-200 Digital Module Analog Module Examples Addressing the CP 243-2 in the S7-200 CPUAddress Areas CPU Example of a CPU 224, a CP 243-2 and a CP CPU 14 DI 10 do CPU 14DI 10 do Module Meaning of the Data in the Digital Module Overview Range of Values Identification Register in the Digital ModuleMeaning Example Meaning for the User Program Error Register in the Digital ModuleExample of Access to the Error Register Description of the Bits Status Byte Input Register 8DIStructure of the Status Byte Bit Value Bit Control Byte Output Register 8DOStructure of the Control Byte Value Meaning Meaning of the Data in the Analog Module Digital module 8DI/8DO Identification Register in the Analog Module Bit Description/Range of Values Error Register in the Analog ModuleStructure of the Error Register Example of Access to the Error Register Principle Access to the Analog Input and Output WordsAccess in the User Program Advantage Interface to the User Program in the S7-200 CPU S7-200 CPU Analog Input AreaAssignment of the Input Areas Banks 16±30 Reserved area Bank 1 Diagnostics on the AS-InterfaceBanks 2±15 Response data on the AS-Interface Bank 31 Binary input data of the AS-i slaves 1B ± 31B Banks 32±47 Analog input data of the AS-i slaves Banks 48±63 Reserved area Bank 1 reserved Analog Output AreaAssignment of the Output Areas Banks 32±47 Analog output data of the AS-i slaves Banks 2±15 Command data on the AS-InterfaceBank 31 Binary output data of the AS-i slaves 1B ± 31B Access to the Data of the AS-i Slaves Access to the Binary Values Bank Byte no Bit 7±4 Bit 3±0 Reserved Slave 1B Data Exchange in the Stop Mode of the S7-22x CPU Special Feature of Analog Slaves AS-i slaves Output byte Access to the AS-i User Data Data Access with Micro Bank Byte no Meaning Access to the Analog ValuesAssignment of the AS-i Analog Data 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 Representation of the Analog Values Special Situations Access to the AS-i Analog Data SBR 4 STL Access to the Data of the AS-i Slaves Signaling Errors and Diagnostics User Program Signaling Error Signaling Example Reading the Delta List STL Example Signaling Errors and Diagnostics in the User Program Command Interface Command interface of the CP Command Buffer and Response Buffer Command Sequence AS-i master User program Reaction to command Example SBR 3 STL Q1.0 Select bank AIW0, VW512 Parameter Description of the AS-i CommandsName Return LPF General Structure of the Command Buffer Bank Byte Meaning / Content General Structure of the Response Buffer Bank Byte Command Status General Structure of the AS-i Slave Address Bit Slave address Structure of the Job Data in the Send Buffer SetPermanentParameterPurpose Structure of the Job Data in the Receive Buffer GetPermanentParameter Purpose of the Command WriteParameter ReadParameter StoreActualParameters Extended ID2 code SetExtendedPermanentConfigurationID code GetExtendedPermanentConfiguration StoreActualConfiguration GetExtendedActualConfiguration SetExtendedLPS Reserved Mode SetOfflineMode SelectAutoprogramming SetOperationMode ChangeAS-iSlaveAddress Read error in non-volatile memory Parity error detected Error detectedEnd bit error detected GetAS-iSlaveStatus Reserved GetLPS, GetLAS, GetLDS, GetFlags Flag Bit Number Meaning 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 ReadVersionID Purpose ReadAS-iSlaveID Reserved ID code ReadAS-iSlaveID1 Reserved Extended ID1 code WriteAS-iSlaveExtendedID1 Irrelevant Extended ID1 code ReadAS-iSlaveID2 Reserved Slave ID2 Reserved Configuration ReadAS-iSlaveI/O GetLPF WriteAS-iSlaveParameterString ReadAS-iSlaveParameterString Byte Meaning ReadAS-iSlaveIDString ReadAS-iSlaveDiagnosticString Structure of the Response Buffer Structure of the Command BufferReadDataandDeltaList Delta Slave Reserv Slave 7B Slave 6B Command Interface Dealing with Problems / Error Displays You can now replace the defective slave as follows Simple Replacement of AS-Interface SlavesDetecting Defective AS-Interface Slaves Possible Cause Remedy Error Displays of the CP 243-2 / Remedying ErrorsError Error Possible Cause Remedy Dealing with Problems / Error Displays Dealing with Problems / Error Displays Comment / Function implemented by / Section Pics for the CPList of Master Functions Available AS-Interface Protocol Implementation Function or Call on the Host Interface Idcod AS-Interface Protocol Implementation References Simatic S7-200 Order numbers References EU Directive EMC 89/336/EEC Installation InstructionsProduct Name Area of Application Simatic NET CP 243-2 AS-i Master C79000-G8976-C142/02 Simatic Customer Support Hotline Simatic NET ± Support and TrainingSimatic Training Center Nuremberg Johnson City Singapore Simatic Basic Hotline Simatic Premium Hotline Simatic Customer Support Online ServicesFurther Support Glossary AS-i standard slave AS-i moduleAS-i slave Extended AS-i master Nibble Standard AS-i master Glossary-4 Index PICS, A-1