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Additional Services

Master Class 2

Field Device (Slave)

Read Data Set Write Data Set Read Diagnostics with Status or Alarm Information

Initiate Read Data Set Write Data Set Data Transport Abort

Master Class1 and/or Class 2 and/or Slave can be implemented in the same Device

Master Class 1

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7 Bytes Mandatory

Device Specific (Optional)

Up to 244 Bytes

Extended Parameterization

SD LE LEr SD DA SA FC DSAP SSAP DU.. FCS ED

0x68 x x 0x68 x x x 0x3D 0x3E x .. x 0x16

3 Bytes DPV1_Status

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Parameterization (continued) - DPV1_Status

Reserved1=Base for Watchdog calculation: 1ms0=Base for Watchdog calculation: 10ms

1=Slave operated in Fail Safe modeDPV1_Enable

7 0

Octet 8

Reserved

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Parameterization - DPV1_Status (continued)

7 0

Octet 9

Octet 10

1=Application specific behavior for configuration check

Enable alarms (under construction)Reserved

Alarm_Mode (specifies alarm capabilities) (under construction)Reserved

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Additional Services for the Controlling Master (Master Class 1)

Read Data Set (service is module/slot related)

Write Data Set (service is module/slot related)

Definition of Status/Alarm information as part of the PROFIBUS diagnostic

Services are performed in acyclic manner (that means in-between two data exchange cycles)

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Additional Services for the Diagnostic Master (Master Class 2)

Initiate/Abort to establish/end a communication channel/relationship

Read Data Set (service is module/slot related)

Write Data Set (service is module/slot related)

Data Transport (combination of read and write)

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FunctionDP Master DP Slave

Dec. Hex Dec. Hex

MSAC_C1 51 33 51 33

MSAC_C2 50 32 0..48 0..30

ResourceManager

50 32 49 31-

Additional Communication Ports Acyclic Communication:

Master Class 1 - Field Device

Master Class 2 - Field Device

Initiate Master Class 2 Communication

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DP Extended - Device Model

Application Process Instances (API)

Allows definition of multiple applications within the device

Master Class 1 ALWAYS addresses API 0

Addressed API for Master Class 2 is selected with Initiate service

API objects are identified by Slot and Index

Slot 0..254 possible

Recommendation: slot = module

Slot 0 = head module/device itself

Index 0..254 possible

Index identifies data block/set within the module

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DP Extended - Device Model (continued)

Base Module Module 1

8 DO

Module 2

16 DO

Module 3

8 DI

Module 4

2 AI

API 0Slot 0

Index 0

API 0Slot 0

Index 1

API 1Slot 0

Index 2

API 0Slot 4

Index 1

API 2Slot 4

Index 16

API 0Slot 2

Index 4

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Communication Sequence

Initiate (Master Class 2 only) Which SAP to be used?

Read Data v Write Data v Data Transfer Data Transfer is Master Class 2 only

Polling Until data available

Abort (Master Class 2 only) Close communication channel

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6 Bytes Mandatory

Up to 244 Bytes

Startup Sequence - Parameterization

SD LE LEr SD DA SA FC DSAP SSAP DU.. FCS ED

0x68 x x 0x68 x x x 0x3D 0x3E x .. x 0x16

Diagnostic - Device Related Part used for Status/Alarms

Identifier Related (Optional)

Channel Related (Optional)

Device Related (Status/Alarms)

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Startup Sequence - Parameterization Diagnostic (continued) - Alarm Coding

Alarms are under C

onstructio

n

Alarms are under C

onstructio

n

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“00”

Diagnostic (continued) - Coding Status

Octet 1

Data length (including header) - 4 to 63

Up to 59 bytes additional status information

1 (= Status)

Octet 2

Status Type

0-Reserved1-Status Message2-Module Status3..31-Reserved32..126-Manufacturer Specific127-Reserved

Octet 3

Slot Number

Reserved

Octet 4

Status Specifier00=No further differentiation 10=Status disappears01=Status appears 11=Reserved

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Additional Data Types

Integer

Unsigned

Floating Point

Visible String

Octet String

Date

Time of Day

Time Difference

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Additional Data Types (continued) - Configuration Special Format

Code for Data Type

7 0

I/O Data Specification

Header Additional Config Data (Simple or Special Format)

1-Boolean 10-Octet String2-Integer8 11-Date3-Integer16 12-Time of Day4-Integer32 13-Time Difference5-Unsigned8 14-Time of Day6-Unsigned16 15-Time Difference7-Unsigned32 16..31-Reserved8-Floating Point 32..63-User specific9-Visible String 64..255-Reserved

Vendor Specific Data

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Additional Data Types (continued) - Example Special Format

0 1 0 0 0 0 1 01 Byte for Input Data Specification & 2 Bytes Vendor Specific Data follow

1 0 0 0 0 1 0 0 5 Bytes of Input Data with Consistency over whole Length

0 0 0 0 1 0 0 0

0 0 0 0 0 1 0 1

Data Type Floating Point

Data Type Unsigned8

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Application Example

PROFIBUS-PA (31.25 kbaud)

PROFIBUS (up to 12 Mbaud)

x

x

Engineering Tool(Diagnostic Master)

Direct access to field device via DP

Extensions (e.g.to change range of

measurement)