Siemens CB15 User manual

CB15/CB155

PROFIBUS Module

PROFIBUS MODULE (CB15/CB155) English

Operating Instructions

Contents

Warning and Caution Notes

1.OVERVIEW

1.1 Description and Features

1.2 Application on a PROFIBUS Link

2.INSTALLATION

2.1 Installing the Module

2.1.1 CB15 Installation

2.1.2 CB155 Installation

2.2 Connecting the Bus Cable

2.2.1 Terminals

2.2.1.1 CB15 Terminals

2.2.1.2 CB155 Terminals

2.2.2 Bus Cabling

2.3 EMC Measures

2.3.1 Shielding

2.3.2 Equipotential Bonding

2.3.3 Cable Installation

2.4 PROFIBUS-DP Bus Termination

2.5 Front Panel

3.OPERATING INFORMATION

3.1 Local Control

3.2 Remote Control

3.3 System Parameters

3.3.1 Parameters not Available via the CB15/CB155

3.3.2 Parameters Specific to the CB15/CB155

3.3.3 Hex Display for PROFIBUS on CB15

4.FAULT CODES

5.COMMISSIONING

5.1 Data Communication via PROFIBUS-DP

5.1.1 Parameter Area (PKW)

5.1.2 Process Data Area (PZD)

5.1.2.1 Control Word (STW)

5.1.2.2 Status Word (ZSW)

5.1.2.3 Main Setpoint (HSW)

5.1.2.4 Main Actual Value (HIW)

5.1.3 Watchdog Timeout

5.2 Settings on the PROFIBUS-DP Master

5.2.1 Setting the PPO Type from the Master

5.2.2 Setting the PPO Type on the CB15/CB155

5.3 Initial Communication with the CB15/CB155

6.PROFIBUS TROUBLESHOOTING

6.1 Diagnostic Parameters

6.2 Diagnostics with a Class 2 Master

PROFIBUS MODULE (CB15/CB155) English

Operating Instructions

Figures

1 User Data Structure in the PROFIBUS-DP Message Frame

2 Structure of the User Data in the PROFIBUS-DP Message Frame

3 Parameter Process Data Object (PPO Types)

4 Structure of the Parameter Area

5 Parameter Identifier Example

6 Parameter Value Example

7 Watchdog Function

PROFIBUS MODULE (CB15/CB155) English

Operating Instructions

Warning and Caution Notes

Hazardous voltages are present in this electrical equipment during operation.

Non-observance of the safety instructions can result in severe personal injury or death.

Only qualified personnel should work on or around this equipment after becoming thoroughly familiar

with all warnings, safety notices and maintenance procedures contained herein.

The successful and safe operation of this equipment is dependent on proper handling, installation,

operation and maintenance.

WARNING

Definitions

- Qualified Person

For the purposes of this manual and product labels, a qualified person is one who is familiar with the installation,

construction, operation and maintenance of this equipment and with the hazards involved. In addition, the person

must be:

(1) Trained and authorised to energise, de-energise, clear, ground and tag circuits and equipment in

accordance with established safety practices.

(2) Trained in the proper care and use of protective equipment in accordance with established safety

practices.

(3) Trained in rendering first aid.

- DANGER

For the purposes of this manual and product labels, DANGER indicates that loss of life, severe personal injury or

substantial property damage WILL result if proper precautions are not taken.

- WARNING

For the purposes of this manual and product labels, WARNING indicates that loss of life, severe personal injury or

substantial property damage CAN result if proper precautions are not taken.

- CAUTION

For the purposes of this manual and product labels, CAUTION indicates that minor personal injury or property

damage CAN result if proper precautions are not taken.

- Note

For the purposes of this manual and product labels, Notes merely call attention to information that is especially

significant in understanding and operating the drive.

PROFIBUS MODULE (CB15/CB155) English

Operating Instructions

1. OVERVIEW

1.1 Description and Features

The PROFIBUS Module (CB15/CB155) is a device that allows control of an inverter over a PROFIBUS-DP (SINEC

L2-DP) serial bus.

Features

- Retains the ability to access the internal parameter set of the inverter (CB15 only).

- Allows high speed cyclical communication over a PROFIBUS link.

- Ability to control up to 125 inverters using the PROFIBUS-DP protocol.

- Provides open communication conforming to all relevant aspects of DIN19245 Part 3. It may be used with any

other PROFIBUS-DP/SINEC L2-DP peripheral on the serial bus.

- Easy to install.

- Easy to configure with proprietary Siemens COM ET 200 software (parameterisation disc included).

- Output frequency (and hence motor speed) can be controlled by one of five methods:

(1) Digital frequency setpoint.

(2) Analogue setpoint (voltage or current input).

(3) Motor potentiometer.

(4) Fixed frequency.

(5) Remote data transmission via the PROFIBUS link.

The RS485 serial link is not available while the CB15/CB155 is connected to the inverter.

IMPORTANT

1.2 Application on a PROFIBUS Link

PROFIBUS-DP is defined as a draft standard in DIN 19245 Part 3. Data communication with the CB15/CB155

conforms to the specifications in the VDI/VDE 3689 ‘PROFIBUS Profile for Variable Speed Drives’ guideline. This

defines the user data structure through which a master can access the drive slaves. The user data structure is

subdivided into two areas that can be transmitted in each message frame:

Process data, i.e. control words and setpoints, or status information and actual values and

A parameter area for reading/writing parameter values, e.g. for reading out faults or information on the

attributes of a parameter, such as minimum/maximum limits, etc.

The structure of the user data is designated as Parameter Process data Objects (PPO) in the PROFIBUS variable

speed drives profile (VDI/VDE guideline 3689). There are five PPO types: user data with no parameter area with

two words or six words of process data, or user data with a parameter area and two, six or ten words of process

data.

The CB15/CB155 only supports PPO types 1 and 3.

PROFIBUS MODULE (CB15/CB155) English

Operating Instructions

During installation of the network you can configure on the master which PPO type is used to address the inverter

from the PROFIBUS-DP master. The choice of PPO type depends on the task of the drive within the automation

network. The process data is always transmitted. It is processed with the highest priority in the shortest time slices.

The process data is used for open-loop control of the drive in the automation network, e.g. switching on/off,

specifying setpoints, etc.

The parameter area provides the user with free access on the network to all the parameters located on the inverter,

e.g. for reading out detailed diagnostics information, fault messages, etc. This enables further information to be

called up on a higher-level system, such as a PC, for visualisation of the drive, without affecting the performance

capabilities of process data communication.

Control and operation of the CB15/CB155 via PROFIBUS-DP

All information required for the open-loop control of a variable speed drive in the network environment of an

industrial process is transmitted in the process data area

(see Figure 1)

. Control information (control words) and

setpoints are transmitted from the PROFIBUS-DP master to the inverter. Information on the status of the inverter

(status words) and actual values is transmitted in the opposite direction.

Figure 1: User Data Structure in the PROFIBUS-DP Message Frame

P a r a m e t e r s

Parameters (PKW) Process Data (PZD)

Protocol Frame

(Header) Protocol Frame

(Trailer)

The communication component of the interface board stores the received process data in the order in which it was

transmitted in the message frame. Each word in the frame is assigned a fixed function.

The CB15/CB155 supports the PROFIBUS-DP control commands FREEZE and SYNC.

A diagnostics parameter can be used to read detailed diagnostics information straight from the diagnostics memory

of the CB15/CB155.

PROFIBUS MODULE (CB15/CB155) English

Operating Instructions

2. INSTALLATION

Incorrect operation of the serial bus system can lead to an inverter being switched on inadvertently.

Commissioning work must only be carried out by personnel who are qualified in installing such

systems. Additionally, the guidelines associated with the installation of the inverter itself must be

followed (see section 2 of the inverter’s handbook).

WARNING

2.1 Installing the Module

The inverter must be switched off before the CB15/155 is either connected or disconnected. The CB15/CB155 is

powered directly from the inverter and therefore needs no additional external supply

2.1.1 CB15 Installation

Fix the CB15 to the front of the inverter by mating the D-type connectors together and then securing in position by

pressing the module onto the inverter.

2.1.2 CB155 Installation

Before connecting the CB155 to the inverter, it is necessary to set the following parameters to the correct values,

using the OPM2.

Fix the CB155 to the side of the inverter housing using the screws provided. Connect the CB155 to SK200 on the

inverter, using the supplied cable.

PROFIBUS MODULE (CB15/CB155) English

Operating Instructions

COMBIMASTER

CB155

T CONNECTOR

COMBIMASTER

CB155

T CONNECTOR

COMBIMASTER

CB155

T CONNECTOR

TERMINATOR

BUS MASTER

INTERCONNECTING CABLES - One or

more cables joined by cable links.

Diagram showing typical PROFIBUS installation using CB155 and COMBIMASTER

2.2 Connecting the Bus Cable

2.2.1 Terminals

2.2.1.1 CB15 Terminals

The PROFIBUS connection must be made using the D-type socket on the front of the CB15. Connections to this

socket are as follows:

Pin 3PROFIBUS Pconnection

Pin 8PROFIBUS Nconnection

Additionally, the cable shield should be connected to the shell of the D-type connector, which is connected to

protective earth via the CB15 and inverter. The connector must be screwed securely to the CB15 to ensure both

mechanical strength and earth continuity.

Note

As the stations must be ‘daisy-chained’ together (except for the stations at either end of the bus), there

must be two cables into the D-type connector - one from the previous station and one to the next station.

This bus topology means that a station may be disconnected from the bus or powered down while still connected

without affecting bus operation.

PROFIBUS MODULE (CB15/CB155) English

Operating Instructions

2.2.1.2 CB155 Terminals

The PROFIBUS connection will normally be made using the optional T connector 6SE9996-0XA21 ). This is

connected to the free connector on the side of the CB155, and is in turn screwed to the front of the CB155, thus

providing the PROFIBUS IN and OUT connections. See Diagram above.

Socket (Pins) Plug (Holes)

Pin Arrangement for the 5-way circular PROFIBUS Connector

Note that the socket is used on the PROFIBUS module, and the gender adapters. The plug is used on the

interconnecting cables.

Terminal Function, information

1 +5V

2 N (-)

30V

4 P (+)

5 no connection

2.2.2 Bus Cabling

Transmission Rate (Kbits/s) Max. Length of Cable in a Segment (m)

9,6 1200

19,2 1200

93,75 1200

187,5 1000

500 400

1500 200

12000 100

A segment can be expanded using RS485 repeaters. The SINEC L2 RS485 repeater (order no. 6GK1510-0AC00)

is recommended.

PROFIBUS MODULE (CB15/CB155) English

Operating Instructions

2.3 EMC Measures

The following measures are required for interference-free operation of the PROFIBUS-DP. Additional information

on EMC precautions can be found in the ‘ET 200 Distributed I/O System’ manual.

2.3.1 Shielding

The conductors of the bus cables must be twisted together, shielded and installed separately from the power

cables with a minimum clearance of 20 cm. The shield for the bus cable should be connected to protective earth at

both ends.

For the CB15, this is achieved using the P-clip provided with the module as shown in the enclosed instruction

sheet.

For the CB155, if the specified cables are used, no further action is necessary.

Bus and power cable crossings should be installed at an angle of 90o.

2.3.2 Equipotential Bonding

If the cable shields are earthed at different sections of the system then equipotential bonding cables can be used to

reduce current flow in the screen between the inverters and the PROFIBUS-DP master.

The following equipotential cables are recommended:

16 mm2Cu for equipotential bonding conductors up to 200 m in length

25 mm2Cu for equipotential bonding conductors over 200 m in length

Use a large contact surface connection between the equipotential bonding conductors and the protective ground

conductor.

2.3.3 Cable Installation

Observe the following rules when installing cables:

- Bus cables (signal cables) may not be installed directly adjacent to power cables.

- Signal cables (and equipotential bonding cables) should be connected across the shortest possible path.

- Power cables and signal cables must be installed in separate cable runs.

- Shields should have large contact surface connections.

2.4 PROFIBUS-DP Bus Termination

For interference-free operation of PROFIBUS-DP, the bus cable must be terminated at both ends with bus

terminating resistors. The bus cable from the first PROFIBUS-DP station to the last PROFIBUS-DP station should

be treated as a single bus cable, so that the PROFIBUS-DP should be terminated twice.

The bus terminators must be connected to the first station (e.g. the master) and the last station (slave).

For the CB15, this is achieved by moving the switch mounted on the D-type of the PROFIBUS-DP connector to the

ON position.

For the CB155 this is achieved by fitting the dedicated terminating connector to the free position on the T connector

at the end of the link.

Note

(1) Ensure that you only connect the bus terminator to the first network station and the last network

station.

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