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WL Com Mnl Cover 11 x 17 1/28/05 1:20 PM Page 1
WL Trip Unit, MODBUS Communication
and Electronic Accessories Application
Guide
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Siemens Energy & Automation, Inc.
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Alpharetta, GA 30005
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WL Low Voltage Power
www.sea.siemens.com/power
Circuit Breaker
© 2005 Siemens Energy & Automation, Inc. All Rights Reserved
Siemens is a registered trademark of Siemens AG. Product names m
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WL Com Mnl Cover 11 x 17 1/25/05 10:04 AM Page 2 Communication-capable Circuit Breakers Communication-capable Circuit Breakers WL Circuit Breaker WL Circuit Breaker Technological Leader Among Circuit Breakers: WL Communication Troubleshooting List Fault Description Solution Ensure that you are using a fully-assigned null modem cable. With a null modem cable, pins 2 and 3, 4 and 6, and 7 and 8 Connection Diagram must be assigned and reversed with respect to each other. Before starting the B
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WL UL 489_Com-section 1 1/25/05 4:14 PM Page 1 Communication-capable Circuit Breaker Introduction and Overview 1 WL Circuit Breaker 2 MODBUS Profile for WL Circuit Breaker 3 Breaker Data Adapter (BDA) Breaker Data Adapter Plus (BDA Plus) 4 WL MODBUS Communication and Electronic Accessories • January 2005
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WL UL 489_Com-section 1 1/25/05 4:14 PM Page 2 Communication-capable Circuit Breakers WL Circuit Breaker Safety Guidelines This manual contains notices which you should observe to ensure your own personal safety, as well as to protect the product and connected equipment. These notices are highlighted in the manual by a warning triangle and are marked as follows according to the level of danger. This equipment contains hazardous voltages. Death, serious personal injury or property damage can r
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WL UL 489_Com-section 1 1/25/05 4:14 PM Page 3 Introduction and Overview 1 Content of the Manual Overview of the Bus Systems Communicating with the Circuit Breaker WL MODBUS Communication and Electronic Accessories • January 2005
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WL UL 489_Com-section 1 1/25/05 4:14 PM Page 4 Introduction and Overview WL Circuit Breaker General Content of the Manual Introduction This manual is aimed at those who want to find out more Chapter 1 contains a short The demand for communications- introduction to communications in capable systems, data transparency about the different applications power distribution systems, and and flexibility in industrial of communications-capable provides an overview of the benefits automation systems i
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WL UL 489_Com-section 1 1/25/05 4:14 PM Page 5 Introduction and Overview WL Circuit Breaker In this way, status information, WL Circuit Breakers—Modular and alarms, trip information and Intelligent setpoints (e.g. overcurrent, phase Thousands of options with just a few unbalance, overvoltage) increase components: That's the WL. A new transparency in power distribution generation of circuit breakers – from systems, enabling these situations 200A to 5000A – with a modular to be dealt with quic
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WL UL 489_Com-section 1 1/25/05 4:14 PM Page 6 Introduction and Overview WL Circuit Breaker Communication Bus Systems MODBUS The data can either be transmitted in Communication bus systems ASCII or as a package in RTU format. are used to connect distribution MODBUS is an open, serial MODBUS can be used over a wide communications protocol based on a devices with varying levels of range of transmission media, master-slave architecture. Since it is intelligence. With their normally, on an RS 485
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WL UL 489_Com-section 1 1/25/05 4:14 PM Page 7 Introduction and Overview WL Circuit Breaker Communication Structure of the Starting at the lowest level with WL Circuit Breakers simple configuration of the circuit breakers, to the field level with The following diagram: a PLC and WinPM.Net software • Provides an overview of the tool, to a connection to the different communication options Intranet/Internet, the potential for available with WL Circuit Breakers saving on power costs by means
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WL UL 489_Com-section 1 1/25/05 4:14 PM Page 8 Introduction and Overview WL Circuit Breaker Ethernet If the sender detects that its data is corrupt, another sender must have The Industrial Ethernet is a high- already started sending data. In this performance network that conforms case, both senders abort their to IEE 802.3 (ETHERNET). The highly respective send operations. successful 10Mbit/s technology, which has been used for over a After a random time has elapsed, decade, and the new 100M
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WL UL 489_Com-section 2 1/28/05 1:09 PM Page 1 WL Circuit Breaker Short description of WL Circuit Breaker The CubicleBUS 2 Communication Function of the Trip Units The COM16 MODBUS Module Metering and Metering Plus Description of Important Functions/Parameters for Communication External CubicleBUS Modules External Power Consumption of a WL Circuit Breaker with CubicleBUS WL MODBUS Communication and Electronic Accessories • January 2005
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WL UL 489_Com-section 2 1/28/05 1:09 PM Page 2 Communication-capable Circuit Breakers WL Circuit Breaker Introduction and Overview Brief Description of the WL Circuit Breaker family 200kA to be interrupted The demands regarding WL Circuit Breaker have a lot to offer: reliably. communications It is possible to carry out Circuit breakers today are WL Circuit Breakers can be analysis and maintenance capability, data no longer simply devices adapted to different system procedures remotely via fo
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WL UL 489_Com-section 2 1/28/05 1:09 PM Page 3 Communication-capable Circuit Breakers WL Circuit Breaker Communications Capability of the The ability to change between two The CubicleBUS different parameter sets is also Electronic Trip Units (ETUs) The CubicleBUS, which connects all possible. This function is particularly The electronic trip units ETU745, the intelligent components within useful in the event of a power ETU748, ETU755, and ETU776 are the WL Circuit Breaker and enables failure
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WL UL 489_Com-section 2 1/28/05 1:09 PM Page 4 Communication-capable Circuit Breakers WL Circuit Breaker Functional overview of the trip unit system Basic Functions ETU725 ETU727 ETU745 Long-time overcurrent protection✔✔ ✔ Function can be switched ON/OFF – – – Setting range I = I x … 0.4, 0.45, 0.5, 0.55, 0.4, 0.45, 0.5, 0.55, 0.4, 0.45, 0.5, 0.55, 0.6, R n 0.6, 0.65, 0.7, 0.8, 0.6, 0.65, 0.7, 0.8, 0.65, 0.7, 0.8, 0.9, 1 0.9, 1 0.9, 1 Switch-selectable overload protection I n 2 4 (I t or I
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WL UL 489_Com-section 2 1/28/05 1:09 PM Page 5 Communication-capable Circuit Breakers WL Circuit Breaker Basic Functions ETU725 ETU727 ETU745 Parameter sets Selectable between parameter set A and B – – – LCD LCD, alphanumeric (4-line) – – O LCD, graphic – – – Communication CubicleBUS integrated – – ✔ Communication capability via MODBUS or PROFIBUS – – ✔ Metering function Metering function capability with Metering Function PLUS – – ✔ Display by LED Trip unit active ✔✔ ✔ Alarm ✔✔ ✔ ETU error
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WL UL 489_Com-section 2 1/28/05 1:09 PM Page 6 Communication-capable Circuit Breakers WL Circuit Breaker Functional overview of the trip unit system Basic Functions ETU748 ETU755 ETU776 Long-time overcurrent protection✔✔ ✔ Function can be switched ON/OFF – – – Setting range I = I x … 0.4, 0.45, 0.5, 0.55, 0.4 … 1 (step: 1A) 0.4 … 1 (step: 1A) R n 0.6, 0.65, 0.7, 0.8, 0.9, 1 Switch-selectable overload protection I n 2 4 (I t or I t dependent function)✔✔(via communications) ✔ L 2 Setting ran
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WL UL 489_Com-section 2 1/28/05 1:09 PM Page 7 Communication-capable Circuit Breakers WL Circuit Breaker Basic Functions ETU748 ETU755 ETU776 Parameter sets Selectable between parameter set A and B – ✔✔ LCD LCD, alphanumeric (4-line) O –– LCD, graphic – – ✔ Communication CubicleBUS integrated ✔✔ ✔ Communication capability via MODBUS or PROFIBUS ✔✔ ✔ Metering function Metering function capability with Metering Function PLUS ✔✔ ✔ Display by LED Trip unit active ✔✔ ✔ Alarm ✔✔ ✔ ETU error ✔✔ ✔
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WL UL 489_Com-section 2 1/28/05 1:09 PM Page 8 Communication-capable Circuit Breakers WL Circuit Breaker Data Availability on the CubicleBUS If a data source (module) does not exist, the data point does not exist either. All modules connected to the CubicleBUS can request data from other modules via the bus and generate data Again, the relevant property byte contains this themselves that can be read by other modules. information. Each data point in the comprehensive WL Circuit Breaker The fol
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WL UL 489_Com-section 2 1/28/05 1:09 PM Page 9 Communication-capable Circuit Breakers WL Circuit Breaker The MODBUS COM16 Module and the BSS Interposing relays must be used if The COM16 module enables the taking place via MODBUS (manual the opening and closing solenoids or automatic operation) or WL Circuit Breaker to exchange are designed for voltages other than parameters from being changed. data via MODBUS to supervisory 24V DC. All key events are assigned a time Terminals X9.1 and X9.2 mu
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WL UL 489_Com-section 2 1/28/05 1:09 PM Page 10 Communication-capable Circuit Breakers WL Circuit Breaker MODBUS Write Protection (DPWriteEnable) Write access via communications can be blocked either temporarily or permanently. The COM16 module features a hardware input for this purpose. Pin 1 provides the 24V DC supply, which can be connected to pin 2. If this input is not bridged, write access and control is disabled. The following actions are blocked if the input of the write-protect funct
