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ABB CMS-660 User Manual
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ABB CMS-660 User Manual

ABB CMS-660 User Manual

Measurement instrument for current branch monitoring, up to 32 branch sensors.
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CIRCUIT MONITORING SYSTEM
CMS-660
User manual
• Current monitoring at solar plant's string level
• Immediate detection of unusual system status (e.g. solar shading,
over-voltages, breaker trip, high temperature)
• Simplified installation thanks to quick mounting of sensors
• Smart commissioning in only a few minutes
• Easy retrofitting and upgrade thanks to the flexible, modular design

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Summary of Contents for ABB CMS-660

  • Page 1 — CIRCUIT MONITORING SYSTEM CMS-660 User manual • Current monitoring at solar plant's string level • Immediate detection of unusual system status (e.g. solar shading, over-voltages, breaker trip, high temperature) • Simplified installation thanks to quick mounting of sensors • Smart commissioning in only a few minutes...

  • Page 3: Table Of Contents

    CMS-660 SYSTEM CIRCUIT MONITORING SYSTEM (CMS) — Table of contents Use and Storage of the Manual General Information Packaging Contents 007–010 Product Overview 011–013 Components of CMS system 014–017 Installation Guide Wiring Diagrams Initial Commissioning 020–026 Modbus 027–029 Modbus Mapping...

  • Page 4: Use And Storage Of The Manual

    The information contained in this document is subject to change without notice and cannot be considered as an obligation by ABB Ltd. ABB Ltd. is not liable for any errors that may appear in this document. ABB Ltd. is not liable under any circumstances for any direct, indirect, special, incidental or consequential damage of any kind that may arise from using this document.

  • Page 5: General Information

    CMS-660 SYSTEM CIRCUIT MONITORING SYSTEM (CMS) — General Information — Cleaning Use a dry cloth. Ensure that the device and all related circuits are not under voltage prior to clean the device. — Safety warnings Attention: Non-adherence to the following points can lead to serious injury or death.

  • Page 6: Packaging Contents

    CMS-660 SYSTEM CIRCUIT MONITORING SYSTEM (CMS) — Packaging Contents - Control unit (CMS-660) - Installation manual CMS-660 Control Unit Status Network Reset Attention: The following items are not included in the delivery of the product 1) CMS-Sensors 2) Power supply...

  • Page 7: Product Overview

    The system consists of a control unit and sensors. The sensors measure alternating, direct and mixed currents (TRMS) up to 80 A and are connected to the control unit by a flat cable, the CMS-Bus. Up to 32 sensors can be connected to each CMS-660 control unit.
  • Page 8 Modbus ID (factory reset). Do not switch off the power supply during the reset process. — LEDs Two LEDs on CMS-660 indicate respectively the status of the device and the status of the network. 1. LED Status Device is off Green on...

  • Page 9: Technical Specifications

    CMS-660 SYSTEM CIRCUIT MONITORING SYSTEM (CMS) — Product Overview Technical specifications CMS-660 control unit General data Degree of protection IP20 Operating temperature [°C] − 25 .. +70 Storage temperature [°C] − 40 .. +85 — Dimensions W / H / D [mm] 71.8 x 87.0 x 64.9 (4 modules)
  • Page 10 CMS-660 SYSTEM CIRCUIT MONITORING SYSTEM (CMS) — Product Overview Overall dimensions 50.5 71.8...
  • Page 11 CMS-660 SYSTEM CIRCUIT MONITORING SYSTEM (CMS) — Components of CMS system — Control unit CMS-Bus interface with up to 32 sensors Digital input port LEDs Micro-USB port Reset button 24 V DC external Power supply Serial RS-485 port: Modbus RTU —...
  • Page 12 CMS-660 SYSTEM CIRCUIT MONITORING SYSTEM (CMS) — Components of CMS system — Sensors overview System Pro M, SMISSLINE S800 DIN rail Cable tie Mounting method for all MCBs, RCDs, for MCBs for fuse for all S800 devices universally universally RCBOs with...
  • Page 13 CMS-660 SYSTEM CIRCUIT MONITORING SYSTEM (CMS) — Components of CMS system — CMS Flat Cable The CMS flat cable is a 4-wire cable for connecting multiple sensors to one control unit. The cable is available in the following four lengths: 2 m (CMS-800), 5 m (CMS-802), 10 m (CMS-803), and 30 m (CMS-805).
  • Page 14 For assembly of the control unit, perform steps 1 and 2. The device can be mounted horizontally or vertically. To dismantle perform steps 3 and 4. The CMS-660 can be mounted on all 35mm DIN rails (DIN50022) and on SMISSLINE sockets.
  • Page 15 CMS-660 SYSTEM CIRCUIT MONITORING SYSTEM (CMS) — Installation Guide — Flat Cable – Assembly of Connectors • Use the connectors only once • Connect max. 32 sensors to the CMS-Bus interface of the control unit • Consider the maximum flat cable length •...
  • Page 16 — Mounting of System pro M compact and SMISSLINE Sensors • Sensors fit to all ABB installation devices with twin terminals • Flat cable should not exert force on the sensor, otherwise measuring deviations may occur 1. Unscrew the terminal of the installation device.
  • Page 17 CMS-660 SYSTEM CIRCUIT MONITORING SYSTEM (CMS) — Installation Guide — Mounting of cable tie sensors • The cable should not exert force on the sensor, otherwise measuring deviations may occur 1. Insert the cable into the installed device through the opening on the sensor.

  • Page 18: Wiring Diagrams

    The CMS-660 control unit requires a 24 V DC external power supply. Installation Installation of CMS-660 to the 24 V DC supply shall include a switch or circuit breaker for the connection to the supplying device, or the installation of the supplying device shall include a switch or circuit breaker for the connection to mains.

  • Page 19: Initial Commissioning

    In order to guarantee a correct commissioning of the device, please follow the procedure here described: 1. Connect the CMS-660 control unit to the external power supply: the device switches on and the initial commissioning phase automatically begins. 2. The LED “Status” on the front of the device starts to blink in yellow, indicating no sensor is assigned to the control unit.
  • Page 20 CMS-660 SYSTEM CIRCUIT MONITORING SYSTEM (CMS) — Modbus — Communication protocol Introducing Modbus protocol The Modbus serial line protocol is a Master-Slave protocol. This means that only one master and one or more slave nodes (max. 247) can be connected to the same serial bus. A Modbus communication is always initiated by the master and there is only one transaction at the same time.
  • Page 21 The CMS-660 USB COM port offers the same Modbus map / functions / registers / behavior as described for the Modbus RTU / RS-485 interface. The CMS-660 connects as virtual COM port. Please note that the baud rate configured for COM port on master side is not relevant in this USB mode.
  • Page 22 CMS-660 SYSTEM CIRCUIT MONITORING SYSTEM (CMS) — Modbus Error Codes Modbus protocol defines a common way of error reporting. Every request (read or write) sent in unicast mode is expected to return a value in packet of the same structure. In case of a message delivery error (not a CRC problem but a message execution problem), the generated response contains a function code with MSB (80h) set and a single byte representing the error code, called “exception code”.
  • Page 23 CMS-660 SYSTEM CIRCUIT MONITORING SYSTEM (CMS) — Modbus Trigger hold, reset min and max values Write operation on this register [3010h] • triggers the hold measurement of all sensors, and / or • resets the minimal and maximal values of all sensors.
  • Page 24 CMS-660 SYSTEM CIRCUIT MONITORING SYSTEM (CMS) — Modbus Change Sensor ID Write operation on this register [3014h] allows to change a sensor ID. Bit 8 to 15 contains the “from ID”, Bit 0 to 7 the “to ID”. • If “from ID” contains 00h, physical assignment procedure for the “from ID” starts.
  • Page 25 CMS-660 SYSTEM CIRCUIT MONITORING SYSTEM (CMS) — Modbus Operation mode This register [3000h] describes the operation mode and response behavior on measurement read requests. Value Description xxx0 Normal operation This bit is set by control unit, writing this bit is ignored...
  • Page 26 CMS-660 SYSTEM CIRCUIT MONITORING SYSTEM (CMS) — Modbus Sensor physical assignment time out, start procedure This register [3001h] describes the time out after start of sensor physical assignment procedure during control unit's start procedure. When control unit starts and doesn’t find any assigned sensors, the LED “Status”...
  • Page 27 CMS-660 SYSTEM CIRCUIT MONITORING SYSTEM (CMS) — Modbus Mapping Addr. Words Description Resolution Unit Format Access (hex) (16 bit) Ongoing measurement values: These registers contain the actual measured data. 0000 TRMS value of Sensor 1 0.01 unsigned R (03) 0001 TRMS value of Sensor 2 0.01...
  • Page 28 CMS-660 SYSTEM CIRCUIT MONITORING SYSTEM (CMS) — Modbus Mapping Addr. Words Description Resolution Unit Format Access (hex) (16 bit) Maximum measured values: These registers contain the maximum measured values since last system start or reset 0800 TRMS max value of Sensor 1 0.01...
  • Page 29 CMS-660 SYSTEM CIRCUIT MONITORING SYSTEM (CMS) — Modbus Mapping Addr. (hex) Words Description Resolution Unit Format Access (16 bit) Serial number (SID), version of sensors 1000 SID, version of Sensor 1 special R (03) 1010 SID, version of Sensor 2...
  • Page 30 Topic Explanation Modbus Master / Slave The CMS-660 does not have a Modbus master function. It operates as a slave and can be addressed accordingly in the settings. Current direction There is no current direction detection for AC. For DC measurement, the current direction can be read and modified via the corresponding polarity registers for each sensor.
  • Page 32 Electrification Products Division Business Unit Building Products www.abb.com/lowvoltage © Copyright 2018 ABB. All rights reserved. Due to possible changes in design and materials, the features and sizes contained in this catalog are to be considered as binding only after confirmation by ABB.