Siemens MICROMASTER 420 Reference Manual
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Siemens MICROMASTER 420 Reference Manual

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  • Page 2 MICROMASTER 420 Reference Manual Issue A1...
  • Page 3 Valid for A1 Release Inverter Type Control Version MICROMASTER 420 MM4 MICROMASTER 420 Reference Manual Issue A1...
  • Page 4 We welcome suggestions for improvement. Siemens handbooks are printed on chlorine-free paper that MICROMASTER® is a registered trademark of Siemens. has been produced from managed sustainable forests. No solvents have been used in the printing or binding process.

  • Page 5: Table Of Contents

    2.13 Operation from Unearthed Supplies ................27 2.14 Multi-Motor Connection ...................27 2.15 Control Modes (P1300) ...................27 2.16 Working with Binary Connectors (BiCo) ..............28 2.17 Acoustic Noise ......................35 2.18 Harmonic Currents ....................36 2.19 Power Losses ......................38 MICROMASTER 420 Reference Manual Issue A1...
  • Page 6 Working with Serial Communications ..............41 Using the Universal Serial Interface Protocol............43 PROFIBUS ......................60 PROFIBUS Module ....................61 Introduction ......................66 Variant Dependent Options ..................66 Variant Independent Options...................73 Troubleshooting with Status Display Panel .............76 MICROMASTER 420 Fault Codes ................76 Maintenance ......................78 MICROMASTER 420 Reference Manual Issue A1...
  • Page 7 Address (ADR) Bit Numbers....................44 Figure 3-4 Useful Data Characters ......................44 Figure 4-1 Inverter with Filter.........................66 Figure 4-2 Inverter with Input Choke......................67 Figure 4-3 Inverter with Output Choke ....................68 Figure 6-1 Fan Removal ........................78 MICROMASTER 420 Reference Manual Issue A1...
  • Page 8 Table 3-6 Inverter Status Word (PZD) ....................53 Table 3-7 Practical Examples .......................54 Table 3-8 Comparison Table (MICROMASTER 420/Earlier MICROMASTER) ........58 Table 3-9 Assignment of the PROFIBUS SUB-D socket connector .............63 Table 3-10 Maximum Cable Lengths for Data Transfer Rates..............63 Table 3-11 Order Numbers for Connectors and Cables .................63...
  • Page 9 Introduction This Chapter contains an introduction to the contents of the manual with a brief description of each chapter. Purpose of this Manual....................2 Compatibilty .......................2 MICROMASTER 420 Reference Manual Issue A1...

  • Page 10: Purpose Of This Manual

    Purpose of this Manual The purpose of this manual is to familiarize the user with the benefits and properties of the MICROMASTER 420 and to expand on information found in related documentation. Chapter 2 contains engineering information designed to assist the user in operating the inverter in the most efficient way and provides detailed information on derating factors and protection characteristics.
  • Page 11 Parameter P0100 = 0 or 1 allows the DIP switch (see above ) to be read. Parameter P1910 and P3900 calculate the motor parameters, like P088 on MM3. This is important on MICROMASTER 420 and is part of the quick commissioning. If the Binary Connectors (BiCo) settings of the digital inputs are enabled by setting P0701, 2 or 3 to 99, the only way to clear them is to reset all parameters using P0970.
  • Page 12 MICROMASTER 420 Reference Manual Issue A1...
  • Page 13 Engineering Information This chapter contains Information to assist the user in using the MICROMASTER 420 in the most efficient way. Topics include connection details, derating factors and methods of protecting the motor and inverter. Examples are given to illustrate the use of the parameter list.
  • Page 14 Working with Binary Connectors (BiCo) ..............28 2.16.1 Introduction ......................28 2.16.2 How does BiCo work? .....................28 2.16.3 Using Control and Status Words with BiCo.............30 2.16.4 BiCo Connections ....................31 2.17 Acoustic Noise ......................35 2.18 Harmonic Currents ....................36 2.19 Power Losses ......................38 MICROMASTER 420 Reference Manual Issue A1...
  • Page 15 BiCo Connections (r1170 to r2050) ..................33 Table 2-10 BiCo connections (r2053 to r2294) ..................34 Table 2-11 Acoustic Test Results ......................35 Table 2-12 Single Phase 230V Connection ....................36 Table 2-13 Three Phase 230V Connection.....................36 Table 2-14 Three Phase 400V Connection.....................37 MICROMASTER 420 Reference Manual Issue A1...

  • Page 16: Current Limit And Overload Operation

    Ã8‚‡…‚yyr… Q "#ÃQÃUr…€ Ahˆy‡†ÃÉÃXh…vt†) 6p‡v‚) Q "# ÃDÃUr…€ 6$ ÃÃ8ˆ……r‡ÃGv€v‡ SrqˆprÃA…r„ˆrp’ Srhp‡v‚Ã‡‚) 6$#ÃA#ÃD‰r…‡r…ÃP‰r…‡r€ƒr…h‡ˆ…r SrqˆprÃW‚y‡htr ‡ÃQ%  6$$ÃA$ÃD‰r…‡r…Ãà D ‡ SrqˆprÃQˆy†rÃA…r„ˆrp’ D‰r…‡r…ÃUr€ƒr…h‡ˆ…rÃQ!( 6$%ÃÃD‰r…‡r…Ã9ˆ‡’Ã8’pyr Shv†rÃXh…vt 6$ ÃA ÃH‚‡‚…ÃÃD ‡ U…vƒ Sr†ˆy‡vtÃ8ˆ……r‡ Figure 2-1 Current Limit Interaction MICROMASTER 420 Reference Manual Issue A1...

  • Page 17: Fast Current Limit

    (i.e. in milliseconds), thus preventing spurious and unwanted trips when sudden loads are applied or fast accelerations requested. FCL is especially useful when working in open loop control to override unwanted currents. MICROMASTER 420 Reference Manual Issue A1...

  • Page 18: Positive Temperature Coefficient Resistor Use

    You can verify the heatsink temperature by displaying Parameter r0037. Units are given in degrees Celsius ( C). Removing a faulty fan is described in Chapter 6, Maintenance. MICROMASTER 420 Reference Manual Issue A1...

  • Page 19: Overvoltage And Trip Levels

    100% boost is the voltage given by: Stator resistance (P0350) multiplied by rated motor current (P0305). Which means that changing the value of these parameters will affect the boost level. Voltage Boost Increases voltage here Frequency Figure 2-3 Boost Level MICROMASTER 420 Reference Manual Issue A1...

  • Page 20: Proportional And Integral Control (Pi)

    2.8.2 Implementation on MICROMASTER 420 The MICROMASTER 420 has a built in PI controller that can be enabled by the user to allow closed loop control. Once the PI controller is enabled (using P2200), the PI controller internally generates the motor frequency necessary to minimize the error between the PI setpoint and the PI feedback.
  • Page 21 For the majority of applications, this will be in the form of an analogue sensor. The MICROMASTER 420 has one analogue input, terminal connections 3 & 4, and the feedback signal can be connected to this input. The source of the PI feedback signal must then be defined using P2264 = 755 (source of PI feedback = analogue input 1).

  • Page 22: Pi Setpoint Ramp Times

    The traces show the PI feedback signal, with 1 V = 10%. The different responses are achieved by varying the settings of P2280 and P2285. Figure 2-4 Quick response with overshoot: P2280 = 0.30; P2285 = 0.03 s MICROMASTER 420 Reference Manual Issue A1...
  • Page 23 (e.g. P2280 = 0.20) and adjusting the I term until stable operation constant achieved. A small PI setpoint change should then be given and depending on the system response the parameters adjusted according to the tendencies shown in the figures above. MICROMASTER 420 Reference Manual Issue A1...

  • Page 24: Ziegler-Nichols Method Of Optimisation

    To allow this the following parameters are set: P2200 = 0 P1120 = 0.0 s P1121 = 0.0 s P1080 = 50.0 Hz. Figure 2-7 Response to 5 Hz step: L = 100 ms MICROMASTER 420 Reference Manual Issue A1...
  • Page 25 (0.9)(T)(∆f) / (L)(∆x) = 9.84 time = 0.30 s = The PI controller should now be enabled (P2200 = 1). Figure 2-9 Step Response in PI control with P2280 = 9.84 and P2285 = 0.30 MICROMASTER 420 Reference Manual Issue A1...

  • Page 26: Pi Output Limits

    Setting P2292 to a negative value allows bipolar operation of the PI controller. 2.8.8 Further features Further features, such as a PI setpoint trim can be accessed in user access level 3 (P0003 = 3). These features are described in the Parameter List. MICROMASTER 420 Reference Manual Issue A1...
  • Page 27 Feedback Source ÃsrrqihpxÇu…r†u‚yq r2272 P2264 Q!!%& ‘ Hvv€ˆ€ ÃsrrqihpxÇu…r†u‚yq Q!!%' Q!!%( ArrqihpxÃBhv QDÃPˆ‡ƒˆ‡ÃVƒƒr…Gv€v‡ Q!!( QDÃPˆ‡ƒˆ‡ÃG‚r…ÃGv€v‡ Grtrq Q!!(! D‡hyvp† Gr‰ryÃ"ÃQh…h€r‡r…†ÃPy’ Q!!(" The source is user defined 6ppry9rpryÇv€rÂsÃQDÃyv€v‡† using BiCo connectors Figure 2-10 PI Basic Block Diagram MICROMASTER 420 Reference Manual Issue A1...

  • Page 28: Braking

    (regeneration) to return to the DC link. To overcome this possibility the MICROMASTER 420 employs a number of methods to control braking. These options are described in the following paragraphs.

  • Page 29: Vdc Max Controller

    2.9.3 Vdc Max Controller The MICROMASTER 420 has a controller to limit the DC voltage ( Vdc Max controller). When braking a load faster than would normally be possible, excess energy has to be dissipated. This energy is unable to go back into the input supply so the result is that the DC link voltage rises.

  • Page 30: Derating Factors

    Input cable length has no influence. All MICROMASTER 420 inverters are fully tested and characterized for worst case operation (50 C, Full load current etc. default switching frequency) when used with...
  • Page 31 200 V – 240 V 2.2 W – 4 kW 380 V – 480 V 3.0 W – 5.5 kW 200 V – 240 V 5.5 W – 11 kW 380 V – 480 V MICROMASTER 420 Reference Manual Issue A1...

  • Page 32: Derating With Altitude

    2.10.4 Derating with Switching Frequency The default switching frequency of the MICROMASTER 420 is 16 kHz for low voltage units (230 V)and 4 kHz for high voltage units (400 V). This is usually adequate for most applications and will allow full performance to be obtained from all products over the full temperature range.

  • Page 33: Derating For Sideways Installation

    4 kW to be derated to 3 kW. 5.5 kW to be derated to 3.66 kW. In output current terms this means 13.6 A for the 4 kW inverter and 16.5 A for the 5.5 kW inverter. MICROMASTER 420 Reference Manual Issue A1...

  • Page 34: Cubicle Calculations

    2.11 Cubicle Calculations The MICROMASTER 420 will operate in a temperature of 50 °C without de-rating. Ensure that the inlet and outlet ducts are not blocked, for example by cables. Check also that the positioning of units inside the cubicle do not obstruct natural ventilation.

  • Page 35: Operation From Unearthed Supplies

    2.13 Operation from Unearthed Supplies The MICROMASTER 420 can be used on unearthed input supplies. In order to do this it is necessary to remove the Y Caps (See Appendix D in the Operating Instructions), and also to fit an output choke. (See Chapter 4, Options or choose the Options category on the CD-ROM supplied with the inverter.) If a fault...

  • Page 36: Working With Binary Connectors (Bico)

    (digital, analogue, serial etc.) and outputs (inverter current, frequency, analogue output, relays etc.). The MICROMASTER 420 uses a simplified version of BiCo, which is still very flexible, is contained within the parameter set and can be set up without using additional software or hardware.
  • Page 37 Enables digital input 3. instead of normal ramp times. Steps 3 and 4 use BiCo functions to set digital input 1 and 2. This function can also be set using normal parameterization in Level 2. MICROMASTER 420 Reference Manual Issue A1...

  • Page 38: Using Control And Status Words With Bico

    2.16.3 Using Control and Status Words with BiCo Many MICROMASTER 420 read only parameters consist of control words. The parameter is made up of a 16 bit number, each bit representing a particular value. For example, parameter P0052 (Status Word 1) gives various value settings such as Inverter ready (bit 0), or Motor Current Limit (bit b).

  • Page 39: Bico Connections

    2019 CIW CI: PZD to Comm-Link (USS) 2051 CIW CI: PZD to CB 2200 CIB BI: Enable PID controller 2253 CIF CI: PID setpoint 2254 CIF CI: PID trim source 2264 CIF CI: PID feedback MICROMASTER 420 Reference Manual Issue A1...
  • Page 40 2019 CIW CI: PZD to Comm-Link (USS) 2051 CIW CI: PZD to CB 2200 CIB BI: Enable PID controller 2253 CIF CI: PID setpoint 2254 CIF CI: PID trim source 2264 CIF CI: PID feedback MICROMASTER 420 Reference Manual Issue A1...
  • Page 41 2019 CIW CI: PZD to Comm-Link (USS) 2051 CIW CI: PZD to CB 2200 CIB BI: Enable PID controller 2253 CIF CI: PID setpoint 2254 CIF CI: PID trim source 2264 CIF CI: PID feedback MICROMASTER 420 Reference Manual Issue A1...
  • Page 42 2019 CIW CI: PZD to Comm-Link (USS) 2051 CIW CI: PZD to CB 2200 CIB BI: Enable PID controller 2253 CIF CI: PID setpoint 2254 CIF CI: PID trim source 2264 CIF CI: PID feedback MICROMASTER 420 Reference Manual Issue A1...

  • Page 43: Acoustic Noise

    Laboratory tests have determined the level of noise generated by the range of MICROMASTER 420 Inverters. The inverters were set up to run a standard 4-pole Siemens motor at frequencies from 0 – 100 Hz. All specified switching frequencies were tested with loads of 25%, 50%, 75% and 100%.

  • Page 44: Harmonic Currents

    7.92 4.49 0.61 0.26 0.16 0.10 0.07 6SE6420-2UC23-0CA0 UNFILTERED 11.20 6.41 0.84 0.36 0.20 0.11 0.12 6SE6420-2UC24-0CA0 UNFILTERED 11.20 6.41 0.84 0.36 0.20 0.11 0.12 6SE6420-2UC25-5CA0 UNFILTERED 13.90 7.77 1.00 0.45 0.25 0.13 0.11 MICROMASTER 420 Reference Manual Issue A1...
  • Page 45 0.00 0.00 6SE6420-2UD24-0BA0 UNFILTERED 6SE6420-2AD25-5CA0 6.78 4.20 0.20 0.10 0.10 0.10 0.00 6SE6420-2UD25-5CA0 UNFILTERED 6SE6420-2AD27-5CA0 9.24 5.60 0.30 0.10 0.10 0.10 0.10 6SE6420-2UD27-5CA0 UNFILTERED 6SE6420-2AD31-1CA0 13.53 7.90 0.50 0.10 0.10 0.10 0.10 6SE6420-2UD31-1CA0 UNFILTERED MICROMASTER 420 Reference Manual Issue A1...

  • Page 46: Power Losses

    2.19 Power Losses Figure 2-16 shows the power loss for the MICROMASTER 420 Inverters. The graphs can be used to read either the loss at full load of a particular variant or to read the part load loss. For example, the full load loss of a 0.55 kW 400 V inverter is 52 W;...

  • Page 47: Using The Serial Interface

    Tasks and reply for USS..................47 3.3.5 PKW Examples:.......................49 3.3.6 PZD area (Process Data area) ................51 Task telegram (Master → MICROMASTER 420)............52 3.3.7 Reply telegram (MICROMASTER 420 → Master) ..........53 3.3.8 3.3.9 Parameter settings on MICROMASTER 420 for USS..........55 3.3.10 Basic Setup......................56 3.3.11 Common advanced settings ..................56...
  • Page 48 Table 3-6 Inverter Status Word (PZD) ....................53 Table 3-7 Practical Examples .......................54 Table 3-8 Comparison Table (MICROMASTER 420/Earlier MICROMASTER) ........58 Table 3-9 Assignment of the PROFIBUS SUB-D socket connector .............63 Table 3-10 Maximum Cable Lengths for Data Transfer Rates..............63 Table 3-11 Order Numbers for Connectors and Cables .................63...
  • Page 49 Introduction This section describes the hardware aspects of the serial communications that are used with the MICROMASTER 420. It does not discuss or detail the software protocols that are used or how to debug software. Software protocols are discussed later in the manual.
  • Page 50 The following notes should help to understand hardware problems that occur with RS485 systems and Siemens inverters. RS485 is used extensively during the testing of the MICROMASTER 420 in production, and is therefore fully tested before the unit is shipped.

  • Page 51: Using The Universal Serial Interface Protocol

    LGE as the STX and LGE bytes are not counted in the LGE. For MICROMASTER 420 variable length telegrams and fixed length telegrams can both be used. This can be selected using parameters P2012 and P2013 to define the PZD and PKW lengths.
  • Page 52 (Task ID) or the type of reply telegram (Reply ID). They also define the inverter parameter number (PNU) which is being accessed by the telegram. The PNU number refers to MICROMASTER 420 parameter numbers e.g. 1082 = P1082 = F †‡Ã...
  • Page 53 0 ... 1999 30000 ... 31999 Bit 15 has the weighting 2 so that this bit must be set for parameter numbers 2000 to 3999. MICROMASTER 420 does not have parameter numbers greater than 3999. The 3 and 4 words, PWE1 and PWE2 contain the parameter value for the parameter being accessed.
  • Page 54 PKW has been selected using P2013. The examples should explain this more clearly later in this section. • The MICROMASTER 420 parameter list must be consulted to understand the meaning of the parameter values, and their appropriate settings. MICROMASTER 420 Reference Manual...
  • Page 55 The slave reply PKW will be either 3 or 4 words as well. If a fixed length is used with MICROMASTER 420, this should be 4, as 3 would not be sufficient to support many of the parameters (i.e. double words). For variable length of PKW (127) the Master sends only the necessary number of words for the task in the PKW area.
  • Page 56 32-bit integer (double word) Float: IEEE float format (double word) I16 and I32 are not used for user parameters on MICROMASTER 420. U32 are double word integers e.g. P0731. Here the integers are separated by a decimal point. The part before the decimal point appears in PWE1 while the part after the decimal point appears in PWE2.
  • Page 57 To read a parameter between 2000 and 3999, you must set the PNU extension in the 2nd word (IND). → requests value of P2000. → the reply tells us this is a double word with value 4248 0000 (IEEE float value) i.e. 50.00. MICROMASTER 420 Reference Manual Issue A1...
  • Page 58 "drive converter status does not permit the set task at the moment". • If you want the changed value to be stored in the EEPROM, the Task ID 13 (=D hex) should be used. MICROMASTER 420 Reference Manual Issue A1...
  • Page 59 This is a level 3 parameter, so you must set P0003 = 3 to access it. There are four possible settings, 0, 3, 4 and 127. For MICROMASTER 420 the most useful are 127 = variable= [default setting] or 4. It is important to note that if the setting 4 is...
  • Page 60 Task telegram (Master → MICROMASTER 420) 3.3.7 The first word of the PZD task telegram is the inverter control word (STW). Provided that the inverter is being controlled over USS, (see parameter P0700), the control word has the following meaning:...
  • Page 61 Reply telegram (MICROMASTER 420 → Master) 3.3.8 The first word of the PZD reply telegram is the inverter status word (ZSW). This is normally the inverter status word as defined in parameter r0052. This is defined as follows: Table 3-6...
  • Page 62 The example “Using BiCo with USS” should give an indication of how this can be achieved. USS Broadcast mode allows all slaves to be addressed with a single telegram, thus allowing groups of inverters to be started and stopped simultaneously. MICROMASTER 420 Reference Manual Issue A1...
  • Page 63 3.3.9 Parameter settings on MICROMASTER 420 for USS The MICROMASTER 420 has two possible serial interfaces which can be used for USS communication: RS232 and RS485. The RS232 is realized using an option module (order no. 6SE6400-1PC00-0AA0). The RS485 interface uses terminals 14 and 15 for P+ and N- respectively.
  • Page 64 = USS telegram off time (ms). This allows the user to set a time after which the fault F070 is generated if no telegram is received. The default setting is 0 ms, which disables the timer. MICROMASTER 420 Reference Manual Issue A1...
  • Page 65 MICROMASTER products. The meaning of bits 11 and 12 have changed. In order to get the motor to run right with MICROMASTER 420, bit 11 should be 0 (on MM3 it was 1). To run left, bit 11 should be set to 1 (it was 0 on MM3 and bit 12 was 1).
  • Page 66 IEEE float format, which necessitates the use double word parameter values and thus requires a longer PKW part of the telegram. This brings MICROMASTER 420 in line with other Siemens inverters such as MasterDrive.
  • Page 67 Using BiCo with USS The additional BiCo functionality can be used to achieve greater flexibility when controlling the inverter of USS. As was discussed earlier, the MICROMASTER 420 can operate with a PZD length defined by the user in P2012. This means that either one or two control words can be sent from the USS master.
  • Page 68 There are three versions of PROFIBUS: FMS, DP and PA and all these versions will work together. The most commonly used version is the DP version, intended for general industrial applications. This is the version supported by Siemens Drives. 3.4.2 Using the PROFIBUS In order to connect to a PROFIBUS system, a PROFIBUS module is required.
  • Page 69 PROFIBUS Module This option allows the MICROMASTER 420 to be controlled via a PROFIBUS-DP serial bus (SINEC L2-DP). PROFIBUS-DP is a cost-effective high-speed serial communication system optimized for the actuator/sensor area where very short system reaction times are critical. It operates as a decentralized I/O system whereby the traditional wiring to the sensors and actuators is replaced by an RS485 serial bus system linking the stations together.
  • Page 70 Local control of the drive with the On, Off, Jog and Reverse buttons is possible at all times in an identical fashion to when the module is not present. The PROFIBUS cable is connected to the 9 way SUB-D socket on the front of the PROFIBUS Module. MICROMASTER 420 Reference Manual Issue A1...
  • Page 71 Bus Connector with PG interface 6ES7 972-0BA10-0XA0 Bus connector without PG interface 6XV1830-0AH10 Bus cable 20m-1000m A floppy disk is supplied with the PROFIBUS module containing the handbook and 2 data files for configuring the relevant PLC system. MICROMASTER 420 Reference Manual Issue A1...
  • Page 72 Table 3-13 PROFIBUS Ordering information PROFIBUS module 6SE3290-0XX87-8PB0 Block package for SIMATIC S5 DVA_S5 6DD1800-0SW0 Supplied as 3.5” floppy disk Block package for SIMATIC S7 including DVA_S7 and Drives 6SX7005-0CB00 Object Manager. Supplied as CD MICROMASTER 420 Reference Manual Issue A1...
  • Page 73 Recommended Fuses (380 V – 480 V) ................70 Table 4-4 Recommended Circuit Breakers (230 V Single-phase) ............71 Table 4-5 Recommended Circuit Breakers (230 V Three-phase)............71 Table 4-6 Recommended Circuit Breakers 380 V – 480 V) ..............72 MICROMASTER 420 Reference Manual Issue A1...

  • Page 74: Introduction

    Introduction Several options are available for use with Siemens Standard inverters. These are intended to assist product selection, installation and commissioning in certain applications. Variant Dependent Options 4.2.1 Filters MICROMASTER 420 inverters are designed to minimize conducted and radiated interference. However, they are power electronic products and generate significant levels of interference over a wide electromagnetic spectrum.

  • Page 75: Chokes

    The choke compensates for the stray capacitance of the cables. Recommended chokes for different cable lengths and inverters are available. Detailed installation drawings are contained in the CD-ROM supplied with the inverter. MAINS INPUT INPUT CHOKE OUTPUT Figure 4-2 Inverter with Input Choke MICROMASTER 420 Reference Manual Issue A1...

  • Page 76: Gland Plates

    Gland plates are mechanical assemblies added to the inverters to assist the installation of screened power and control cables. Shielded connections of the power and control cables ensure optimum EMC performance. Please refer to the CD-ROM supplied with the inverter for detailed installation drawings. MICROMASTER 420 Reference Manual Issue A1...

  • Page 77: Fuses

    6SE6420-2UC23-0CA0 3NA3810 4.00 5.00 Unfiltered FS C 6SE6420-2UC24-0CA0 3NA3812 5.50 7.50 Unfiltered FS C 6SE6420-2UC25-5CA0 3NA3814 3.00 4.00 FS C 6SE6420-2AC23-0CA0 3NA3810 4.00 5.00 FS C 6SE6420-2AC24-0CA0 3NA3812 5.50 7.50 FS C 6SE6420-2AC25-5CA0 3NA3814 MICROMASTER 420 Reference Manual Issue A1...
  • Page 78 FS B 6SE6420-2AD22-2BA0 3NA3805 3.00 4.00 FS B 6SE6420-2AD23-0BA0 3NA3805 4.00 5.30 FS B 6SE6420-2AD24-0BA0 3NA3807 5.50 7.30 FS C 6SE6420-2AD25-5CA0 3NA3807 7.50 10.00 FS C 6SE6420-2AD27-5CA0 3NA3810 11.00 15.00 FS C 6SE6420-2AD31-1CA0 3NA3814 MICROMASTER 420 Reference Manual Issue A1...

  • Page 79: Circuit Breakers

    6SE6420-2UC23-0CA0 3RV1021-4BA10 4.00 5.00 Unfiltered FS C 6SE6420-2UC24-0CA0 3RV1021-4CA10 5.50 7.50 Unfiltered FS C 6SE6420-2UC25-5CA0 3RV1031-4FA10 3.00 4.00 FS C 6SE6420-2AC23-0CA0 3RV1021-4BA10 4.00 5.00 FS C 6SE6420-2AC24-0CA0 3RV1021-4CA10 5.50 7.50 FS C 6SE6420-2AC25-5CA0 3RV1031-4FA10 MICROMASTER 420 Reference Manual Issue A1...
  • Page 80 FS B 6SE6420-2AD22-2BA0 3RV1021-1HA10 3.00 4.00 FS B 6SE6420-2AD23-0BA0 3RV1021-1KA10 4.00 5.30 FS B 6SE6420-2AD24-0BA0 3RV1021-1KA10 5.50 7.30 FS C 6SE6420-2AD25-5CA0 3RV1021-4AA10 7.50 10.00 FS C 6SE6420-2AD27-5CA0 3RV1021-4BA10 11.00 15.00 FS C 6SE6420-2AD31-1CA0 3RV1031-4FA10 MICROMASTER 420 Reference Manual Issue A1...

  • Page 81: Variant Independent Options

    The clear text operating panel consists of a control and display unit that fits directly on top of the MICROMASTER 420. A D-Type socket connects directly onto the D- type on the front of the unit, so the AOP can take power from and communicate with the inverter via the RS485 interface.

  • Page 82: Profibus Module

    AOP and a computer for example. In this case the RS485 is fully utilized; the RS232 interface on the inverter can then be used by a second BOP or AOP if required. MICROMASTER 420 Reference Manual Issue A1...

  • Page 83: Micromaster 420 Fault Codes

    This chapter contains an explanation of troubleshooting with the Status Display Panel. Troubleshooting with Status Display Panel .............76 MICROMASTER 420 Fault Codes ................76 Table 5-1 Inverter conditions indicated by the LEDs on the SDP ............76 MICROMASTER 420 Reference Manual...
  • Page 84 RAM failure (both LEDs alternate flashing). S ñÃPÃ‡v€rÃ(Àvyyv†rp‚q† S!ñÃPÃ‡v€rÃ"Àvyyv†rp‚q† MICROMASTER 420 Fault Codes In the event of a failure, the inverter switches off and a fault code appears on the display. See Operating Instructions, Chapter 6, Troubleshooting for an explanation of these codes.

  • Page 85: Maintenance

    Maintenance This chapter contains an illustration showing the method of removing the fan from the inverter. Maintenance ......................78 Figure 6-1 Fan Removal ........................78 MICROMASTER 420 Reference Manual Issue A1...
  • Page 86 Maintenance The MICROMASTER 420 itself has no user serviceable components. However, after prolonged use, the fan mounted on the bottom of the inverter may become unserviceable. In this case, the fan can easily be removed and exchanged. The faulty fan should be disposed of according to local regulations. Figure 6-1 illustrates the method of removal.
  • Page 87 Applicable Standards This Appendix contains a brief explanation of the standards used in the design of MICROMASTER 420. MICROMASTER 420 Reference Manual Issue A1...
  • Page 88 Underwriters Laboratories UL and CUL LISTED POWER CONVERSION EQUIPMENT 5B33 for use in a pollution degree 2. ISO 9001 Siemens plc operates a quality management system which complies with the requirements of ISO 9001. MICROMASTER 420 Reference Manual Issue A1...
  • Page 89 Cubicle Calculations advantages & features Current Limit cable lengths parameter interaction characteristics parameters controlling connections Current Monitoring order numbers accuracy setting up Protection Characteristics fast current limit overtemperature overvoltage and trip thermal using PTC resistors MICROMASTER 420 Reference Manual Issue A1...
  • Page 90 RS232 RS485 compatibility troubleshooting defined reply ID defined tasks detailed description parameter types Serial Communications an introduction Status Display Panel reply telegram LED status definition setting up task telegram telegram structure useful data characters MICROMASTER 420 Reference Manual Issue A1...
  • Page 91 Name: Issue: Should you come across any printing Company/Service Department errors when reading this publication, please notify us on this sheet. Address: Suggestions for improvement are also welcome. Telephone: __________ / Telefax: ________ / MICROMASTER 420 Reference Manual Issue A1...
  • Page 92 MICROMASTER 420 Reference Manual Issue A1...
  • Page 93 Standard Display Panel fitted Power Terminal Connections Control Terminal Connections Access to “Y Cap“ MICROMASTER 420 Reference Manual Issue A1...
  • Page 94 MICROMASTER 420 Reference Manual Issue A1...

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