MICROMASTER 420 - Parameter List Issue 10/06 - User Documentation - Motor Thermal Protection Update

Oct 12, 2026

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Update note for Siemens MICROMASTER 420 inverter related to a revision of the UL “Safety of power conversion equipment” standard effective 9 May 2013. The software motor protection must retain motor temperature data after power cycling for correct use when power is reapplied. The document specifies compliant software versions, the stored temperature parameters (r0034/r0035) and changes to parameter P0610, including added value behaviors for warning and trip responses. It also lists products not receiving the software update and recommends external overload protection.

LanguageEnglish

CategoryHealthcare

FormatPDF

Pages201

Reading Time8 h 27 min

AccessFree to download

User Documentation

Operating Instructions

Parameter List

Catalogues

Product Information and Changes to Motor Thermal Protection

UL Standard Revision and Effective Date

Software Update Requirements and Affected Products

Parameter P0610 Changes and Default Behavior

Non-Compliant Products and External Overload Protection Recommendation

| MICROMASTER 420 | | | --- | --- | | |
Parameter List Issue 10/06 | User Documentation 6SE6400-5BA00-0BP0 Getting Started Guide Is for quick commissioning with SDP and BOP. | Operating Instructions
Gives information about features of the MICROMASTER 420, Installation, Commissioning, Control modes, System Parameter structure, Troubleshooting, Specifications and available options of the MICROMASTER 420. | | | --- | --- | | Parameter List
The Parameter List contains the description of all Parameters structured in functional order and a detailed description. The Parameter list also includes a series of function plans. | | | Catalogues
In the catalogue you will find all needs to select a certain inverter, as well as filters chokes, operator panels or communications options. | | s SINAMICS SIMATIC MICROMASTER Product Information Edition 08/2013 English Changes to the motor thermal protection feature of the MICROMASTER, SIMATIC & SINAMICS inverters On 9th November 2010 Underwriters Laboratories Inc. (UL) revised the standard for “safety of power conversion equipment” which covers Siemens inverters. These changes in the standard become effective from the 9th of May 2013. The changes relate to the performance of the software motor protection offered by the inverter, in that when the inverter is power-cycled it must now retain the motor temperature data for use when power is reapplied. The following products have had a software update to comply with the new requirements. • MICROMASTER 420 software V1 .3 or above. (Order No. 6SE6420 ) • MICROMASTER 430 software V2 .2 or above. (Order No. 6SE6430 ) • MICROMASTER 440 software V2.2 or above. (Order No. 6SE6440 ) • SINAMICS G110 software V1 .2 or above. (Order No. 6SL3211 ) • SINAMICS G110D software V3 .6 or above. (Order No. 6SL3511 ) • SINAMICS Pool CU-2 software V4 .6 or above *) (CU230P-2, CU240E-2, CU240B-2, G120C, CU240D-2, CU250D-2) . • SIMATIC ET200pro FC-2 software V4 .7 or above *) These products now, by default, store the motor temperature (r0034 for SINAMICS G110 and MICROMASTER 420; r0035 for SINAMICS G110D and MICROMASTER 430/440) and re-use this value when power is reapplied: Parameter P0610 has been changed to reflect this new requirement as follows: The default value of parameter P0610 is now 6 and the following settings have been added: • Value 4 = Warning Only, no reaction, no trip, save temperature on power down. • Value 5 = Warning, Imax reduction, trip F0011, save temperature on power down. • Value 6 = Warning , no reaction, trip F0011, save temperature on power down.*) Those units have other settings and default values. Please refer to the relevant parameter lists. The following products will not have the software update to support the new requirements. • All MICROMASTER 3 variants (Order No. 6SE32 ) • All MICROMASTER 410 (Order No. 6SE6410 ) • All MICROMASTER 411 (Order No. 6SE6411 ) • All MICROMASTER 436 (Order No. 6SE6436 ) • All MICROMASTER MMI / CM2 (Order No. 6SE96 ) These products are unchanged from their original design, but this is no longer compliant with the new requirements. These products may still bear the UL symbol but it is now the end users responsibility to provide listed motor overload protection external to the inverter. We suggest the end user consider devices such as the Siemens overload relay 3RU series on the motor side of the inverter in order to provide the motor protection, details of which can be found at the link below: [http://www.automation.siemens.com/mcms/industrial-controls/en/protection-equipment/overload](http://www.automation.siemens.com/mcms/industrial-controls/en/protection-equipment/overload)relays/pages/default.aspx *A5E31674145A* Deutsch Änderung zum thermischen Motorschutz bei Frequenzumrichtern MICROMASTER, SIMATIC und SINAMICS Ab 9. November 2010 hat “Underwriters Laboratories Inc. (UL)” den Standard “Safety

FAQs

What key requirement changed for motor thermal protection after power cycling?

After a power-cycle, the inverter software must retain motor temperature data so it can be reused when power is reapplied.

Which parameter was changed to implement the new motor temperature retention behavior?

Parameter P0610 was changed, with default value 6 and added settings (values 4, 5, and 6) describing warning/trip behavior and saving temperature on power down.

Do all MICROMASTER models receive the software update?

No. The document lists several products (including all MICROMASTER 3 variants and MICROMASTER 410/411/436) as unchanged and not compliant with the new requirements.

Oct 12, 2026

Upload by nayy☆