MicroMaster 440 Status Word ZSW

Galaniz · Jun 22, 2012

I have looked through some posts on the site and have not found this specifically addressed. Please forgive me if I just didn't see it. I am usually a lurker on this site and don't participate too much.

I am reading a the staus word off of a micromaster 440 through profibus and I would like to know what combination of bits indicate that the micromaster is operating (running). What confuses me is the manual that says bit 0 - ready to start, bit 1 - ready to start, bit 2 operation enabled.

The fault bit 3 doesn't help because The VFD can be off and not faulted.

The only thing I came up with is to read the actual speed and if greater than 0 AND if fault bit is zero then the VFD is running.

Can anyone tell me if they have another way based off of the staus word to tell if the VFD is moving.

Gabe

Lancie1 · Jun 22, 2012

Gabe,
It appears from the Siemens Micromaster User Manaul, that you need to read the Siemens Micromaster 440 VFD memory word "r0002". When r0002 = 4, then the drive is in run mode.

Monitoring parameters
These can only be read – "r" parameters
These parameters are used to display internal quantities, for example states and actual values. These parameters are absolutely necessary, especially for diagnostics.

Notation:
r0002 monitoring parameter 2
r0052.3 monitoring parameter 52, bit 03
r0947[2] monitoring parameter 947 index 2
r0964[0...4] monitoring parameter 964 with 5 indices (indices 0 to 4)
Abbreviated notation
r0964[5] monitoring parameter 964 with 5 indices (indices 0 to 4)

r0002 Drive state:
Datatype: U16 Unit: - Def: -
P-Group: COMMANDS Max: -
Displays actual drive state.

Settings:
0 Commissioning mode (P0010 != 0)
1 Drive ready
2 Drive fault active
3 Drive starting (DC-link precharging)
4 Drive running
5 Stopping (ramping down)

Dependency:
State 3 is visible only while precharging DC link, and when externally powered communications board is fitted.

You may have been looking at the Active Status Word 1 (memory location "r0052"). If so, then you should read Bit 02 of that word r0052. (Bit 02 = 1 means "Drive Running".

r0052 CO/BO: Act. status word 1
Datatype: U16 Unit: - Def: -
P-Group: COMMANDS Max: -
Displays first active status word of inverter (bit format) and can be used to diagnose inverter status. The display segments for the status word are shown in the "Introduction to MICROMASTER System Pamameters".

Bitfields:
Bit00 Drive ready 0 NO, 1 YES
Bit01 Drive ready to run 0 NO, 1 YES
Bit02 Drive running 0 NO, 1 YES
Bit03 Drive fault active 0 NO, 1 YES
Bit04 OFF2 active 0 YES, 1 NO
Bit05 OFF3 active 0 YES, 1 NO
Bit06 ON inhibit active 0 NO, 1 YES
Bit07 Drive warning active 0 NO, 1 YES
Bit08 Deviation setp. / act. value 0 YES, 1 NO
Bit09 PZD control 0 NO, 1 YES
Bit10 Maximum frequency reached 0 NO, 1 YES
Bit11 Warning: Motor current limit 0 YES, 1 NO
Bit12 Motor holding brake active 0 NO, 1 YES
Bit13 Motor overload 0 YES, 1 NO
Bit14 Motor runs direction right 0 NO, 1 YES
Bit15 Inverter overload 0 YES, 1 NO

Note:
Output of Bit 3 (Fault) will be inverted on digital output (Low = Fault, High = No Fault).

Galaniz · Jul 27, 2012

Thanks Lancie, that is precisely what I needed to know

Lancie1 · Jul 28, 2012

I am glad to hear that you found your VFD run status.

Alina Olteanu · Feb 14, 2013

MicroMaster 440

Hello, Lancie
Please help me.

We have a MicroMaster 440 inverter.

Can I change read-only parameters (for example: r0052 or r0053)?

Thank you

Alina

Lancie1 · Feb 14, 2013

Alina,

No, for any VFD drive memory or status parameter that is designated as "Read-only", you can only look at it or read it, but not change it to something else. You have to use one of the parameters that can be changed by the user, and there are hundreds of those.

What do you need to change? I am sure there is a way.

KalleOlsen · Feb 14, 2013

Alina Olteanu said:
Hello, Lancie
Please help me.

We have a MicroMaster 440 inverter.

Can I change read-only parameters (for example: r0052 or r0053)?

Thank you

Alina

You should spend an hour browsing this parameter list.
http://www.siemens.no/ccmi/bu/ad/pdf/f/MM440_Parameterlist_0106.pdf

Lots of good info.

Kalle

Alina Olteanu · Feb 15, 2013

Thank you very much, Lancie.
I find out what I need.
Those "r" parameters are changing depending on "P" parameters.

Alina

Alina Olteanu · Feb 15, 2013

Hello
Thank you, Kalle, I have that manual, but right now I don't have time to read it page to page. Anyway, I'm planning to learn it by heart

MicroMaster 440 Status Word ZSW

Galaniz

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Lancie1

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Galaniz

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Lancie1

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Alina Olteanu

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Lancie1

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KalleOlsen

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Alina Olteanu

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Alina Olteanu

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