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How to set PID parameter for Micromaster 430

Created by: hoangxuyen at: 8/21/2009 6:49 AM (26 Replies)

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8/25/2009 12:08 PM	Rate (0)
hoangxuyen Posts: 13 Rating: (0)
hoangxuyen Posts: 13 Rating: (0)	Last edited by: hoangxuyen at: 8/25/2009 3:50 PM
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8/25/2009 3:34 PM	Rate (0)
hoangxuyen Posts: 13 Rating: (0)
hoangxuyen Posts: 13 Rating: (0)	Last edited by: hoangxuyen at: 8/25/2009 3:58 PM
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8/25/2009 3:47 PM	Rate (0)
hoangxuyen Posts: 13 Rating: (0)	Dear Mr RBM! Thank you so much for your explanation! You have explained for me very clear about CDS and DDS. As you say I can see that the 0^th data set is Parameter that have no character “[ ]” or (P0371[0] = P0371). Before you explain me I just understand that: Numbers prefixed with an “r” (example. R2379) indicate that the parameter is a “read-only” parameter, which displays a particular value but cannot be changed directly by specifying a different value via this parameter. After reading all of your detailed explanation I can understand that: Numbers prefixed with “r” is not only for “read only value” butthevalue of it(status bits of it) can be use to control output. In other words we can understand that parameter prefixed with an “r” can be used as a “data base” for us use status bit of it for purpose logic control. I see as your explaination then the value 2379:1 is just bit 1 of r2379, is it right? In the manual document parameter Value for DOUT1 and DOUT2 just is: 52.0 Drive ready 0 Closed 52.1 Drive ready to run 0 Closed 52.2 Drive running 0 Closed 52.3 Drive fault active 0 Closed 52.4 OFF2 active 1 Closed 52.5 OFF3 active 1 Closed 52.6 Switch on inhibit active 0 Closed 52.7 Drive warning active 0 Closed 52.8 Deviation setpoint/actual value 1 Closed 52.9 PZD control (Process Data Control) 0 Closed 52.A Maximum frequency reached 0 Closed 52.B Warning: Motor current limit 1 Closed 52.C Motor holding brake (MHB) active 0 Closed 52.D Motor overload 1 Closed 52.E Motor running direction right 0 Closed 52.F Inverter overload 1 Closed 53.0 DC brake active 0 Closed 53.1 Act. freq. r0021 > P2167 (f_off) 0 Closed 53.2 Act. freq. r0021 > P1080 (f_min) 0 Closed 53.3 Act. current r0027 >= P2170 0 Closed 53.4 Act. freq. r0021 >= P2155 (f_1) 0 Closed 53.5 Act. freq. r0021 < P2155 (f_1) 0 Closed 53.6 Act. freq. r0021 >= setpoint 0 Closed 53.7 Act. Vdc r0026 < P2172 0 Closed 53.8 Act. Vdc r0026 > P2172 0 Closed 53.A PID output r2294 == P2292 (PID_min) 0 Closed 53.B PID output r2294 == P2291 (PID_max) 0 Closed All of it have no value 2379:1, 2379:2 I hope that in Practice the parameter P0731, P0732 of Inverter MM430 will have two of that value. I believe in your conclusion because I also have read one section of manual document as flowing: r2379 CO/BO: Motor staging status word Min: - Datatype: U16 Unit: - Def: - P-Group: TECH Max: - Output word from the motor staging feature that allows external connections to be made. Bit 0 switches on Motor 1. Bit 1 switches on Motor 2. Bit 2 switches on Motor 3. Bitfields: Bit00 Start motor1 0 NO 1 YES Bit01 Start motor2 0 NO 1 YES Bit02 Start motor3 0 NO 1 YES All of parameters I can see at diagram picture of P2378[3] Motor staging frequency f_st [%] After I try setting parameter for the MM430, Though the result is success or not I also inform to you, simple that I would like to share the my success and unsuccess to you. You have helped me so many, I very appreciate with your heart. Thank you one again Best regards Hoang Quoc Xuyen
hoangxuyen Posts: 13 Rating: (0)	Last edited by: hoangxuyen at: 8/25/2009 4:02 PM
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8/26/2009 8:27 AM	Rate (0)
RBM Bronze Member Joined: 8/21/2008 Last visit: 10/15/2024 Posts: 141 Rating: (6)	Dear Mr Hoangxuyen, Nice to hear that you are clear about certain things. What you said is correct. The parameters starting with "r" are only readable values. You cant change in that parameters. It displays the status or show some useful values like current, torque or staus bit. The DOUT havea range from 0:0 to 4000:0. Hence there must be a value of 2379.1 / 2379.2 for the parameter P0731[0] and P0732[0]. Lets hope this will work out. waiting to hear ur success !!! rgds, RBM

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8/29/2009 2:05 PM	Rate (0)
hoangxuyen Posts: 13 Rating: (0)	Dear Mr RBM! Thank you very much for your help recently. I have met some problems, I would like to ask you some question as following: I have set all PID necessary parameter as your direction as below: Since I'm using a current signal as 4-20mA for my feedback signal, so that I scale the analog input 1, or analog input 2 by set parameters are: P0756 = 2 (unipolar current source) P0757 = 4 (minimum current input, in my case its 4mA) P0758 = 0 % P0759 = 20 (maximum current is 20 mA) P0760 = 100 % P1000 = 0 P2200 = 1 (Enable PID Controller) P2231 = 1 (to store your setpoint entered in P2240) P2235 = 19.D (to increase the speed by pressing "UP" via BOP-2) P2236 = 19.E (to decrease the speed by pressing "DOWN" via BOP-2) P2240 = 60% (Your Set-Point) P2253 = 2250 (to choose the set-point ) P2257 = 20 (ramp-up time) P2258 = 20 (ramp-down time) P2264 = 755.0 (to select the feedback is from analog input 1) P2264 = 755.1 (to select the feedback is from analog input 2) P2267 = 100 (maximum value of PID feedback) P2268 = 0 (minimum value of PID-feedback) P2271 = 0 P2291 = 100 (PID output limit.) P2292 = 0 (if the motor requires to run a speed higher than say 20Hz you shoud set it here) After I set all parameter I save by setting parameter P3900 = 3. And after setting I have checked again all parameter have correct value as I desire. The problem that I have met are:1) After scaling Analog signal input in a correct wayand all parameter for PID control were set as above, I have read the value of r2272 (CO: PID scaled feedback) and see that the value of r2272 was wrong. When I set Analog input = 4mA then I read parameter was r2272 = 12% ( if correct it must be 0% because the analog input was scaled). I have tested with entire 2 analog input 1 and 2 by set : P2264 = 755.0 (to select the feedback is from analog input 1) P2264 = 755.1 (to select the feedback is from analog input 2) and it was still have the wrong value. Could you please show me the way to solve this problem 2) I couldn’t know how to set the parameter in the index part. Example as: I want to know the way to set parameters as: Index: P0756[0] : Analog input 1 (ADC 1) P0756[1] : Analog input 2 (ADC 2) Index: P2253[0] : 1st. Command data set (CDS) P2253[1] : 2nd. Command data set (CDS) P2253[2] : 3rd. Command data set (CDS) I couldn’t make the appearance of characters after each index parameter as [0], [1], [2] or [3] to set the value in…! . I don’t know that if I use BOP2 then I can set index parameter or not? I wonder whether I must use a PC software to set index parameter part or not?Could you please show me the way to set these kind of parameter?I am looking forward to your direction.Best regardsHoang Quoc Xuyen.
hoangxuyen Posts: 13 Rating: (0)
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8/30/2009 6:30 AM	Rate (0)
RBM Bronze Member Joined: 8/21/2008 Last visit: 10/15/2024 Posts: 141 Rating: (6)	Dear Mr Hoangxuyen, I hope that you had selected the DIP switch (mentioned inP0756 in the paramaeter list)as "ON" position. There are 2 DIP switches, one for analog input 1 and other for analog input 2. For current signal feedback you need to place that DIP switch in up-direction (ie. ON) Now dealing with Analog input scaling: (only mentioning the one required for analog input scaling, rest all parameters remains the same) If you are using analog input 1 or 2 as your feedback, then pls chk these values. Analog Input 1 Analog Input 2 P0756[0] = 2 P0756[1] = 2 P0757[0] = 4 P0757[1] = 4 P0758[0] = 0 P0758[1] = 0 P0759[0] = 20 P0759[1] = 20 P0760[0] = 100 P0760[1] = 100 P2253[0] = 2250 P2253[0] = 2250 P2264[0] = 755.0 P2264[0] = 755.1 P2253 & P2264 are set on 0th data set. (for both the cases). But the scaling parameters are set in different data sets. After seting theses parameter can you please check two parameters? these are readable parameters just to ensure what your data receiving are correct. r0752[0] (Act. Input of ADC) for Analog I/P -1 r0754[0] (Act. ADC value after scaling) Analog I/P -1 or if you are using analog input 2, then r0752[1] (Act. Input of ADC) for Analog I/P -2 r0754[1] (Act. ADC value after scaling) Analog I/P -2 Here,you see clearly how much current you are providing to the drive. And how is the scaling done. If you check the P0752 in Parameter list, a detailed diagram is given. Each and every step is clearly mentioned via block diagram. I think it will be useful to you. To be on the safer side please try to do every thing with Analog Input-1 to avoid confusion. Ihope this will work. Please reply !!!. rgds, RBM

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8/30/2009 8:30 AM	Rate (0)
hoangxuyen Posts: 13 Rating: (0)	Dear Mr RBM! I had selected the DIP switch (mentioned in P0756 in the paramaeter list) as "ON" position. But I think that maybe the DIP Switch has not contacted well so that the signal remain unchanged. ( I will select the DIP switch again and check it one time again) After seting theses parameter I will check two parameters below: r0752[0] (Act. Input of ADC) for Analog I/P -1 r0754[0] (Act. ADC value after scaling) Analog I/P -1 - Maybe my english is not good so you misunderstand what I want to ask you: - All I would like to ask you about index parameter are: - I couldn’t make the appearance of characters [] after each index parameter as [0], [1], [2] or [3] to set the value in…! . - I don’t know that if I use BOP2 then I can set index parameter parts or not? - I wonder whether I must use a PC software to set index parameter part or not? - Can I use BOP2 to set Index Parameter? - How to see [0], [1], … character on BOP2? - Could you please show me the way to set these kind of parameter? I am looking forward to your direction. Best Regards Hoang Quoc Xuyen
hoangxuyen Posts: 13 Rating: (0)
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8/30/2009 8:42 AM	Rate (0)
hoangxuyen Posts: 13 Rating: (0)	Dear Mr RBM! I had selected the DIP switch (mentioned in P0756 in the paramaeter list) as "ON" position. But I think that maybe the DIP Switch has not contacted well so that the signal remain unchanged. ( I will select the DIP switch again and check it one time again) After seting theses parameter I will check two parameters below: r0752[0] (Act. Input of ADC) for Analog I/P -1 r0754[0] (Act. ADC value after scaling) Analog I/P -1 - Maybe my english is not good so you misunderstand what I want to ask you: - All I would like to ask you about index parameter are: - I couldn’t make the appearance of characters [] after each index parameter as [0], [1], [2] or [3] to set the value in…! . - I don’t know that if I use BOP2 then I can set index parameter parts or not? - I wonder whether I must use a PC software to set index parameter part or not? - Can I use BOP2 to set Index Parameter? - How to see [0], [1], … character on BOP2? - Could you please show me the way to set these kind of parameter? I am looking forward to your direction. Best regards Hoang Quoc Xuyen
hoangxuyen Posts: 13 Rating: (0)	Last edited by: hoangxuyen at: 8/30/2009 8:48 AM
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8/30/2009 8:49 AM	Rate (0)
RBM Bronze Member Joined: 8/21/2008 Last visit: 10/15/2024 Posts: 141 Rating: (6)	Dear Mr.hoangxuyen, If you are asking how to view/change different indexes ??? Lets take an example say,P0756 your BOP display will be having P0756.0 = 2 right??? and the only 0756 will be highlightened, ie, when you press UP/Down key 0756 will be changed rite?? (P0756.0 = 2 ) Now if you press the "Fn" key in the BOP the highlightened display will shift from P0756 to index"0" Now uising your Up/Downkey you can change the index variables. Each time it will comes as P0756.0= 2 P0756.1= 2 P0756.3= 2 Now if you press again you "Fn" key in BOP, you can shift from index to the value part. and pressing UP/DOWN key changed the value P0756.0 = 2 P0756.0 = 1 I hope is this the issue u are facing???

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2/23/2016 5:35 AM	Rate (0)
rockymultani Posts: 4 Rating: (0)	Hello RBM, I read your response regarding the PID control. I have a 10 hp MM440 driving a cooling fan for a generator. When the generator temperature goes above the 82 degree celsius i want the drive to regulate the temperature by increasing the speed of the drive. I need to set my setpoint at 82 degree celcius and i want to maintain that temperature. The Analog input is a 0-100 degree ( 4-20 mA ) RTD. Q.no 1 How do i do the exact setpoint ( in percent or other way)? Q,no 2 How can i display the temperature at the main screen for display ? Your help will be much appreciated.
rockymultani Posts: 4 Rating: (0)
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