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MotL not starting

Created by: Idir at: 12/15/2015 1:18 PM (15 Replies)

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12/21/2015 8:30 PM	Rate (0)
Idir Posts: 163 Rating: (2)	Thank you guys for the help. I think now the connections are good. I actually have a real motor that's why I wanted to use Pv_In. But what should I connect to Pv_out? Start or Run? Start goes High as soon as I start the CPU. but Run goes High only when I put I2.0 to "1". What is then the difference between Start and Run? and why is RedyToSta relevant? I also noted that this one goes High only on automatic mode. Best Regards Attachment runst.PNG (196 Downloads)
Idir Posts: 163 Rating: (2)
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12/22/2015 7:32 AM	Rate (0)
Oreca Platinum Expert Joined: 3/14/2008 Last visit: 11/19/2024 Posts: 2134 Rating: (954)	Idir Thank you guys for the help. I think now the connections are good. I actually have a real motor that's why I wanted to use Pv_In. But what should I connect to Pv_out? Start or Run? Start goes High as soon as I start the CPU. but Run goes High only when I put I2.0 to "1". What is then the difference between Start and Run? and why is RedyToSta relevant? I also noted that this one goes High only on automatic mode. Best Regards Hello Idir, We're getting there... OK, you have a real motor. and so you have a real input as well?? Is I2.0 the feedback run of the motor? Or is it a signal to start the motor? I was thinking the input was the feedback run and so you don't use it to start the motor....Apparently, it is a start signal for the motor. Correct? I think you mean PV_Out of the OutStart block? In that case, you have it correct.. The signal: Start from the motor block is meant to start the motor by activating a digital output. When you have your feedback run signal (FbkRun=1), then the signal Run is set to "1" as well as FbkRunOut of the motor block. And RdyToStart is used to indicate the motor can be set to run in automatic mode. You can use that signal in a SFC or so to check if all equipment is ready to go.. It is made up of the following conditions: - No group error - No interlock active - No forced operating mode or manipulated value - No rapid stop - Block is in automatic mode - Restart waiting time has expired
	If I could help you, you can use the RATE button. Thank you. Prospact Netherlands...your PCS7 and PCS neo Expert Topic: PCS7 Complete Overview
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12/22/2015 9:53 AM	Rate (0)
mark1507 Platinum Expert Joined: 6/23/2008 Last visit: 11/13/2024 Posts: 1168 Rating: (283)	Hello Idir, we need to know what is the Signal "I 2.0 Start" ? Is it a start command from an external start button wired to an digital Input ? Do you have an digital input for 'feedback run' ? Like I said, this signal is usually comming from an auxillary contact of the main contactor. It is giving the information to the MotL block if the main contactor really switched after giving a command. That means; If you switch on the motor the signal FbkRun must be '1' within the monitoring time. After switching the motor off the signal 'FbkRun' must be '0' within in the monitoring time. If the 'FbkRun' is not changing according to the command (output 'Start' of MotL), the block will give an error (Error Feedback Run). This functionallaty is for detection e.g. a defective main contactor. If you don't have a digital input for 'FbkRun' then you can deactivate this functionallaty by 'Monitor' = '0'. Obviously you did that already...anyhow, it's no good idea to wire a signal in parallel to a command and to FbkRun. Also I would like to recommend to get familar with the different modes of the block 'MotL' (Manual, Auto, Local) because you should not use the inputs 'StartMan' and 'StopMan'. This Inputs are only for switching the motor by the OS from the faceplate.
	"Expert" does not necessarily mean Siemens employee. Please cross-check your requirements always with official Siemens documentation. Also "Experts" are pleased about feedback. Please don't send support requests as PM. Questioners who don't follow up their thread will be put to my list of users to be ignored.
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12/22/2015 8:06 PM	Rate (0)
Idir Posts: 163 Rating: (2)	Thanks guys for answering. Yes, I2.0 is the start from a toggle switch (or push button) to give the start signal for the motor. What is the essence of the Fbkrun input signal? both in real life and in CFC? I will actually run the servo motor using a Simotion D. Does it make any difference? Kind Regards,
Idir Posts: 163 Rating: (2)
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12/23/2015 9:04 PM	Rate (0)
mark1507 Platinum Expert Joined: 6/23/2008 Last visit: 11/13/2024 Posts: 1168 Rating: (283)	Hello Idir, Idir What is the essence of the Fbkrun input signal? both in real life and in CFC? Please see my answers in my 1st and 2nd post in this thread. Idir I will actually run the servo motor using a Simotion D. Does it make any difference? In regard to a feedback signal? Also with an inverter you usually process a feedback signal in your software for that inverter/motor. How do you connect the inverter to your PLC, by I/Os or via a fieldbus like PROFINET or PROFIBUS? If you operate it via I/Os you should wire a digital output of the inverter to an input of your PLC (ET200x; x= M,S or SP) containing the information 'feedback run'. If you operate the inverter via fielbus the information is included in the telegram (status word 1) from inverter to PLC. You need to wire the signal in CFC from the driver block to 'FbkRun' of the motor block. But for an inverter you should use the block 'MotSpdCL' if you like to change the speed by your programm or from OS. PCS7 comes along also with templates for inverter driven motors: In e.g. 'MotorSpeedControlled' for an inverter driven motor by I/Os or 'Drive' for an inverter driven motor by fieldbus.
	"Expert" does not necessarily mean Siemens employee. Please cross-check your requirements always with official Siemens documentation. Also "Experts" are pleased about feedback. Please don't send support requests as PM. Questioners who don't follow up their thread will be put to my list of users to be ignored.
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12/26/2015 2:43 PM	Rate (0)
Idir Posts: 163 Rating: (2)	Hello, I would like to use both of them the distributed I/O and Ethernet. Also I have an off-tpoic question. [snip] ... Regards, ------------ new question splitted to: Simatic Thin Client and Simatic Multi Panel. Which one will be my OS?
Idir Posts: 163 Rating: (2)	Last edited by: CS Moderator at: 12/28/2015 9:40:45 AM new question split to a seperate thread
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