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Siemens 840D USB call function

Created by: BDias at: 4/15/2013 7:28 PM (17 Replies)

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4/15/2013 7:28 PM	Rate (0)
BDias Posts: 9 Rating: (0)	Hello, Hi I'm a current masters student. As part of my master’s thesis I am working on theSiemens 840D controller and in relation to this I had a few queries, and it would be great if I could get some inputs. Basically as part of the project I intend on devising a new probe that can used to measure thicknesses. The prototype for the same has also been prepared. Now, we intend on interfacing it with the machine. To interface the tool , we are trying to make use of Bluetooth USB’s, so that when the probe takes the measurements, these values are transmitted to a remotely mounted laptop using wireless communication for analysing the data. Once anlysed the laptop updates a .spf file and sends it to the siemens 840D controller using a bluetooth USB. To perform the above, I had the following doubts:- 1. 1.Is it possible to use a Bluetooth USB with the Siemens 840D controller? Since it isn’t a Windows based system, how do we get the drivers installed? Will the drivers for this bluetooth device be different from an ordinary USB? 2. 2.Additionally if we use a normal USB stick in the Siemens 840D slot, what G routines will be needed to call a subroutine program(.spf) from the USB? Having browsed through the Siemens manual, I tried using the "EXTCALL" function followed by the path extension(G:\USB\....), however it gives me an error. Could you provide some inputs on the kind of function that can be used to call for the subroutine program(.spf) from an USB. I just need basic variables to be transmitted. For eg. A=500(which is the probe measurements). This 500 needs to be tranmitted into some storage location of the siemens 840D like R1001 etc. 3. Can the Read/Write function be used when reading/writing data from a USB and not the local drive? It would be of great help if you could provide me any sought of assistance on the above. Looking forward to your reply. Kind Regards, Dias
BDias Posts: 9 Rating: (0)	Last edited by: BDias at: 4/15/2013 7:29 PM
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4/17/2013 2:07 PM	Rate (1)
APC Tech Team Posts: 391 Rating: (50)	Hello, please provide type and version of the 840D. Is it a 840D powerline or solution line ? Has the operator panel got a PCU50 or a TCU ? Which software version is installed ? Press in the HMI the softkey "Diagnosis" and then "Version" Without these informations I can only say that: 1. you will have some chances to make this Bluetooth device working with Sinumerik onlyif you have a (recent)PCU50as operator panel. The PCU50 comes with Windows XP Pro for embedded systems. You can try to install the drivers for this device on the PCU50. Normally the drivers for such Bluetooth devices are provided by the Bluetooth device manufacturer and must be installed. The installation of additional devices is generally not supported. This means they might work but Siemenscan give no guaranteebecause it has not tested them. Soit is the customer's responsibility to make sure thatthese devices do not interfere with the functioning of the PCU50 standard hardware and software. If you intend to install this device, I suggest to make a complete software backup of the PCU50 before. 2. extcall with USB works only with the latest NC software versions. On which USB port have you connected the USB stick ? On the operator panel front ? Please answer the questions at the beginning. Another possibility is to connect via ethernet cable the external PC to the PCU50, or directly to the NC if the operator panel has a TCU instead of a PCU50. Then you can configure the so-called "logical drives" to access network shared folders with EXTCALL.
APC Tech Team Posts: 391 Rating: (50)
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4/22/2013 2:23 PM	Rate (0)
BDias Posts: 9 Rating: (0)	Thanks APC Tech Team for the reply. Having gone through your reply along with a few other try outs, I understand that this mode of communication might be a bit tricky. Hence I was trying to get this application done using a Rs232 interface instead of a bluetooth USB. In relation to this I have a following query. Is there any NC routine(like Extcall) which can be used to draw information( like thickness values) from the laptop and save these in predefined controller storage locations using the RS 232 communication interface? Looking forward to your reply.
BDias Posts: 9 Rating: (0)
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4/23/2013 12:53 PM	Rate (1)
APC Tech Team Posts: 391 Rating: (50)	Hi, you have two options with RS232: 1) if you have a PCU50, you can transfer NC Programs via the serial interface of the PCU50. Not all PCU50s have an integrated serial interface though, so you should check this. If you have a TCU instead of a PCU50 and a 840D sl NCU 7x0.2, you can add a COM (serial) interface module to the NCU for NC program transfer. http://support.automation.siemens.com/WW/view/en/39859725 2) You can add a serial interface to the Sinumerik PLC, for example the CP340 to transfer data to the PLC. This only makes sense if the data quantity is small and you do not need to forward it from the PLC to the NC. http://support.automation.siemens.com/WW/view/en/21363320 The computer transferring the data needs an application for serial data transfer such as HyperTerminal, Siemens PCIN, or similar, also self-made applications.
APC Tech Team Posts: 391 Rating: (50)
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5/14/2013 1:05 AM	Rate (0)
BDias Posts: 9 Rating: (0)	Dear APC Tech Team, With regards to your response I have researched on the use of RS 232 for my current project. However I had one more concern:- Unlike in the case of a USb stick the RS232 is more of a communication channel rather than a external drive. Hence will it possible to draw the probe values that will be analysed by the laptop using labview, into the siemens contoller? I mean in the case of a USb the extcall fuction can be used followed by the particular path in which the subprogam is located, i.e. EXTCALL ("G:/...). However in the case of a RS232 coomunication how is it possible to call these values from the laptop using a NC routine. Will a EXTCALL function suffice? If yes what would be the syntax? If not, is there any other way of drawing information. By the way to answer your previous question, the Siemens 840D being used by us, has a PCU50. Looking forward to your help. Cheers, Dias
BDias Posts: 9 Rating: (0)
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5/21/2013 9:37 AM	Rate (0)
APC Tech Team Posts: 391 Rating: (50)	Hello, I would drop the option of RS232. Maybe the easiest way is to share a folder on the laptop PC (where you will put your .SPF file)and connect it via ethernet to the PCU50. Then the operator on the machine can transfer files from this shared folder to the local storage (PCU50 hard disk or NC internal memory). You can also use EXTCALL both with USB sticks or network shared folders, please check these links: https://www.automation.siemens.com/doconweb/pdf/SINUMERIK_SINAMICS_02_2012_E/FB1sl.pdf?p=624#page=624&view=FitBH,0&pagemode=none https://www.automation.siemens.com/doconweb/pdf/SINUMERIK_SINAMICS_02_2012_E/BHUsl.pdf?p=244#page=244&view=FitBH,0&pagemode=none Please consider the warnings about EXTCALL. Is it really needed ? It was meant to execute files that are too big to be loaded into the internal memory of the NC (SRAM). Is your file so big ?
APC Tech Team Posts: 391 Rating: (50)
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7/8/2013 3:09 PM	Rate (0)
BDias Posts: 9 Rating: (0)	Dear APC team, I needed a certain with regards to the NC routines. In my experiment, the variables from the .spf file on the shared folder are extracted using the EXTCALL function and stored in the GD[] variables. for eg in my case:- GD[1]--- corresponds to the thickness value. Now in every iteration, a new GD[1] value will be overwritten. Since I need all the probed values I intend to transmit the GD[1] value to the R variables sequentially. So, consider my 1st probed value as 4.523. Now this value will be extracted into the GD[1] variable in the 1st iteration. This value is then written into the R1 variable so that R1= 4.523 Now in the second iteration, if the thickness value is 4.167. Hence when extracted, GD[1]= 4.167, which will have to be written in R2, so that R2= 4.167, and so on. Could you help with the NC routines to enable this sought of a transfer/storage? Looking forward to your help. Cheers, B Dias.
BDias Posts: 9 Rating: (0)
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7/8/2013 4:25 PM	Rate (0)
APC Tech Team Posts: 391 Rating: (50)	BDias Dear APC team, GD[1]--- corresponds to the thickness value. Now in every iteration, a new GD[1] value will be overwritten. Since I need all the probed values I intend to transmit the GD[1] value to the R variables sequentially. So, consider my 1st probed value as 4.523. Now this value will be extracted into the GD[1] variable in the 1st iteration. This value is then written into the R1 variable so that R1= 4.523 Now in the second iteration, if the thickness value is 4.167. Hence when extracted, GD[1]= 4.167, which will have to be written in R2, so that R2= 4.167, and so on. R[count iteration] = GD[1] example: FOR R0 = 0 TO 20 R[R0] = R0 ENDFOR
APC Tech Team Posts: 391 Rating: (50)
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7/11/2013 2:26 PM	Rate (0)
BDias Posts: 9 Rating: (0)	Thanx APC Tech Team, The solution seems to work just as required. I have a demonstration to my final sponsorers in 2 weeks time. My supervisors have informed me that the means of sharing the files via a LAN connection between the laptop and the siemens controller needs to be changed due to certain security reasons. They've suggested me to go in for a USB to USb data tranfer cable like this one:- http://www.maplin.co.uk/usb-data-transfer-cable-221132 One end of the cable will be connected to the laptop while the other end to the Siemens USB port on the front panel. Before going in for something like this, I would like to know if there would be any compatibility issues with the Siemens? Secondly will any additional drivers be needed to be installed, we have a strict No policy to installing new software into the system? Will the siemens controller recognise the laptop as an external source. Looking forward to your reply. Cheers, Dias.
BDias Posts: 9 Rating: (0)
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7/11/2013 4:51 PM	Rate (0)
APC Tech Team Posts: 391 Rating: (50)	BDias I have a demonstration to my final sponsorers in 2 weeks time. My supervisors have informed me that the means of sharing the files via a LAN connection between the laptop and the siemens controller needs to be changed due to certain security reasons. which security reasons exist if only the laptop and the control with a net cable are connected ? BDias They've suggested me to go in for a USB to USb data tranfer cable like this one:- http://www.maplin.co.uk/usb-data-transfer-cable-221132 this solution is not tested by Siemens
APC Tech Team Posts: 391 Rating: (50)
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