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User Defined M Codes in Sinumerik 840D

Created by: Stef4o at: 8/31/2011 9:19 PM (6 Replies)

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8/31/2011 9:19 PM	Rate (0)
Stef4o Posts: 4 Rating: (0)	Hello all. I am looking for some help with trying to define two M codes (one to energize an output, the other one to cancel it) which I am planning on using in certain places of the part program. The idea is to install air blowoff knives inside our machine and I need to be able to control a 24 VDC air valve via the part program. From the forum threads that I read so far it seems that I am really close to finding the answer I am looking for. In short, we have inserted a SR module inside FC121 (for Channel 1) and have the correct DB21 bits going to set and reset the module.The two M codes are also listed under DB81. When the setting bit is manually toggled in Step 7, we can measure 24 VDC at the appropriate terminal. However, when the setting M code is called in a part program, nothing happens. From what I gathered so far, these M codes have to be defined under Machine Data on the NC side of the controller but this is where I got stuck. I apologize for my non-technical vocabulary above, it is just that I have mechanical rather than electrical background and have very limited knowledge of Siemens Sinumerik systems. Your help is greatly appreciated. Best regards, Stefan Kratounov
Stef4o Posts: 4 Rating: (0)
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9/1/2011 6:30 AM	Rate (0)
ŠΜS Silver Member Joined: 6/7/2010 Last visit: 7/9/2024 Posts: 571 Rating: (37)	Hello, Tell me what M command's you are using for it ? What controller it is?
	Regards, ŠΜS
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9/1/2011 2:26 PM	Rate (0)
Stef4o Posts: 4 Rating: (0)	Hello and thank you for responding. We are trying to use M40 to activate the function and M41 to cancel it. I am also attaching a snapshot of FC121 (for Channel 1) showing Network 43 that we have added to handle these two M codes. M40 and M41 were chosen arbitrarily as there were available to use. To answer your second question - we are using Sinumerik 840D control. Thank you in advance, Stefan Attachment 110901 001.jpg (913 Downloads)
Stef4o Posts: 4 Rating: (0)
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9/1/2011 7:50 PM	Rate (0)
MBA Gold Member Joined: 3/19/2006 Last visit: 4/29/2024 Posts: 594 Rating: (78)	Please use different M Codes this list you can find in Doc on CD 7. Predefined Switching and Auxiliary Functions M0* Programmed stop M1* Optional stop M²* End of program (main program) M30* End of program as M2 M17* End of subroutine M3 Spindle clockwise M4 Spindle counterclockwise M5 Spindle stop M6 Tool change M70 Change to axis mode M40 Automatic gear change M41 Gear stage 1 M42 Gear stage 2 M43 Gear stage 3 M44 Gear stage 4 M45 Gear stage 5

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This contribution was helpful to 1 thankful Users Stef4o

9/2/2011 4:27 PM	Rate (0)
Stef4o Posts: 4 Rating: (0)	Thank you, MBA, I will do that. However, can anyone help with where can I find the manual listing all of the generic G and M codes used by Siemens? I recall coming across this manual several days ago but now I can't find it to save my life. I want to pick two M codes that are not in use in the base 840D control. Best regards, Stefan
Stef4o Posts: 4 Rating: (0)
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9/2/2011 6:42 PM	Rate (0)
Ekalavya Posts: 2964 Rating: (484)	Hello.... Check this Docon WEB link.... https://www.automation.siemens.com/doconweb/content.asp?item=6013&cd=sinumerik_simodrive_04_2010_e&scope=all Regards, Prakash
Ekalavya Posts: 2964 Rating: (484)
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This contribution was helpful to 1 thankful Users Stef4o

9/30/2011 9:12 PM	Rate (0)
Stef4o Posts: 4 Rating: (0)	Guys, sorry for the delayed post but I wanted to thank youfor the suggestions you gave me above. I followed the instructions and based on the bit identification in Chapter 2 of the manual that Ekalavya referenced above, I chose M78 (DB21.DBX203.6 for Channel 1) as my activating signal and M79 (DB21.DBX203.7 for Channel 1) as my cancelling signal. Then we tied them into a SR block in FC121 (for Channel 1) and chose an availableoutput to control our solenoid valve. Once again, thank you very much! Best regards, Stefan Kratounov
Stef4o Posts: 4 Rating: (0)
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