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M function timeout

Created by: owenfred at: 7/28/2008 7:13 PM (3 Replies)

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7/28/2008 7:13 PM	Rate (0)
owenfred Posts: 30 Rating: (1)	I have a machine with a siemens 840D powerline. One of the m functions turns coolant on that washes the part in the parts catcher. Every once in a while the machine hangs with the coolant still on in the middle of the night and we come in to coolant all over the floor. I would like to know if there is a way to add a timeout so it will always turn off after 20 seconds. The manufacturer said I would have to hard wire a relay but it seems like this should be possible inside the m function itself. Thanks for your help, Owen
owenfred Posts: 30 Rating: (1)
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7/28/2008 7:25 PM	Rate (0)
Sparcky Posts: 6 Rating: (0)	Hello, I think there will be a modification that can be done in the STEP 7, so when the machine hangs up the coolant cannot come on, or stay on in your case. Just a little sugestion....good luck.
Sparcky Posts: 6 Rating: (0)
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7/29/2008 11:16 AM	Rate (1)
SteveJ Posts: 328 Rating: (29)	Dear Sir It would be possible to modify the PLC program to control coolant in the manner you require. But, This would require someone with a knowledge of Step 7 programing to carry out the modification. Your machine OEM should be able to help you with this, Failing that, I would suggest you contact your local Siemens service office, They would be able to make these modifications. Regards SteveJ
SteveJ Posts: 328 Rating: (29)
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8/2/2008 12:28 AM	Rate (0)
Pee El Sea Gold Member Joined: 1/19/2008 Last visit: 5/25/2023 Posts: 967 Rating: (58)	Hi, Do you know the M codes to switch the coolant on and off? What is the error code when the machine hangs.

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