How to perform a S7-300 overall Reset - PLCS.net

jpcor · September 8th, 2006, 05:13 AM

I want to reset my S7-300 to default settings (default MPI settings), not just perform a memory reset.
Does anybody know if the hardware reset is possible on a S7-300?
Thanks
J-P

SimonGoldsworthy · September 8th, 2006, 05:55 AM

I may be wrong, but I don't think you can change the MPI setting via a reset. I have always done this by changing the MPI setting on my PC to match the PLC and then downloading a new hardware config with the MPI setting I want.

jpcor · September 8th, 2006, 06:06 AM

OK, usually I change MPI settings by downloading a new hardware config.
Problem is that for the moment I can no longer connect to the S7-300 using the MPI interface. That's why I would try to reset the communication to default settings by a hardware reset to see if this solves my problem.

SimonGoldsworthy · September 8th, 2006, 06:16 AM

Which CPU is this ? Some CPU's allow you to change from MPI to DP (a 318 for example)

gregoryg · September 8th, 2006, 06:16 AM

As I remember there is only one thing thats retentive in the CPU even you remove memory card, backup battery or remove CPU from PLC rack: CPU port settings. The only way to change it is to download new hardware or put an memory card with changed port parameters into CPU.

jpcor · September 8th, 2006, 06:35 AM

My CPU is a 312C V1.0.3 MPIV

September 8th, 2006, 05:13 AM	#1
jpcor Member Join Date: Sep 2006 Location: Wavre Posts: 3	How to perform a S7-300 overall Reset I want to reset my S7-300 to default settings (default MPI settings), not just perform a memory reset. Does anybody know if the hardware reset is possible on a S7-300? Thanks J-P

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September 8th, 2006, 05:55 AM	#2
SimonGoldsworthy Member Join Date: Mar 2005 Location: England Posts: 1,079	I may be wrong, but I don't think you can change the MPI setting via a reset. I have always done this by changing the MPI setting on my PC to match the PLC and then downloading a new hardware config with the MPI setting I want.

September 8th, 2006, 06:06 AM	#3
jpcor Member Join Date: Sep 2006 Location: Wavre Posts: 3	OK, usually I change MPI settings by downloading a new hardware config. Problem is that for the moment I can no longer connect to the S7-300 using the MPI interface. That's why I would try to reset the communication to default settings by a hardware reset to see if this solves my problem.

September 8th, 2006, 06:16 AM	#4
SimonGoldsworthy Member Join Date: Mar 2005 Location: England Posts: 1,079	Which CPU is this ? Some CPU's allow you to change from MPI to DP (a 318 for example)

September 8th, 2006, 06:16 AM	#5
gregoryg Member Join Date: Aug 2006 Location: Gliwice Posts: 160	As I remember there is only one thing thats retentive in the CPU even you remove memory card, backup battery or remove CPU from PLC rack: CPU port settings. The only way to change it is to download new hardware or put an memory card with changed port parameters into CPU.

September 8th, 2006, 06:35 AM	#6
jpcor Member Join Date: Sep 2006 Location: Wavre Posts: 3	My CPU is a 312C V1.0.3 MPIV

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