[?]: S7-300 CPU314C-2DP LED Status

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amit
Posts: 53
Joined: Thu Apr 23, 2009 2:12 pm
Location: India

[?]: S7-300 CPU314C-2DP LED Status

Post by amit » Sat Aug 11, 2012 9:02 am

Hi Friends,
what should be the status of 5VDC LED in run mode.
In manual Its status in all fault conditions is given but not given for run mode.
CPU is 314C--2DP with MLFB 6ES7314-6CH04-0AB0.

regards

Amit
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kriztof
Posts: 96
Joined: Fri Nov 16, 2007 3:18 pm
Location: Europe

Re: S7300 CPU314C-2DP LED Ststus

Post by kriztof » Sun Aug 12, 2012 8:26 am

DC5V led means that there is 5V power for CPU and bus. IMO it is pure hardware signal, it doesn't depend on CPU state.
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amit
Posts: 53
Joined: Thu Apr 23, 2009 2:12 pm
Location: India

Re: S7300 CPU314C-2DP LED Ststus

Post by amit » Sun Aug 12, 2012 9:31 am

So it should be on in the all CPU states.
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kriztof
Posts: 96
Joined: Fri Nov 16, 2007 3:18 pm
Location: Europe

Re: S7300 CPU314C-2DP LED Ststus

Post by kriztof » Sun Aug 12, 2012 5:28 pm

I've checked my S7-314 and S7-315-2DP, and, yes it looks that DC5V is hardware signal. I'm not electronic specialist, but, for me there is DC/DC converter that changes 24VDC (power supply voltage) to 5VDC (logic supply voltage), and probably DC5V led is directly (or through some resistor) connected to the bus.
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