Hi Daniel:

I'm trying to understand this case in order to implements a similar mechanism of data retainig when power off. So my question is how the device now that there is an power off situation to proceed with  the pertainig data storage?. Is an event trigggered some way?Thanks

Thanls in advance

dchartier

Hello DSI;

Read this presentation about the power supply you are checking out, it gives an explanation of the 20 ms buffering time parameter:

https://www.totallyintegratedautomation.com/2017/08/power-buffer-reduces-downtime/

"The PS 60W 24/48/60V DC HF system power supply with buffer supports the power supply to the backplane of the S7-1500 CPU during power failures just long enough to make all of the CPU data retentive.

This module – which has no battery and therefore requires no maintenance – provides a power buffer so the CPU has time to write current information into memory. This enables the CPU to store the entire work memory (data) to non-volatile memory so the program will restart in the same operating status."

Hope this helps,

Daniel Chartier 

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Split from Retain memory buffer time of 6ES7505-0RB00-0AB0.

Did you already download the device manual?

I found an example that goes back to Portal V14 SP1 here:

https://cache.industry.siemens.com/dl/files/400/109746400/att_916007/v1/s71500_power_module_ps_60w_24_48_60vdc_hf_manual_en-US_en-US.pdf

Says it throws a diagnostic event which can be intercepted in the Diagnostics Error Interrupt OB (OB82).  The module will throw external power lost event.  However, the manual also states you need to enable that diagnostic event during hardware configuration - and the manual explains more about that setting.

During that 20ms, if the PLC and PS module are properly configured, the PS accepts all the PLC data and stores it until the PLC starts up again.

Refer to this FAQ on how to configure everything:

https://support.industry.siemens.com/cs/document/109746177

janavax

 Hi Daniel:

I'm trying to understand this case in order to implements a similar mechanism of data retainig when power off. So my question is how the device now that there is an power off situation to proceed with  the pertainig data storage?. Is an event trigggered some way?Thanks

Thanls in advance

dchartier

Hello DSI;

Read this presentation about the power supply you are checking out, it gives an explanation of the 20 ms buffering time parameter:

https://www.totallyintegratedautomation.com/2017/08/power-buffer-reduces-downtime/

"The PS 60W 24/48/60V DC HF system power supply with buffer supports the power supply to the backplane of the S7-1500 CPU during power failures just long enough to make all of the CPU data retentive.

This module – which has no battery and therefore requires no maintenance – provides a power buffer so the CPU has time to write current information into memory. This enables the CPU to store the entire work memory (data) to non-volatile memory so the program will restart in the same operating status."

Hope this helps,

Daniel Chartier 

 

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Split from Retain memory buffer time of 6ES7505-0RB00-0AB0.