Good morning forum,

I cant seem to adjust the time on the plc every time i go into online and diagnostics adjust time it does it till i reset the cpu and then it goes back to 2004.

Has anyone come across this before?

hi Jackcaress,

thats what I expect when I reset the CPU...

Have a look in the S7-1200 system manual, chapter 15.5:

unknown user

Resetting to factory settings

The module switches to STOP mode if necessary, and it resets the factory settings. The

CPU perfoms the following actions:

With memory card installed in CPU 

• Clears the diagnostics buffer

• Resets the time of day

• Restores work memory from the memory card

• Sets all operand areas to configured initial

values

• Sets all parameters to their configured values

• Retains or deletes the IP address based on

the selection you made. (The MAC address is

fixed and is never changed.)1

• Deletes the control data record (Page 155), if

present

Without memory card installed in CPU

• Clears the diagnostics buffer

• Resets the time of day

• Clears the work memory and internal load

memory

• Sets all operand areas to configured initial

values

• Sets all parameters to their configured values

• Retains or deletes the IP address based on

the selection you made. (The MAC address is

fixed and is never changed.)1

• Deletes the control data record, if present

hope this helps,

regards,

 I find this strange because i have done a factory data reset on the device and it still says 2004 and the wrong time so im not sure what could be happening, i mean i need it to be connected to a ktp 600 basic hmi for a weekly timer so the time needs to be perfect,

Thanks for your quick responce

Jackcaress

 I find this strange because i have done a factory data reset on the device and it still says 2004 and the wrong time so im not sure what could be happening, i mean i need it to be connected to a ktp 600 basic hmi for a weekly timer so the time needs to be perfect,

Thanks for your quick responce

 factory-settings means also that the time is resetted to 2004.

How could the CPU know the actual time with its factory settings?

What you need is a kind of NTP-synchronizing, that synchronizes with an NTP-server. 

If it is only neccessary to synchronize with panel, this FAQ seems to be perfect for you:

Clock synchronization between a HMI operator panel and a SIMATIC PLC

hope this helps,,

regards,