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S7 - 1200 goes to stop (EMC?)

1/3/2011 12:29 PM	Rate (0)
Oscar_83PL Bronze Member Joined: 10/22/2008 Last visit: 10/14/2024 Posts: 369 Rating: (5)	Hi, For some time we have probelm with s7-1200 1214 230 VAC PLC. In different devices (control processes) when PLC out relay goes off also whole PLC resets itself (something like after power on - it initialize). But what is more annoying is that from time to time PLC turn to error mode (red light lit). [code] Incoming event 3/10/1970 7:02:31.884 PM Details on event: 6 of 15; Event ID:16#02:401A CPU info: Serious firmware exception (not relevant for user, system code: 16#00644A4E) CPU switches from RUN to DEFECTIVE state [/code] //// [code]Details on event: 13 of 14; Event ID:16#02:401A CPU info: Serious firmware exception (not relevant for user, system code: 16#00644A4E) CPU switches from RUN to DEFECTIVE state [/code] To output is connceted siemens contacor 5,5kW. There was an idea that the problem may be caused by surge of coils. However contactor RC modules have not solved the defect. Have you ever had problem even little simmilar to mine? best regards
	Last edited by: Oscar_83PL at: 1/3/2011 12:30 PM Last edited by: Oscar_83PL at: 1/3/2011 12:30 PM
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1/3/2011 3:10 PM	Rate (0)
Wright Posts: 7 Rating: (0)	Include external suppression circuits on each relay output as described in the S7-1200 System Manual.Suppression circuits for relay outputs must be provided externally and must match the load type.For more information regarding suppression circuits, refer to the S7-1200 System Manual http://support.automation.siemens.com/WW/view/en/36932465. In the 11/2009 version, see the Installation chapter, section 2.3 Wiring Guidelines. Another recommendation is to connect the "M" terminal of the CPU sensor supply to the chassis ground terminal of the CPU, which should also be connected to chassis ground in the panel. This can be done with a short wire connected between the fifth terminal from the upper left of the CPU (Sensor "M") and the third terminal from the upper left of the CPU (chassis ground). This connection is recommended regardless of whether the sensor supply is used in the application. This connection is not currently shown in the 11/2009 version of theS7-1200 SystemManual but has beendemonstrated to improve the noise immunity of some applications.
Wright Posts: 7 Rating: (0)
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