ahmed s Member A Join Date May 2011 Location UAE Posts 3 May 10, 2011 #1 hi guys I need the programe for the PLC S7-200 that can recieve the current and voltage and give me the time betweent the zero crossing of the two sign wave. And then converte the time ( t ) to Q angle
hi guys I need the programe for the PLC S7-200 that can recieve the current and voltage and give me the time betweent the zero crossing of the two sign wave. And then converte the time ( t ) to Q angle
BryanG Member B Join Date Feb 2005 Location Manchester Posts 1,996 May 10, 2011 #2 A 50Hz signal gives 20ms between waves. The S7-200 timers best resolution is 1ms. You aren't going to get anything like a sensible reading.
A 50Hz signal gives 20ms between waves. The S7-200 timers best resolution is 1ms. You aren't going to get anything like a sensible reading.
L D[AR2P#0.0] Lifetime Supporting Member L Join Date Nov 2006 Location UK Posts 6,703 May 10, 2011 #3 Whta is the conversion time for the S7-200 analogues?
BryanG Member B Join Date Feb 2005 Location Manchester Posts 1,996 May 10, 2011 #4 From the Manual: Analog to digital conversion time: <250 microseconds and, though I am not entirely sure what it means: Analog input step response: 1.5 ms to 95%
From the Manual: Analog to digital conversion time: <250 microseconds and, though I am not entirely sure what it means: Analog input step response: 1.5 ms to 95%