Micromaster 420 and s7 300 Frequency Setpoint

[faisal rasool]

Hello All People,

I am useing S7 300 plc and Micromaster 420 with Profibus(CB). the problem is that when i set frequency setpoint in plc through wincc flexible 2008sp3 runtime.when Power Off the setpoint in plc is same but the MM420 does not start at same frequency.it show the 0.00hz frequency.The parameter in MM420 is
P700=6
P1000=6
P1080=0.00hz
P1082=50hz

 

[KalleOlsen]

Hello All People,

I am useing S7 300 plc and Micromaster 420 with Profibus(CB). the problem is that when i set frequency setpoint in plc through wincc flexible 2008sp3 runtime.when Power Off the setpoint in plc is same but the MM420 does not start at same frequency.it show the 0.00hz frequency.The parameter in MM420 is
P700=6
P1000=6
P1080=0.00hz
P1082=50hz

Which unit is powered off?

Are you aware that some of the command bits inhibits the setpoint and the setpoint ramping?


Kalle

 

[faisal rasool]

Thanks Kalle, now my problem is slove.