change FREQ REF from modbus

hi every body.

I connected V20 inverter to DELTA modbus network.

I can change ACCEL  TIME  and DECEL  TIME ( Register  40011  , 40012) from modbus network. that mean my network is OK.

I adjust P1000=5    and write  50 (  for example ) in Register  40003 but frequency  reference  isn't change in my V20 inverter . which parameter I must change to be able to read  setting for frequency  from modbus network?

سلام 

This is a very good example you can use this program. 

Speed Control of a V20 with S7-1200 (TIA Portal) via USS® protocol/MODBUS RTU with HMI

Madadi

سلام 

This is a very good example you can use this program. 

Speed Control of a V20 with S7-1200 (TIA Portal) via USS® protocol/MODBUS RTU with HMI

I think  this document is not complete . for example there isn't any things about parameters P700   and P1000

Did you use cno11?

I used this method and I had no problems.

Factory reset once and test again 

Madadi

Did you use cno11?

I used this method and I had no problems.

Factory reset once and test again 

 Yes I used it. did you connect  V20 to other brand of modbus? or you connect to S7-1200 ?

I think when we connect to other brand of modbus(same delta HMI)  we have problem.

I connected the V20 to the s71200 using modbus. Communication is great when the number of drives is only one, but when the number of drives increases, the data transfer speed slows down. The V20 seems to be having trouble responding because the s71200 does not have this problem with other inverters.

What baud rate are you using?  9600?  Crank up the baud rate to 57600 or to the max available in all drives, or perhaps 1 less than the max if using cheap modbus cabling, or bad shielding, or horrible cable routing. 

Madadi

I connected the V20 to the s71200 using modbus. Communication is great when the number of drives is only one, but when the number of drives increases, the data transfer speed slows down. The V20 seems to be having trouble responding because the s71200 does not have this problem with other inverters.