Hello,
I am after variable frequency drive, to control the electric motor RPM via RS485(Modbus).
There is a Bosch Rexroth EFC5610 VFD, which I really like, it has an in-build motor thermal protection, but in Modbus communication description it warns that the registers read/write limit is only 150000 times/register. I will be changing the frequency registers frequently and that worries me.
I had a look at other VFDs (Siemens V20, Schneider ATV12, Parker AC10) and none of their manuals mention the Modbus communication limits for read/write cycles per register.
A lot of the industrial electronics seem to have unwritten defaults and I wonder whether the 150k cycles mentioned by Bosch is default for majority of VFDs, or is it just the big drawback of the EFC5610 VFD?
Thanks