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The 7i90HD manual mentions a medium speed real time interface (around 1 Mbyte/sec) in EPP. However, I'm specifically interested in the maximum encoder count rate. Could someone please provide this information?.

Thank you.
 

Hi people, I'm Hernan and I'm just starting in the world of EtherCAT and my knowledge about the protocol is very limited, my main intention is to establish communication between the AX58100 with a STM32 (H753ZI) to make an encoder and the documentation I've found is very scarce, does anyone know how I can do this or know where I can find documentation to do it? I have been reviewing Chinese forums such as CSDN about this topic but I can not establish communication between these chips and I really do not know what to do, I know that here there are people who have a lot of knowledge and can give me a hint where to start, I remain at your disposal and thank you in advance.

btvpimill wrote:

If I understand this correctly, it is trying to read the data starting at address 0305h?
If thats true, I think that address does not exist in my controller.
 

No, the layout is:

[01] Modbus address
[01] Read Function
[03] Three byte command
[05] Read parameter 5 ( PD005 Max Operating Frequency )
[00, 00] placeholder data, unused
[2C, 4F] Checksum.

Your error response is:

[01] Modbis address
[81] Error bit (80) + the command [01] = 0x81
[02] = Illegal Data Address*
[C1, 91] Checksum

I don't know why it is saying "illegal address" as this has been working for several years on my own lathe with HyVFD and the driver code hasn't changed very much in that time. 

_My_ VFD isn't even sending a valid response, or a correct checksum. 

Function code 40 is wrong, 0xA0 is _way_ too many bytes, d0 isn't an exception code, and 36EE is not a valid checksum. 

Unfortunately I can't even see my VFD control panel without pulling the lathe away from the wall. I really hope I don't need to do that. Though it would be a good opportunity to fit a braking resistor. 






*The data address received in the query is not an allowable address for the slave. More specifically, the combination of reference number and transfer length is invalid. For a controller with 100 registers, a request with offset 96 and length 4 would succeed, a request with offset 96 and length 5 will generate exception 02.

I'm sorry but this does not work for me as described.

Few have chimed in(thanks for those that have), does anyone have VersaProbe working as expected?

If index is detected properly (at the identical rotor angle regardless of speed)
The Z Axis position should be in strict relation to spindle angle so this does seem to
suggest an Index issue or perhaps a Z axis problem (What are the following error limits?).

Perhaps plotting the z axis position and spindle angle in halscope
while threading at different speeds would shed some light on whats going on...