I AM CONNECTING 8 DRIVES WITH MODBUS MASTER IN S71200 EACH DRIVE HAS 3 STEPS EACH STEP I SET REQ AND RESET IT WITH DONE AND ERROR BEFORE MOVING TO NEXT STEP BUT( I NOTICE WHEN SHUTDOWN ANY DRIVE ERROR BIT OF THIS DRIVE STEP IS DELAY AND RX/TX LEDS COMES OFF IN THE POWER OFF DRIVE STEPS  AND THEN ON IN THE OTHER DRIVES STEPS THAT ARE OK AND POWERED ON) I TRIED TO MOVE WITH TIMER BUT SAME RESULT JUST POWER ANY OF THEM OFF LEDS OF RX/TX COMES UNNORMAL AND ALL DRIVES GIVES COMM OVERTIME.

IS THIS IS DRIVES ISSUE OR PROGRAMMING ISSUE IF I CREATE MB COMM LOAD FOR EACH DRIVE CAN IT GIVES ERROR TO DRIVE THAT IS POWER OFF SO I SKIP THIS ADDRESS

NOTICE THAT WHEN I SKIP THE SHUTDOWN DRIVE ADDRESS ALL IS OK

Mr.V

Hello i think you need open MB_COMM_LOAD_DB and there you can find some parameters you can try to play with them like RESP_TO (Response timeout:Time in milliseconds allowed by "MB_MASTER" for the slave to respond. If the slave does not respond in this time, "MB_MASTER" repeats the request or terminates the request with an error if the specified number of retries has been sent.5 ms to 65535 ms (default = 1000 ms). you can try like 333ms (3 times faster for get error signal) then there also is RETRIES (defaut is 2) maybe you can set to 1

 Hello thanks for replying, today i tried what you suggest (RESP_TO changed from 1000 ms to 333 ms and retries was 0 by default) , nothing changed still if i not skip the address that is turned off RX/TX blinking so slowly and all drives gives comm overtime 

Any ideas

danw

It is very difficult to read ALL CAPS and without any punctuation.   I can't answer your question, but maybe someone else can it figure out it the text is separated into sentences.  

I AM CONNECTING 8 DRIVES WITH MODBUS MASTER IN S71200.

EACH DRIVE HAS 3 STEPS.  EACH STEP I SET REQ AND RESET IT WITH DONE AND ERROR BEFORE MOVING TO NEXT STEP.

BUT (I NOTICE WHEN SHUTDOWN, ANY DRIVE ERROR BIT OF THIS DRIVE STEP IS DELAY AND RX/TX LEDS COMES OFF IN THE POWER OFF DRIVE STEPS  AND THEN ON IN THE OTHER DRIVES STEPS THAT ARE OK AND POWERED ON).

I TRIED TO MOVE WITH TIMER BUT SAME RESULT, JUST POWER ANY OF THEM OFF LEDS OF RX/TX COMES UNNORMAL AND ALL DRIVES GIVES COMM OVERTIME.

IS THIS A DRIVES ISSUE OR PROGRAMMING ISSUE?

IF I CREATE MB COMM LOAD FOR EACH DRIVE, CAN IT GIVES ERROR TO DRIVE THAT IS POWER OFF SO I SKIP THIS ADDRESS?

NOTICE THAT WHEN I SKIP THE SHUTDOWN DRIVE ADDRESS ALL IS OK

 Thanks for help , i will take care next time.