Modbus turnaround time

[shantanu@india]

Hi,
I'm trying to communicate with standard Modbus RTU slaves like energy meter using RS485 transceiver like 75176 @9600 baud.
After sending the packet, how fast do I need to turnaround from transmit to receive mode so that response characters from the slave are not missed?
I read somewhere 3 character times. Is there any standard modbus specification?

[ekmek]

https://en.wikipedia.org/wiki/Modbus
at least 3+1⁄2 character times of silence (mark condition) between frames

after CRC, give 3,5characters silence time

[shantanu@india]

Good