I'm using "SimpleModbusSlaveV9"
Then your code won't compile. Version 9 has the same definition of modbus_configure() as version 10, so your call is wrong for that version too. If that code compiles for you, you mixed up different versions of the library and the result may be unpredictable.
the configuration at PC simulator and the wiring diagram is in attachment.
On your PC your configuring the serial interface for 8E1, while in the sketch you're specifying 8N1. These values must be consistent.