Thank you sir ,
i got solution for this but i saw it not update values every time i have to assign value to register
e.g i did set up for write 4 coils
timer =1
fc=16
count=4
update pmac.....
reg 1 m1000->x:$10780,0,16
reg 2 m1001->y:$10780,0,16
reg 3 m1002->x:$10781,0,16
reg 4 m1003->y:$10781,0,16
while updating value to this register every time i have to assign values to reg then save and $$$ cmd to see this values in MODBUS Slave software .......
any way i have to read modbus on PC and its solve means i am confident on our device sending correct values to modbus slave software.
once again Thank you to all.