i already connect plc s7 1200  cm 1241  with five w100  laumas  weighting indicator modbus rtu 

but there is a delay time response ..and this is the problem when i compare set point with actual point 

the weight is much much more ?

any one can help me to increase the response time ?

the sequence of communication :

1-in first scan we call mb_comm_load 

2-in first scan call mb_master for  mb_addr 4 

3-from done signal or error signal  from step 2  call mb_master for mb_addr 5 etc 

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Split from Modbus RTU TIA PORTAL.