SIEMENS S7 1200 CB 1241 Modbus RTU Communication With RS485 Sensor and Multifunction Meter

MB_COMM_LOAD
Communication frame:
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a) Port Selection (RS485)
c) Baud Rate: 9.6 Kbps
d) Parity bit: None
c) Stop bit:1

d) Communication MB_DB for MB_Master
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MB_MASTER
a) MB_ADDR: SLAVE ID NO
b) MODE: SIEMENS MODBUS MODE
0: Read Data
1: Write Data

DATA_ADDR: Slave Register Data Address
DATA_LEN: for INT: 1, DOUBLE: 2
DATA_PTR: Define variable/ Data block for Mov modebus readable dataMeter Modbus
Communication Frame
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SLAVE ID = 1
BAUD = 9.6Kbps
Parity = None
Stop bit = 1

Data Length = 2. 2word= 2 register/ Parameter
10 Parametr = 20

PLC Data Type (SIEMENS)
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Data type Data Length Decimals/Data Format
========= ============ ===============

Real(Double/Float) 32bit 0.0000000
LReal (Double/Float) 64bit 0.000000000000000
int (Signed) 32bit -00000000+00000000
Dint (Signed) 64bit
Bool 2bit 0= false, 1 = true
Array of [Real,LReal,int,Dint,Bool]
Time (Dint) 64bit
String A-Z;

Internal PLC Memory
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M = BOOL
MD = Real/LReal
MW = int/Dint

Timestamps
0:00 into
1:00 start
10:00 Ending