Micromod MOD: MODBUS RTU Communications Guide Manual do Utilizador descarregar pdf (Página 19)

MODBUS RTU

COMUNICATIONS GUIDE

HOST CONFIGURATION EXAMPLES

MODBUS WITH FIX AND COMMANDER 150

Either the MB1 or EMP driver may be used, though EMP is recommended. The MODBUS guide uses 1 and

2-digit numbers for addresses. Note that the actual addressing requires a 5-digit number. For digital

addresses, use 000xx format, where xx represents the coil address from the instruction book. For analog

addresses, use 400xx format, where xx represents the register address from the instruction book.

Table 6. MODBUS with FIX and Commander 150

Poll Record Configuration

Hardware MODBUS

Addressing Type 5-Digit

Bit Base 0-15

Data Types Unsigned - Positive Analog Ranges (up to 9999)

Signed - Analog Ranges (between -999 and +9999)

Long - Analog Double Register Values (between -9999 and 99999)

Database Configuration

Data Type Database Block Address Range Notes

Digital Input DI 000xx

Digital Output DO 000xx

Digital I/O DR 000xx select output enable

Analog Input AI 400xx LIN Signal Conditioning

Analog Output AO 400xx LIN Signal Conditioning

Analog I/O AR 400xx LIN Signal Conditioning

NOTES:

1. Each line of the poll record can have no more than 8 analog or 16 digital addresses.

2. It is acceptable to “read through” undefined addresses.

3. Use a calculation block to scale for proper decimal point position.

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Micromod MOD: MODBUS RTU Communications Guide Manual do Utilizador Página 19