Intégration Modbus TCP avec Ignition : Protocole universel pour les équipements industriels

# Modbus TCP Device Configuration
# ─────────────────────────────────
Device Name:     EnergyMeter_01
Driver:          Modbus TCP
Hostname:        192.168.1.100
Port:            502
Unit ID:         1

# Connection Settings
Connect Timeout:       5000 ms
Reconnect Rate:        5000 ms
Max Requests Per Sec:  0 (unlimited)

# For Modbus RTU over TCP (serial-to-Ethernet converter):
Device Name:     TempSensor_RTU
Driver:          Modbus RTU over TCP
Hostname:        192.168.1.200
Port:            4001
Unit ID:         3

# Modbus Address Syntax in Ignition
# ────────────────────────────────────

# Holding Registers (Function Code 03 / 06 / 16)
HR100          # Read Holding Register 100 as Int16
HR100:INT32    # Read HR100-101 as 32-bit integer
HR100:FLOAT    # Read HR100-101 as 32-bit float

# Input Registers (Function Code 04)
IR200          # Read Input Register 200 as Int16
IR200:FLOAT    # Read IR200-201 as 32-bit float

# Coils (Function Code 01 / 05 / 15)
C0             # Read Coil 0 as Boolean
C100           # Read Coil 100 as Boolean

# Discrete Inputs (Function Code 02)
DI0            # Read Discrete Input 0 as Boolean
DI50           # Read Discrete Input 50 as Boolean

# Tag path example in Ignition:
# [Modbus]EnergyMeter_01/HR100:FLOAT

# Data Type Suffixes for Modbus Addresses
# ──────────────────────────────────────────
HR100          # INT16   (1 register)
HR100:INT32    # INT32   (2 registers)
HR100:UINT16   # UINT16  (1 register, unsigned)
HR100:UINT32   # UINT32  (2 registers, unsigned)
HR100:FLOAT    # FLOAT32 (2 registers, IEEE 754)
HR100:DFLOAT   # FLOAT64 (4 registers)
HR100:STRING20 # String of 20 characters (10 registers)

# Byte/Word Order (for multi-register types)
HR100:FLOAT:ABCD   # Big-endian (default)
HR100:FLOAT:CDAB   # Word-swapped
HR100:FLOAT:BADC   # Byte-swapped
HR100:FLOAT:DCBA   # Little-endian

# Scaling in Ignition Tag Configuration:
# Raw Value:  0 - 4095  (12-bit ADC)
# Scaled:     0.0 - 100.0 (engineering units)
# Mode:       Linear (y = mx + b)
# Scale High: 100.0
# Scale Low:  0.0
# Raw High:   4095
# Raw Low:    0

# Polling and Optimization Settings
# ────────────────────────────────────

# Tag Group Configuration
Tag Group:          Default
Poll Rate:          1000 ms    # Read every 1 second
Stale Timeout:      5000 ms    # Mark stale after 5s
Leased Poll Rate:   250 ms     # When actively viewed

# Device-Level Optimization
Request Optimization:  Enabled
Max Registers/Read:    125      # Modbus limit = 125
Max Coils/Read:        2000     # Modbus limit = 2000
Max Gap Size:          8        # Gap between registers
                                # to merge into 1 request

# Example: Without optimization
# HR100, HR101, HR110, HR111 = 4 separate requests

# With optimization (Max Gap = 12):
# HR100-HR111 = 1 request (12 registers)

# Performance tip: Group tags by device and poll rate
# Fast Group (250ms):  Critical alarms, safety signals
# Normal Group (1s):   Process values, measurements
# Slow Group (30s):    Configuration, setpoints