The FnIO MODBUS Adapter NA-9189 is a MODBUS TCP/IP slave node designed for industrial control systems, serving as a starter module on the left side of an FnIO system. This adapter facilitates communication between a MODBUS TCP/IP master and various expansion modules within the FnIO system, enabling the exchange of process data.
Function Description:
The NA-9189 acts as a MODBUS TCP/IP server, allowing a master device (e.g., a PLC or configuration tool) to read input data from and write output data to connected FnIO expansion modules. It supports up to 32 expansion slots, managing a total of 126 words (252 bytes) for both input and output data. The adapter uses an internal FnBus system for communication with the expansion modules, which is a proprietary bus for power and data exchange.
The device supports various MODBUS function codes for reading and writing coils and registers, including:
- 0x01 Read Coils: Reads the status of discrete outputs (coils).
- 0x02 Read Discrete Inputs: Reads the status of discrete inputs.
- 0x03 Read Holding Registers: Reads the contents of holding registers.
- 0x04 Read Input Registers: Reads the contents of input registers.
- 0x05 Write Single Coil: Writes a single discrete output.
- 0x06 Write Single Register: Writes a single holding register.
- 0x08 Diagnostics: Provides diagnostic information about the device and communication.
- 0x0F Write Multiple Coils: Writes multiple discrete outputs.
- 0x10 Write Multiple Registers: Writes multiple holding registers.
- 0x17 Read/Write Multiple Registers: Performs a combination of read and write operations on registers.
The adapter also includes special registers for identification, watchdog timer configuration, TCP/IP settings, and expansion slot information, allowing for detailed monitoring and configuration.
Important Technical Specifications:
- Adapter Type: Slave node (MODBUS/TCP Server)
- Max. Expansion Module: 32 slots
- Max. Input Size: 126 words (252 bytes)
- Max. Output Size: 126 words (252 bytes)
- Max. Length Bus Line: Up to 100m from Ethernet Hub/Switch with twisted CAT 3 UTP/STP
- Baud Rate: 10/100Mbps, Auto-negotiation, Full duplex
- Protocol: 8 MODBUS/TCP, 4 HTTP, BOOTP, TBD
- Interface Connector: RJ-45 socket
- IP Address Setup: Via ARP, BOOTP (Default IP address: 192.168.123.1)
- System Power: 24Vdc nominal (range: 11~28.8Vdc), with output current limit (Min. 1.5A) and reverse polarity protection.
- Power Dissipation: 60mA typical @24Vdc
- Current for I/O Module: 1.5A @5Vdc
- Isolation: System power to internal logic: Non-isolation; System power to I/O driver: Isolation.
- Field Power: 24Vdc nominal (range: 11~28.8Vdc), DC 10A Max.
- Weight: 150g
- Module Size: 45mm x 99mm x 70mm
- Operating Temperature: -20 to 50 °C
- Non-Operating Temperature: -40 to 85 °C
- Relative Humidity: 5%~90% non-condensing
- Operating Altitude: 2000m
- Mounting: DIN rail
- Certifications: c-UL-us UL Listed Industrial Control Equipment (File E235505), DNV CERTIFICATE No. A-10666, CE Certificate (EN 61000-6-2; Industrial Immunity, EN 61000-6-4; Industrial Emissions), LR/FCC.
Usage Features:
The NA-9189 is designed for ease of integration into industrial automation systems.
- IP Address Configuration: The IP address can be set using ARP commands (e.g.,
arp -s <IP address> <MAC address>) or BOOTP. The default IP address is 192.168.123.1.
- Web Interface: The adapter features a simple web page accessible via its IP address (e.g.,
http://192.168.123.1/) for monitoring network adapter status, firmware revision, input/output image mode, expansion module count, and register ranges.
- Modular Expansion: It supports up to 32 expansion modules, allowing for flexible system design. The total length of the module assembly is limited to 426mm, with ST-2748 modules counting as double width.
- Plugging and Removal: Modules can be easily locked and unlocked on the DIN rail using a lever mechanism.
- FnBus System: Communication with expansion modules occurs via the internal FnBus, which provides 6 data pins and 2 field power pins. Users are cautioned not to touch data and field power pins to avoid soiling and damage by ESD noise.
- Process Image Mapping: The adapter manages input and output process images, which can be configured in different modes (uncompressed or compressed) to optimize data exchange.
- Watchdog Timer: A configurable watchdog timer (0x1020, 4128) ensures system reliability by monitoring MODBUS operation and triggering user-configured fault actions if communication is lost.
Maintenance Features:
The NA-9189 includes several diagnostic and troubleshooting features:
- LED Indicators: Five LEDs provide visual status feedback:
- MOD (Module Status): Green/Red, indicates device operational status, errors (MODBUS error, unrecoverable fault), or standby.
- LINK (Physical Connection): Green, indicates physical Ethernet connection.
- ACTIVE (Exchange Data/Traffic Present): Green, indicates active data exchange.
- I/O (Expansion Module Status): Green/Red, indicates expansion module status, configuration errors, or communication faults.
- Field Power Status: Green, indicates supplied 24Vdc field power.
- Troubleshooting Guide: The manual provides a detailed troubleshooting section based on LED status, covering issues like no power, initialization failures, incorrect I/O size, communication errors, and configuration problems.
- Network Diagnostics: Recommendations for diagnosing network issues include checking cable connections, terminator resistor installation, node address duplication, and master configuration (baud rate, I/O size).
- Error Response: The MODBUS interface provides error codes (e.g., Illegal Function, Illegal Data Address, Slave Device Failure) to help diagnose communication problems.
- Special Registers: Various special registers (e.g., Adapter Identification, Adapter Watchdog Time, Adapter TCP/IP, Adapter Information, Adapter User SRAM, Expansion Slot Information) allow for advanced diagnostics and configuration, providing insights into the adapter's state and connected modules.
Safety Instructions:
The manual emphasizes several safety precautions:
- ESD Protection: Modules contain electronic components sensitive to electrostatic discharge. Proper grounding of personnel, workplace, and packing is crucial during handling. Avoid touching conductive components like FnBUS pins.
- Explosion Hazard: The device is not suitable for use in hazardous environments where an explosion might occur.
- Power Supply: Ensure correct voltage and frequency for the power supply to prevent damage.
- Environmental Conditions: Maintain operating temperature within -20 to 50 °C, relative humidity between 5% and 90% (non-condensing), and avoid direct sunlight or placing modules near flammable material.
- Wiring: Use standard cables and ensure proper wiring according to specifications.
- Product Use: Use the product only under pollution degree 2 environment.
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