通讯参数

波特率：110波特至115.2 kbps
停止位：1或2
数据大小：7或8位
奇偶校验：无，偶数，奇数
RTS定时延迟：0至65535毫秒

Modbus模式

带有LR-16
错误检查的CRC-16 ASCII模式的RTU模式（二进制）

Floating Point Data

Floating point data movement supported, including configurable support for Enron and Daniel implementations

Modbus Function Codes

1: Read Coils Status
2: Read Input Status
3: Read Holding Registers
4: Read Input Registers
5: Force (Write) Single Coil
6: Preset (Write) Single Register
8: Diagnostics
15: Force (Write) Multiple Coils
16: Preset (Write) Multiple Data Registers
17: Report Slave ID
22: Mask Write 4x Register
23: Read/Write 4x Registers

Command List

Up to 325 commands per Master port, each fully configurable for function code, slave address, register to/from addressing and word/bit count.

Optimized Polling

Configuration options allow Master ports and commands to be optimized to poll slaves with communication problems less frequently.

Command Status/Error Monitoring

Command Status or Error codes are generated for each command as it executes, allowing careful monitoring o fcommunication health between the Master and its Slaves.

Slave Polling Control

Master Port maintains a Slave Status list of all network Slaves. Polling of each Slave may be disabled and enabled using this list.

Full Memory Access

A port configured as a Modbus Slave permits a remote Master to read from or write to any of the 5000 registers that make up the user memory database.

Multi-source Slave data

Data presented at the Slave port can be derived from other Modbus Slave devices on a different network through the module's Master port or from the processor tag database.

Node address

1 to 247 (software selectable)

Status Data

Slave port error codes, counters and statuses are available separately for each port when configured as a Slave