OPTO22由工程師于1974年創立，OPTO22產品設計用于非專有通信標準，如以太網和互聯網協議（IP）。開放標準和商用技術降低了自動化成本，并在需要時開放數據。

OPTO22控制器SNAP-PAC-R1介紹

The SNAP-PAC-R1 是一種緊湊型可編程自動化控制器，提供控制、通信和輸入/輸出處理。它具有多樣化的應用方式，可滿足工業自動化、遠程監控和數據采集的多種需求。主要特點如下：

系統架構

支持單機完整控制，配備 I/O 模塊

可同時控制 SNAP I/O 和 groov EPIC I/O 單元，適用于更大規模系統

作為遠程以太網 I/O 單元，用于連接控制器或PC上的自定義控制應用

可與 PAC Project Basic（免費）或 PAC Project Professional（付費）軟件配合使用

網絡連接

配備兩個 10/100 Mbps Ethernet 網絡接口，支持網絡隔離和鏈路冗余

具備 RS-232 串口（支持硬件握手，用于串口設備連接或 PPP 通信）

編程與協議

使用 PAC Control 軟件（基于流程圖），在PC上開發調試，然后下載到R1運行

支持 OptoMMP, Modbus 和 EtherNet/IP 等遠程I/O協議

支持 REST API 和 Node-RED，用于Web訪問策略標簽（需要固件 R9.5a 和 PAC Project R9.5a）

兼容 PAC Display 軟件，用于構建操作員界面（HMI），以及 groov View

通信能力

支持TCP/IP, EtherNet/IP, PPP, Modbus/TCP, SNMP, SMTP等多種協議

支持多協議并行通信，靈活集成各種網絡設備

I/O 處理

支持多達 4, 8, 12 或 16個數字、模擬、串口和特殊I/O模塊

模塊功能包括：熱電偶線性化、上下限校準、比例縮放、斜坡控制、輸出夾緊、濾波、看門狗等

支持多達 96個PID控制回路

數字模塊支持：鎖存、高速計數（最高20 kHz）、編碼器計數、脈沖生成測量、TPO和看門狗

這款控制器適合各種工業自動化應用，靈活擴展，并能與多種硬件和軟件平臺無縫集成。

The SNAP-PAC-R1 programmable automation controller provides control, communication, and I/O processing in a compact, rack-mounted package. A versatile controller, the SNAP-PAC-R1 is:

fully integrated with PAC Project software, SNAP PAC brains, and SNAP I/O modules;

compatible with groov EPIC, either as a SNAP PAC R-series I/O unit to a groov EPIC or to control groov EPIC I/O units (requires PAC Control R10.0a or higher); and

can be used as a remote Ethernet I/O unit to custom control applications running on controllers or PCs.

Used with the freely available PAC Project Basic software suite (or PAC Project Professional, purchased separately), the Ethernet-based SNAP-PAC-R1 can handle almost all your industrial control, remote monitoring, and data acquisition needs.

System Architecture

This intelligent, flexible PAC can be used in several ways. The SNAP-PAC-R1 can provide complete cell control on its own rack with I/O modules. It can also control SNAP I/O and groov EPIC I/O units simultaneously for a larger system. Or the R1 can be used in a more extensive distributed control system as a remote I/O unit controlled by a groov EPIC processor or a SNAP PAC S-series controller. It can even be used as intelligent remote I/O for Allen-Bradley Logix PLC systems, such as ControlLogix and MicroLogix.

Networking

Two independent, 10/100 Mbps Ethernet network interfaces are included on each SNAP-PAC-R1. These interfaces have separate IP addresses and can be used to segment the control network from the company network or to provide Ethernet link redundancy in case of link failure or maintenance. In addition, the controller has an RS-232 serial port with hardware handshaking, which can be used for direct connection to serial devices or for PPP (Point-to-Point Protocol) communication over a modem.

Programming and Protocols

The SNAP-PAC-R1 is programmed using the included PAC Control software. PAC Control is a flowchart-based tool for developing control applications (strategies). You create and debug the strategy on your computer and then download it to the R1, where it runs independently. (Processor and memory resources—which affect control application performance—may vary; for more information, see the memory and processor specifications in the Specifications table.)

Remote I/O: The SNAP-PAC-R1 supports OptoMMP, Modbus, and EtherNet/IP protocols. For tasks like network addressing and protocol configuration, you can use the freely available PAC Manager tool to configure the R1 over an Ethernet network.

REST API & Node-RED: Developers can securely access PAC Control strategy tags using the built-in HTTP/HTTPS server and RESTful API, with data delivered in JSON format. For complete API documentation and steps for getting started,  In addition, two Opto 22 Node-RED nodes are available. Note that minimum firmware R9.5a and PAC Project R9.5a are required to use the REST API.

HMI: You can build full-featured operator interfaces (HMIs) using the freely available PAC Display Basic (or PAC Display Professional, purchased separately) software, which taps the same tagname database you've already developed in your PAC Control strategy. SNAP PAC R-series controllers are also compatible with Opto 22's groov products and groov View HMI tool.

Communication: Because the SNAP-PAC-R1 is based on the Internet Protocol (IP), the SNAP-PAC-R1 can communicate simultaneously using several different protocols, including TCP/IP, EtherNet/IP, PPP, Modbus/TCP, SNMP for network management, SMTP for OptoMMP, the open memory-mapped protocol used by all Opto 22 Ethernet-based devices.

I/O Processing

The controller mounts on a SNAP PAC mounting rack with up to 4, 8, 12, or 16 digital, analog, serial, and special-purpose I/O modules. Choose the modules needed for your application from the extensive line of SNAP I/O modules.

Analog features include thermocouple linearization, minimum/maximum values, offset and gain calibration, scaling, ramping, TPO, output clamping, filter weight, and watchdog timer. The SNAP-PAC-R1 also offers up to 96 PID loops.

Digital features on 4-channel digital modules include latching, high-speed counting (up to 20 kHz, depending on the module), quadrature counting, pulse generation and measurement, TPO, and watchdog timer. Features on high-density digital modules are more limited (see module data sheet for details).

OPTO22控制器其他常用型號：

OPTO22 SNAP-PAC-R1

OPTO22 SNAP-PAC-R1-B

OPTO22 SNAP-PAC-RCK8

OPTO22 SNAP-PAC-RCK4

OPTO22 SNAP-PAC-S1

OPTO22 SNAP-PAC-RCK12

OPTO22 SNAP-PAC-RCK16

OPTO22 SNAP-PAC-S2

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OPTO22控制器SNAP-PAC-R1介紹及技術參數