*** NOTE: The SNAP-PAC-R2-W is obsolete and no longer available. ***
The SNAP-PAC-R2-W offers all the same functionality as a SNAP-PAC-R2, and it adds wireless LAN communication capability as well.
This rack-mounted programmable automation controller provides control, communication, and I/O processing in a compact package. One of four components of the SNAP PAC System, the SNAP-PAC-R2-W is fully integrated with PAC Project software, SNAP PAC brains, and SNAP I/O modules.
Used with the included PAC Project Basic software suite (or PAC Project Professional, purchased separately), the Ethernet-based SNAP-PAC-R2-W can handle almost all your industrial control, remote monitoring, and data acquisition needs.
This intelligent, flexible PAC can be used in several ways. The SNAP-PAC-R2-W can provide complete cell control on its own rack with I/O modules. It can also control SNAP PAC I/O units at the same time for a larger system. Or the R1 can be used in a more extensive distributed control system as an I/O unit controlled by a SNAP PAC S-series
standalone controller. It can even be used as intelligent remote I/O for Allen-Bradley Logix PLC systems, such as ControlLogix and MicroLogix.
The SNAP-PAC-R2-W includes a wireless LAN interface that supports 802.11a, b, and g network standards. The controller can be used in infrastructure or ad-hoc mode. For security, 802.11i standards are supported, including WPA2-AES as well as WPA and WEP for backwards compatibility.
In addition, the PAC includes two independent, 10/100 Mbps wired Ethernet network interfaces. You can use the PAC wirelessly, on a wired network, or both at once. All three interfaces—one wireless and two wired—have separate IP addresses. They 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 PPP (Point-to-Point Protocol) communication over a modem or for direct connection to serial devices.
Programming and Protocols
The SNAP-PAC-R2-W is programmed using the included PAC Control software. PAC Control is a flowchart-based tool for developing control applications, or strategies
. You create and debug the strategy on your computer and then download it to the PAC, where it runs independently. The controller has 32 MB of RAM and can run up to 16 PAC Control flowcharts at once (many more can be included in the strategy).
All I/O point and strategy variable data is available for secure access using the built-in HTTPS server and RESTful API, with data delivered bpiin JSON format. For complete API documentation and steps for getting started, see developer.opto22.com
. In addition, two Node-RED nodes are available. Note that minimum firmware R9.5a
and PAC Project R9.5a
are required to use the REST API.
You can build full-featured operator interfaces (HMIs) using the included PAC Display software, which taps the same tagname database you've already developed in PAC Control. OR take advantage of Opto 22's groov
to quickly build and view HMIs you can use on virtually any computer, tablet, or smartphone—any screen size, from any manufacturer—using just a modern web browser (like Firefox or Chrome). Learn more about groov.
In addition to control, the SNAP-PAC-R2-W provides communication. Because it is based on the Internet Protocol (IP), the SNAP-PAC-R2-W can communicate simultaneously using several different protocols, including TCP/IP, EtherNet/IP, PPP, Modbus/TCP, SNMP for network management, SMTP for emailing, and OptoMMP, the open memory-mapped protocol used by all Opto 22 Ethernet-based devices.
The controller mounts on a SNAP PAC mounting rack
with up to 4
, 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-R2-W also offers up to 96 PID loops.
- Digital features are simplified on the SNAP-PAC-R2. Digital features include status, latching, watchdog timer, TPO, totalizing, and pulse generation.
The SNAP-PAC-R2-W uses the same mounting racks and the same I/O modules no matter which network communication method you choose. If you change from a wired network to a wireless LAN or back again, you do not need to add hardware, reconfigure I/O, change field wiring, or change programming.
If you need high-speed digital features, see the SNAP-PAC-R1-W
If you don't need a wireless LAN interface, see the SNAP-PAC-R2
To compare product features, see the Compare SNAP PAC controllers and brains
Build your system in the SNAP I/O Configurator