SP350 Series Programmable Logic Controllers
Weatherford offers the SP350 series programmable logic controllers
(PLCs), a quantum leap in performance and flexibility. The
controllers combine high-performance 32-bit processing with high
speed LAN and USB communication and advanced power-saving
features. Additionally, the product has an integrated power supply,
12 to 24 Vdc converter, analog and digital input/outputs (I/O),
serial communication capabilities and turbine flowmeter counter
inputs. The PLCs use industry-standard Modbus® and DNP 3
serial protocols as well as Modbus TCP and UDP based Ethernet
protocols, and can be programmed locally or remotely through a
choice of flexible programming languages.
Compact and Powerful–the SP350 series PLCs provide remote terminal unit (RTU) functionality with flexible programming options. The unit is programmable in either the TelePACE™ ladder logic editor or the IEC 61131-3 family of languages and provides sophisticated control functionality such as flow calculation and proportional-integral-derivative (PID) control. Additionally, up to 32 independent C/C++ applications can be loaded, executed and deleted in parallel with standard controller logic to provide maximum flexibility and performance. The central processing unit includes a 32-bit microprocessor with 16 Mb flash ROM and 4 Mb CMOS RAM for use in firmware and application programming. Custom power saving features include multiple configurable power modes, sleep mode, 24 V power shutdown as well as serial/LAN/USB port and clock frequency power consumption control. The basic controllers come with six analog inputs, eight digital I/O, three counter inputs (including two turbine meter inputs) and two optional analog outputs. With the addition of the optional 5606 lower I/O module, an extra 32 digital inputs, 16 digital outputs, 8 analog inputs and 2 analog outputs are available. Support for I/O expansion modules further increases the controller’s I/O capacity and versatility. With all these features, the SP350 series controllers are the right choice for a wide variety of process control and metering connections.
Flexible Communications–as with all controllers, the PLCs offer a variety of communication modes making them one of the most communication rich controllers on the market. The PLCs include two USB 2.0 compliant ports providing low speed (1.5 Mb/s) and full speed (12 Mb/s) communication, a peripheral port to connect the controllers to PC-based applications and a powered host port to attach third-party hardware such as mass storage devices (memory sticks). One RS-485, one RS-232/485 and one RS-232 serial communication port offers Modbus RTU, Modbus ASCII and DNP 3 communication protocols. For applications requiring high speed Ethernet LAN or WAN communication, a fully integrated 10/100BaseT Ethernet port furnishes Modbus/TCP, Modbus RTU/ASCII in UDP, DNP in TCP, DNP in UDP and ICMP (ping). For those challenging remote applications, a fully integrated, license-free spread spectrum wireless module is available at 900 MHz and 2.4 GHz. The controllers also support external radios and dial-up modem communication.