What are the core protection mechanisms of WOODWARD Vertex's anti surge control?

Ethernet and serial communications allow users to easily connect the Vertex in to plant or process control system. All controller inputs, outputs, and statuses can be monitored and all start/stop or enable/disable commands can be given through industry standard Modbus TCP or OPC protocols. The Vertex control uses SNTP (synchronized network time protocol) over Ethernet to allow users to synchronize the control’s real-time clock to the plant distributed control system.

Compressor and motor interface input and output-wiring access is located on the controller’s lower back panel. Unpluggable terminal blocks allow for easy system installation, troubleshooting, and replacement. Optionally users can increase the number of inputs and outputs signals to/from the Vertex control by connecting RTCNet distributed I/O nodes to the controller’s CAN communication ports and configuring the control to use the connected distribute inputs and outputs. The following additional I/O signals can be connected to the Vertex control via CAN communications:

(16) 4-20mA input channels and (4) 4-20mA output channels (via 2 RTCNet AIO module)

(8) RTD signals (via 1 RTCNet RTD module)

(16) Discrete Inputs (via 1 RTCNet DI module)

(16) Relay output drivers (via 1 RTCNet DO module)

The Vertex controller includes the following PID control & protection functions:

Performance Control PID,Rate PID Control

Performance Limiter PID,Boost (open-loop backup line response)

Anti-Surge PID Control,Surge Recovery

Surge Minimum Position,Start, Purge, Stop, Shutdown, & Zero Speed Sequencing Positions

Alarm & Shutdown Logic,Load sharing among 5 trains with no additional hardware for Master Controller.

Easy Load sharing setup. (Plug and Play configuration).

Independent PID (gland seal steam, other)

Optionally users can utilize Woodward’s RemoteView software program with the Vertex control to function as a remote operator control panel and or engineering station. This software program once loaded onto a remote computer or touch panel, allows the user to perform all of the Vertex control’s front panel display functions (monitor, operate, tune, and configure) on the respective computer or touch panel. Password based login level security is utilized with this software program to allow users to manage what functions they want the remote panel user to have.

The Vertex controller includes a suite of service tools to allow users to perform the following functions:

Upload configuration settings files from the Vertex to save on another device

Download configuration settings files to the Vertex

Download and view DataLog files

View real-time or saved trend files

Specifications

Cost-Effective Design—The Vertex control is designed to function as the compressor control, performance control, anti-surge control, system sequencer, operator control panel, and first-out indicator. This encompassing design minimizes external system devices as well as system installation, wiring, and troubleshooting.

This field configurable controller allows major functional changes to be made at site, often by knowledgeable plant personnel, and minor functional changes to be on-line as process changes require. The Vertex control’s first-outindicator logic indicates internal as well as external system related alarm and shutdown conditions, greatly simplifying and reducing system troubleshooting.

Communications—The Vertex control can communicate directly with plant Distributed Control Systems and/or operator control panels, through Ethernet ports using Modbus TCP or OPC communication protocols, or via one serial Modbus port. The single serial port supports RS-232 or RS-485 communications using ASCII or RTU Modbus protocols.

Communications between the Vertex and a plant DCS can also be performed through hardwired connections.

Internal communication between Vertex units for Load sharing communication is through UDP protocol.

System Protection

Anti-surge protection (1 or 2 recycle loops)

Boost (open-loop backup line response)

Surge Detection

Surge Recovery

Surge Minimum Position

First-out Indication (alarm & trip inputs)

Bearing temperature alarm and trip settings

Compressor vibration alarm and trip settings

Control CPU & memory failure detection logic

Mode login level password security

Control—The following PIDs /controls are available for use in controlling and protecting the compressor train:

Anti-Surge PID Control

Rate PID Control

Performance PID Control

Load sharing controller

Independent PID

Start, Purge, Stop, Shutdown, & Zero Speed

Alarm & Shutdown Logic

Control Specifications

INPUTS

Power:LV models = 18 - 36Vdc

HV models = 88 - 264Vac & 90-150Vdc (50 watts max)

Speed:(2) Passive MPUs or 2 Active Proximity probes (0.5 – 32,000 Hz)

Discrete Inputs:(19) Configurable Contact Inputs (optionally (16) additional inputs via RTCNet module)

Analog Inputs:(8) Configurable 4-20mA Inputs

(optionally (16) additional inputs via RTCNet module)

OUTPUTS

Valve/Actuator Drivers:(2) Actuator Output, 4-20mA or 20 200mA

Discrete Outputs:(7) Relay Outputs (24Vdc @ 2 amps,

Form-C contacts) (optionally 16 additional outputs via RTCNet module)

Analog Outputs:(6) 4-20 mA Outputs (optionally 4