Valve controller adds diagnostics capabilities to reduce downtime, extend versatility

Diagnostics capabilities allow valves to warn of problems prior to failures.


Stonel has announced a new on-board diagnostics system for its Axiom AMI96 discrete valve communication and control device. The capabilities can help reduce process downtime and maintenance costs.

The system communicates via an AS-i network to save on wiring and installation costs. The company says the new system is an optional upgrade that can be added to the valve controller, and provides several local and remote diagnostic alerts to warn personnel of any impending trouble with the valve, actuator, or the valve communication and control terminal (VCT). Alerts may be triggered by a drop in pneumatic supply pressure below operational levels, or when a shorted or opened solenoid circuit is detected. Should the VCT's pneumatic spool or pilot valve become stuck due to air line contamination or others causes, or if the automated valve stalls in mid-stroke due to a jammed valve or actuator, additional alerts are activated. Alerts are cleared automatically as soon as normal operating conditions are restored.

Using the VCT's intelligent communication capabilities, open and closed settings can be initiated using on-board push buttons, or remotely from a control station. Also, the automated valve's location can be confirmed by remotely initiating a “wink” function, which flashes on-board LEDs for clear identification without interrupting valve operation.

The AS-Interface protocol (version 2.1 or greater) allows up to 31 Axiom VCTs to be networked into the control system on a single two-wire cable. Communication bits for position status, control and diagnostics may be mapped into standard DCS or PLC systems without special software.

—Edited by Peter Welander, process industries editor, ,
Control Engineering Process Instrumentation & Sensors Monthly
Register here and scroll down to select your choice of free eNewsletters .

No comments
The Engineers' Choice Awards highlight some of the best new control, instrumentation and automation products as chosen by...
The System Integrator Giants program lists the top 100 system integrators among companies listed in CFE Media's Global System Integrator Database.
The Engineering Leaders Under 40 program identifies and gives recognition to young engineers who...
This eGuide illustrates solutions, applications and benefits of machine vision systems.
Learn how to increase device reliability in harsh environments and decrease unplanned system downtime.
This eGuide contains a series of articles and videos that considers theoretical and practical; immediate needs and a look into the future.
Make Big Data and Industrial Internet of Things work for you, 2017 Engineers' Choice Finalists, Avoid control design pitfalls, Managing IIoT processes
Engineering Leaders Under 40; System integration improving packaging operation; Process sensing; PID velocity; Cybersecurity and functional safety
Mobile HMI; PID tuning tips; Mechatronics; Intelligent project management; Cybersecurity in Russia; Engineering education; Road to IANA
This article collection contains several articles on the Industrial Internet of Things (IIoT) and how it is transforming manufacturing.

Find and connect with the most suitable service provider for your unique application. Start searching the Global System Integrator Database Now!

SCADA at the junction, Managing risk through maintenance, Moving at the speed of data
Flexible offshore fire protection; Big Data's impact on operations; Bridging the skills gap; Identifying security risks
The digital oilfield: Utilizing Big Data can yield big savings; Virtualization a real solution; Tracking SIS performance
click me