Hoa (Hand/Off/Auto) Screen - ProMinent DULCOMETER PH-501 Assembly And Operating Instructions Manual

5.1.3 HOA (Hand/Off/Auto) Screen

This screen displays all devices controlled by the PLC. Under normal operation (auto mode), all
devices are set in the AUTO position.
Each PLC controlled motor or valve in the system has a Hand/Off/Auto (HOA) Switch to
control its operation.
The HAND (H) position of a switch is used for testing and troubleshooting of the system.
As a safety precaution to prevent damage to equipment, the equipment will operate for
two minutes in hand mode and will then turn OFF and revert to the (O) position.
Operators must be present when equipment is operated in the manual mode.
newterra O&M Manual
© 2017 by newterra, ltd.
All rights reserved. No part of this document may be reproduced or transmitted in any form or by any means, electronic, mechanical,
photocopying, recording, or otherwise, without prior written permission of newterra ltd.
Screen-shots presented in this manual are for example only
and may not be representative of ideal operation.
1291 California Avenue, Brockville, ON K6V 5W3
(800) 420-4056 / www.newterra.com
newterra ltd.
38