The scheme and experience of designing

implementing

and perfecting the auxiliary control networks in auxiliary workshops of Wangtan Power Generation Co Ltd have been summarized as follows:(1)the design of auxiliary control networks should have a unified plan;(2)in programmed control system of coal handling

optical fibre connection must be adopted between main station and each remote station;(3)adopting compromise scheme for solving the problem of heavy load in system boasting more measuring points;(4)changing configuration of control systems for dry ash-handling

and for desulphurization

solving the problem of over-time interruption in communication.