This　paper　mainly　presents　the　self-tuning　PID　controller　based　on　improved　BP　neural　network　for　a　networked　control　system　(NCS)　with　the　presence　of　network　transmission　time-delay　and　power　compensation　at　amplifiers＇　node　firstly.　In　this　study,　the　function　of　the　standard　control　plane　of　the　automatically　switched　optical　network　is　enhanced　to　perceive　transmission　impairments　and　control　tunable　physical　impairment　compensators　in　the　physical　layer.　A　link　level　power　control　model　is　introduced　to　the　dynamic　adjustment　for　learning　rate　and　adjusts　the　OSNR　value　of　the　signals　toward　channel　OSNR　optimization.　Control　algorithms　continuously　update　their　channel　powers　in　response　to　dynamic　information　from　the　network　links.　And　the　controller　could　achieve　the　on-line　adaptive　power　compensation　without　changing　the　parameters　of　PID　controller.　The　results　of　simulation　show　that　the　proposed　new　PID　controller　is　better　to　adjust　channel　power　independently　at　the　transmitter　sites　and　achieve　channel　optical　signal-to-noise　ratio　(OSNR)　optimization　with　network　time-delays.