The Four Generations of SCADA Architectures, mid-20th century into present; note PLC integration

How did Soviets keep pace with PNG "digital" tech?
Stern, "Gas pipeline co-operation between political adversaries: examples from Europe", 13 pp

At the Ottawa Summit in July 1981, President Reagan attempted to persuade European leaders
to reject imports of additional gas from the USSR. When this failed, the American Administration first tried to offer financial incentives and then applied extra-territorial sanctions to those components of gas compressor stations [!], being supplied by European companies, which were of American origin. This created a political crisis in relations between the US and its European allies. Eventually, after several months of dispute, the US lifted the sanctions and the Urengoy pipeline(s) went ahead with rather more Soviet, and rather less American, equipment than had been intended.14

CIA continuous residence in Germany since WWII is indisputable.

Why would CIA sabotage Soviet PNG?

CRS, "SOVIET PIPELINE IP0219S (1982), Ronald Reagan administrative actions to "block Soviet pipeline" plus press clippings documenting US frustration with allies' opposition, 29 pp

There you have it: means, motive, opportunity to cripple Soviet critical infrastructure ...official denial deposited in the Reagan Library notwithstanding.

Eric Li: "I make the joke..."