PPCL for Building Automation

Anyone familiar with building automation programming, I work in the HVAC field and have been focusing on Building Automation. When it comes to programming jobs people don't even seem to know that this even exists. As technology advances the more we rely on automated systems and user-friendly front ends to control large energy management systems. PPCL is one of the text-based languages I use but there are also others that are built using logic trees in a GUI. Just interesting stuff wanted to see if anyone was familiar with the field here.

PPCL = Powers Process Controls Language which is used to control analog inputs and outputs like actuators and relays to automate a system.

Example logic for a chiller:
// Chiller enable starts chiller and condenser, chiller reset resets chilled water temp.
Chiller(CLR_PG)
If OAT > 13 and ENBL OFF-FOR 30 M AND
MAX (CCV1, CCV2) > 90 THEN
ENBL = ON, START P1
If OAT < 11 OR
MAX (CCV1, CCV2) < 10 THEN
ENBL = OFF
IF ENBL OFF-FOR 15 M THEN STOP P1
IF P1_AMP > 6 THEN
P1_S = ON
ELSE P1_S = OFF

//Reset
RWT_SP = 12
IF ENBL ON THEN CR = CO
ELSE CR = 0