CTH200 Series PLC User Manual
Filter the actual temperature
value, enhance Interference
immunity
Not filter the actual
temperature value
Kp (proportional
coefficient)
Table 4-6-13 Output pulse address, formula: X=(2048+S*256)+13; Y=(2048+S*256)+13:
Example:
Calculate last PID loop address of the second expansion module after 231-7HF , Kp=1200,
Ti=360, Td=50.set the pulse output cycle =2s, last channel of second module: S=1, C=7
DB BLOCK parameters: // S=1, C=7
VW2544 500 // Setting temperature
VB2546 16#07 // Control Word (PID enable, self-adjusted and bipolar output
VW2548 2 // Pulse output cycle
VW2550 1200 // Kp proportional coefficient
VW2552 360 // Ti integral time(s)
VW2554 50 // Td differential time(s)
VW2556 13000 // Range 1300 °(default)
VW2416 0 // Actual temperature
VW2418 0 // Status Word
VW2420 0 //PID analog output