Mitsubishi Electronics MELSEC-F - page 486

M-16
3 Parameter
FX 3G /FX 3U /FX 3UC PLC User's Manual - Analog Control Edition
PID Instruction (FNC 88)
3.2 Details of Parameters
Example 1: PID operation in heating (backward operation)
Example 2: PID operation in cooling (forward operation)
Time
Temperature
Changes caused by disturbance
TD3 > TD2 > TD1
PI operation (without differential operation)
Time
Output (MV)
Changes in output caused by disturbance
PI operation (without differential operation)
TD3 > TD2 > TD1
TD3 (PID operation)
TD3 (PID operation)
TD2 (PID operation)
TD1 (PID operation)
TD2 (PID operation)
TD1 (PID operation)
Target value (SV)
Time
Temperature
Changes caused by disturbance
TD3 > TD2 > TD1
Time
Output (MV)
Changes in output caused by disturbance
TD3 > TD2 > TD1
PI operation (without differential operation)
TD1 (PID operation)
TD2 (PID operation)
Target value (SV)
PI operation (without differential operation)
TD3 (PID operation)
TD1 (PID operation)
TD2 (PI operation)
TD3 (PID operation)