Оценок - 3, средний балл: 4.3 ( )

Производитель: AC International Размер: 944.79 kb Название файла: Язык инструкции:

An fault may occur if P 20 and the Assertion switch are not set identically. Note 5 If an EPM that contains data from a previous compatible software version is installed: • The drive will operate according to the previous data, but parameters cannot be changed ( will be displayed if attempted) • To update the EPM to the current software version, set P 99 = 5. The parameters can now be changed but the EPM is incompatible with previous software revisions. ENGLISH Commissioning 4.5.4 PID Parameters Code Possible Settings IMPORTANT • Normal-acting: As feedback increases, motor speed decreases • Reverse-acting: As feedback increases, motor speed increases • PID mode is disabled in Vector Torque mode (P 00 = 5) No. Name Default Selection 0 Disabled Normal-acting 2 Reverse-acting PID Mode 0 Note To activate PID mode, one of the TB- inputs (P 2 ...P 2 ) must be used to select the Auto Reference that matches the desired PID setpoint reference. If the selected PID setpoint reference uses the same analog signal as the PID feedback (P20 ), an fault will occur. Example: The desired PID setpoint reference is the keypad (s and t). Set TB- x = (Auto Reference: Keypad): • TB- x = closed: PID mode is active • TB- x = open: PID mode is disabled and the drive speed will be controlled by the reference selected in P 0 . PID Feedback Source 0 0 4-20 mA (TB-25) 0- 0 VDC (TB-5) 0 PID Display = XXXX PID Display = XXX.X 2 PID Display = XX.XX PID Display = X.XXX 4 PID Display = .XXXX -99.9 00.0 Must be set to match the PID feedback signal Applies to P204, P205, P2 4, P2 5, P2 ...P2 , P242, P522, P52 Set to match the range of the feedback signal being used Example: Feedback signal is 0 - 00 PSI; P204 = 0.0, P205 = 00.0 Used to tune the PID loop: • Increase P207 until system becomes unstable, then decrease P207 by 0- 5% • Next, increase P208 until feedback matches setpoint • If required, increase P209 to compensate for sudden changes in feedback PID Decimal Point Feedback at Minimum Signal 0.0 Feedback at Maximum Signal 00.0 -99.9 00.0 0.0 {%} 00.0 Proportional Gain 5.0 Integral Gain 0.0 0.0 {s} 20.0 Derivative Gain 0.0 0.0 {s} 20.0 Note • Derivative Gain is very sensitive to noise on the feedback signal and must be used with care • Derivative Gain is not normally required in pump and fan applications PID Setpoint Ramp 20.0 0.0 {s} 00.0 • time of setpoint change from P204 to P205 or vice versa. • Used to smooth the transition from one PID setpoint to another, such as when using the Preset PID Setpoints (P2 ...P2 ) ENGLISH Commissioning Code Possible Settings IMPORTANT No. Name Default Selection Minimum Alarm 0.0 P204 P205 Maximum Alarm 0.0 P204 P205 Preset PID Setpoint # 0.0 P204 P205 Preset PID Setpoint #2 0.0 P204 P205 Preset PID Setpoint # 0.0 P204 P205 Sleep Threshold 0.0 0.0 {Hz} 500.0 Sleep Delay 0.0 0.0 {s} 00.0 Sleep Bandwidth 0.0 0.0 B max Where: B max = |(P205 - P204)| Use with P 40, P 42 = 8...2 TB- A activated; P 2 = a...

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