Delta ME300 Series - Page 329

Chapter 12 Description of Parameter Settings
ME300
12.1-08-14

08-68
PID deviation limit
Default: 0.00
Settings 0.00–100.00%
 When Pr.08-68 is not set to 0, the PID deviation limit function is enabled.
 When PID deviation ≤ PID deviation limit, PID stops adjusting action. It means the PID output
frequency maintains the previous value and this function is effective for some closed-loop control
applications.

08-69
Integral separation level
Default: 0.00
Settings 0.00–100.00%
 Reduces overshoot when overshoot occurs in the PID feedback at start-up.
 When Pr.08-69 is not set to 0, the integral separation function is enabled.
 The benchmark for the integral separation level is the PID error%.
 The integral separation function activates only once at start-up.
 When PID deviation ≥ Pr.08-69, the integral effect is cancelled to avoid the increasing system
overshoot due to the integral effect. When PID deviation is smaller than Pr.08-69, the integral
effect is activated to eliminate the steady-state error.
08-70
Smart start-up level
Default: 5.00
Settings 0.00–100.00%

08-71
Smart start-up frequency command
Default: 0.00
Settings 0.00–599.00 Hz

08-72
Smart start-up acceleration time
Default: 3.00
Settings 0.00–600.00 sec.
 When Pr.08-71 is not set to 0, the smart start function is enabled.
 The benchmark for the smart start level is the percentage of PID deviation.
 Use the smart start-up function to reduce overshoot when overshoot occurs in the PID feedback
at start-up. The smart start-up activates only once at start-up.
 When the smart start-up function is enabled, it starts with the Pr.08-71 frequency and Pr.08-72
acceleration time (Pr.08-72 acceleration time is the time that it accelerates to Pr.08-71). When
the PID deviation is smaller than Pr.08-70, it switches to the normal PID control (the smart start-
up frequency is filled into the PID integral when switching to PID control to avoid discontinuous
frequency).