Azbil C1M - Initial Output Type (Mode) of PID Control

5-18
Chapter 5. Functions
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Initial output type (mode) of PID control
Item (bank) Display Description Initial value User level
Initial output type (mode) of
PID control
(setup bank)
C 21
0: Automatic
1: Not initialized
2: Initialize (if a new SP is set)
0 Advanced
• If
CtrL
(control method) is set to 1 (PID control), this item is displayed and the
setting can be changed.
• When PID groups are switched according to a change in the SP or the SP group,
the MV may be stuck at the low or high limit, and the PV may not change or may
overshoot. PID control initialization is useful in preventing these problems.
• If 0 (automatic) is set:
When the SP value is changed or SP groups are switched, whether the PID
control must be initialized or not is determined automatically, and it is initialized
only when necessary.
• If 1 (not initialized) is set:
PID control is not initialized when the SP is changed or SP groups are switched.
This setting is useful if the continuity of the MV is important when the SP is
changed or SP groups are switched.
• If 2 (initialize) is set:
PID control is always initialized when the SP is changed or SP groups are
switched. This setting is useful if it is important that, when the SP is changed or
SP groups are switched, the MV increases or decreases quickly according to the
relationship between the PV and SP.