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5-8
Chapter 5. FUNCTIONS
■
PID set selection
• Eight sets of PID parameters, PID1 to PID8
for CH1 and PID2-1 to PID 2-8 for CH2, are
used for control operation. When the PID set
No. is set to each segment by designating the
PID set segment, control output is calculated
by each of the PID parameters.
• There are two ways of selecting PID sets: by
designating the PID set segment and by PID
set auto-switching. The method can be
selected by setting setup data
C11
or
C34
.
C11
set to 0: Designation of CH1 PID set
segment
C11
set to 1: CH1 PID set auto-switching
C34
set to 0: Designation of CH2 PID set
segment
C34
set to 1: CH2 PID set auto-switching
These two methods cannot be set simultaneously in PID set selection on the same channel.
Note
When setup data C11 is set to 1, PID set
No. items (CH1) in the program setup are
not displayed.
When setup data C34 is set to 1, PID set
No. items (CH2) in the program setup are
not displayed.
• By designation of PID set segment, the
PID set No. is set for each segment, and
control output is calculated by each of the
PID parameters.
• By PID set auto-switching, the SP full-
scale is divided into eight zones according
to the settings of
CP.11
to
CP.17
of CH1
or
CP.21
to
CP.27
of CH2, and the PID
constant to be used according to the SP
value is automatically selected to calculate
the control output.
PID set No. (CH1)
PID set No. (CH2)
1 2 3 4
1 1 2 2
PID set segment designation
SP2
SP1
All SP ranges are
divided into eight zones.
PID set automatic switching (CH1)
Zone 8
Zone 7
Zone 6
Zone 5
Zone 4
Zone 3
Zone 2
Zone 1
CP.17
CP.16
CP.15
CP.14
CP.13
CP.12
CP.11