Mitsubishi Q Mode, Programming Manual

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4 - 13
MELSEC-Q/QnA
4. FUNCTIONS OF PID CONTROL
4.3.5 Changing the PID control data or input/output data setting range (QCPU only)
The setting ranges of the following data of the PID control data (refer to Section 5.1)
and I/O data (refer to Section 5.2) can be changed as desired by user setting.
Item Set Data
MV lower limit value
MV upper limit value
MV change rate limit value
PID control data
PV change rate limit value
SV
PV
Automatic MV
PV after filtering
I/O data
Manual MV
To make the user setting valid, turn the bit corresponding to the relevant loop of the
PID limit setting special register (SD774, SD775, SD794, SD795) to "1".
PID Limit Setting Special Register
Incomplete derivative Complete derivative
Setting Range
SD794 SD774
0/1
b15
0/1
b14 b13 b12 b11 b10 b9 b8 b7 b6 b5 b4 b3 b2
0/1
b1
0/1
b0
LOOP 15
LOOP 16 LOOP 1
LOOP 2 LOOP 8
0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1
SD795 SD775
0/1
b15
0/1
b14 b13 b12 b11 b10 b9 b8 b7 b6 b5 b4 b3 b2
0/1
b1
0/1
b0
LOOP 31
LOOP 32 LOOP 17
LOOP 18
0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1
0: With PID limit (system fixed value)
1: Without PID limit (user setting)
POINT
The Basic model QCPU has 8 loops.
b0 to b7 of SD774 and SD794 are valid.