Mitsubishi Electric MELSEC Q Series User Manual page 44

3 SPECIFICATIONS
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(2) Executing auto-tuning
(a) Auto tuning is performed in the following procedure.
Q64TC data setting
Operation mode setting
Auto tuning start
Auto tuning in progress
Auto tuning completion
(PID constants set)
Temperature control using
PID constants set
(b) Conditions for starting auto-tuning
When any of the following conditions is met, auto-tuning is not executable.
1) The Operation mode status (Xn1) is off (setting mode).
2) In Proportional band (P) setting (buffer memory address: 23
63
H
3) In AUTO/MAN mode switching (buffer memory address: 32
92
H
4) In Unused channel setting (buffer memory address: 3D
9D
H
5) Forced PID control stop command (YnC to YnF) is on.
6) Hardware failure is identified. (The ERR. LED turns on.)
7) Temperature process value (PV) (buffer memory address: 9H to CH)
exceeds the measured temperature range (Refer to Section 3.5.4).
8) In E
3E
H
9) A bit of write flag in E
(buffer memory address: 1F
For conditions 1) to 5), auto-tuning starts as soon as the condition is
changed.
For conditions 6) and 7), Auto tuning status (Xn4 to Xn7) turns on
momentarily. The auto tuning does not start until Auto tuning command
(Yn4 to Yn7) turns from off to on again even if the condition is changed.
For conditions 8) and 9), even if internal processing of auto tuning is
completed and PID constant is stored, Auto tuning status (Xn4 to Xn7)
does not turn off and auto tuning is not completed.
search engine
, 83 ), 0 is set. (2-position control)
H
), 1 (Manual) is set.
), 1 (Unused) is set for the channel.
2
PROM's PID constant read command (buffer memory address:
, 5E , 7E , 9E ), 1 (With command) is set.
H H H
2
PROM's PID constant read/write completion flag
) is on.
H
MELSEC-Q
Set to the buffer memory addresses
indicated in (1), (b).
Turn on Operation mode command
(Yn1).
Confirm Operation mode status
(Xn1) is on.
Turn on Auto tuning start command
(Yn4, Yn5, Yn6, Yn7).
Auto tuning status
(Xn4, Xn5, Xn6, Xn7) turns on.
Auto tuning status
(Xn4, Xn5, Xn6, Xn7) turns off and
the calculated values are set to
the buffer memory addresses
indicated in (1), (c).
, 43
H
, 52
H
, 5D , 7D
H H
,
H
, 72 ,
H H
,
H
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