272
3-6
AT (Expansion Mode)
To enter the Expansion Mode, change the connection of jumper connector from
2-3 to 1-2.
SW1
MODE
TEST
Change this connection.
Do not change this connection. This is for factory-use only.
MODE
MODE
1
3
1
3
Default setting
Expansion Mode
Change the connection to 1-2
Left-side View of the Unit
By executing AT (auto-tuning), the most suitable PID parameters can be set.
The AT function allows PID parameter calculation by recognizing the character-
istics of the object from the waveform (amplitude and period) to be generated
when ON/OFF control is executed (refer to the following diagram). The PID pa-
rameters obtained will be refreshed automatically, and after completion of auto-
tuning, the Temperature Control Unit will start operating using the parameters.
SP
0
Auto-tuning starts
Auto-tuning completes
Limit period with 100%
controlled variation width
Auto-tuning can be started by taking the following procedure on the Program-
ming Console.
Default: SP = 100
°
C and PV = 98
°
C
AT (Expansion Mode)
Section 3-6
Содержание CQM1H - 08-2005
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