6 - 5 Manual Operation and Auto-Tuning
6-12
■ Manual operation
The and keys can be used to control instrument outputs in the MANUAL
mode.
● Controller function operations
When outputs are indicated in the basic display status, only one digit in the output
value flashes. Increasing or decreasing the output value using and keys
causes the actual output to change accordingly. Unlike setting registration, there is
no need to press the ENTER key.
Use the and keys to move the flashing digit.
Setup data C35 is used to select smooth and preset output changes when going
from AUTO to MANUAL modes.
Changes from MANUAL to AUTO are smooth.
(Note, however, that when the integral time setting for a PID group PID parameter
of 0 may cause abrupt changes.)
● Programmer function operations
SP can be set manually when setup data C21 is set to 0 and programmer functions
operate.
When SP is indicated in the basic display status, only one digit in the output value
flashes. Increasing or decreasing the SP value using and keys causes the
actual SP value to change accordingly. Unlike setting registration, there is no need
to press the ENTER key.
Use the and keys to move the flashing digit.
Regardless of setup data C35 setting, output changes going from AUTO to
MANUAL modes are smooth.
Changes from MANUAL to AUTO program pattern SP are used and abrupt output
changes may occur.
■ Auto-tuning (AT)
Set values can automatically be written when using auto-tuning (AT) in the RUN,
HOLD, FAST and END modes during AUTO mode operation and PID groups (1
to 9, A1 to A7 or constant value control) are being used.
In READY AUTO mode, the tuning points of PID parameters tP-A1 to tP-A7
settings can be used as SP to perform auto-tuning of PID groups A1 to A7 values.
Variable parameter PA08 allows the following selections:
0: AT is not performed.
1: A general AT operation of a PID group used in a mode other than
READY mode
2: AT of PID values that do not easily overshoot can be written to a PID
group used in a mode other than READY mode.
3: A standard AT operation is repeatedly performed on PID groups A1 to
A7 in READY mode.
4: Repeated AT of PID values that do not easily overshoot can be written
to PID groups A1 to A7 used in READY mode.
• During auto-tuning, program run time stops. Thus the RUN and FAST modes
are changed to the HOLD mode.
Chapter 6. OPERATION
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