11. TROUBLESHOOTING
IMR01N12-E7
124
Continued from the previous page.
Problem Possible
cause
Solution
Autotuning (AT) function not
activated
Requirements for performing the
Autotuning (AT) function are not
satisfied
Satisfy the requirements for
performing the Autotuning (AT)
function by referring to
AT action
(P. 96)
.
“2: No AT function” is selected as the
AT action.
Set the AT action to “1: AT function
(PI)” or “0: AT function (PID)” by
referring to
AT action (P. 96)
.
However, this is limited only to when
the AT action can be changed.
Autotuning (AT) suspended
Requirements for suspending the
Autotuning (AT) function are
established
Identify causes for Autotuning (AT)
suspension by referring to
AT action (P. 96)
and then remove
them. Then, execute the autotuning
(AT) function again.
Acceptable PID values cannot
be calculated by Autotuning
(AT)
The Autotuning (AT) function does
not appropriately much the
characteristics of the controlled object
Set PID constants manually.
The Output change rate limiter is set
Set PID constants manually.
No output change in step
The Output change rate limiter is set
Set the Output change rate limiter to
“0.0: OFF” by referring to
8.12
Control 1/Control 2
(P. 87)
.
However, this is limited only to when
the Output change rate limiter setting
can be changed.
11.3 Operation
Problem Possible
cause
Solution
Output does not become more
than (or less than) a specific
value
The Output limiter is set
Change the Output limiter setting
by referring to
8.12 Control 1/Control 2 (P. 87).
However, this is limited only to when
the Output limiter setting can be
changed.
No setting change can be made
by key operation
Set data is locked
Release the set data lock by referring
to
Set lock level (P. 49)
.
Continued on the next page.