Checking Operation Restrictions - Omron E5AK User Manual

CHAPTER 8 TROUBLESHOOTING

8.4 Checking Operation Restrictions

8--6
With the E5AK controller, auto-tuning or self-tuning sometimes do not
operate depending on the way functions are combined. The table below
summarizes the main operating restrictions.
If the E5AK controller is not operating properly, first check whether
operating conditions violate the restrictions in this table.
Restriction Restriction
ST Execution
At analog input
¢
At heating and
¢
cooling control
At position-pro-
¢
portional control
At ON/OFF
¢
control
ST = ON
At AT execution --
At stop
¢
Items marked by a "x" indicates combinations of conditions not acceptable during ST or AT execu-
tion.
Items marked by " ---" are impossible combinations.
Inoperable or Invalid Functions
AT Execution Limiter Function
40%AT
40% AT
Manipulated variable
Manipulated variable
¢
MV change rate
Manipulated variable
¢
MV change rate
MV change rate
Manipulated variable
¢
MV change rate
Other
ON/OFF control
SP ramp function
Parameter setting