Adjustment Level; At Execute/Cancel (At); Communications Writing (Cmwt); Heater Current Value Monitor (Ct) - Omron E5ZN Operation Manual

Adjustment Level

7-4

Adjustment Level

7-4-1 AT Execute/Cancel (at
Function
Communications
Example of Use
See Also
7-4-2 Communications Writing (cmwt
Function
Communications
Example of Use
See Also
7-4-3 Heater Current Value Monitor (ct
Function
at at at)
Condition: Operation in automatic mode with 2-PID control.
This parameter executes autotuning.
When you execute AT, the optimum PID parameters "proportional band," "inte-
gral time," and "derivative time" for the set point during program execution are
automatically set by changing the MV to calculate the characteristics of the
control target.
Use the "AT execute/cancel" operation command. Refer to page 77 for infor-
mation.
• Normally, this parameter is set to " off ". When you press the Up Key, the
parameter is turned ON and AT is executed.
AT cannot be executed when control has stopped or during ON/OFF con-
trol.
• When AT execution ends, the parameter setting automatically returns to
" off ."
• The SP flashes if "PV/SP" is monitored during AT.
• Channel settings cannot be changed during AT.
• Related Parameters
"Proportional band" "Integral time" "Derivative time" (adjustment level)
(page 124)
" PID/OnOff " (initial setting level) (page 130)
cmwt)
cmwt cmwt
This parameter enables/disables writing of parameters to the E5ZN from the
host (e.g., personal computer) by communications.
Use the "communications writing" operation command. Refer to page 76 for
information.
Set this parameter to "on" to enable writing and to " off " to disable writing.
• Related Parameters
"Communication unit No." "Baud rate" (setting switch) (page 3)
"Data bit" "Stop bit" (communications setting level) (page 145) "Parity"
"Communications response wait time" (communications setting level)
(page 146)
Condition: The "HBA used" parameter must be set to "ON".
This parameter measures the current value of the heater from current trans-
former (CT) input to detect heater burnout.
This parameter measures and displays the current value of the heater.
ct)
ct ct
Section 7-4
121