12-3
IM 05P02D41-01EN
Contact Input/Output Functions
12
Auto-tuningSTART/STOPSwitch(AT)
Auto-tuning START/STOP can be switched using contact input.
Auto-tuning is executed to the PID group currently specified. (Switch by the rising edge
and the falling edge)
Contact status Operation Remark
OFF→ON Starts auto-tuning –
ON→OFF Stops auto-tuning –
Latch Release (LAT)
Latch can be released using contact input. (Switch by the rising edge)
Contact status Operation Remark
OFF→ON Releases the latch –
ON→OFF Maintains the current operation status –
Releasing the latch function releases all latched contact (alarm) outputs.
LCDBacklightON/OFFSwitch(LCD)
LCD backlight ON/OFF can be switched using contact input. (Switch by the rising edge
and the falling edge)
Contact status Operation Remark
OFF→ON Turns off the LCD backlight –
ON→OFF Turns on the LCD backlight –
MessageDisplayInterruption1to4(MG1to4)
The message set using LL50A Parameter Setting Software can be interrupt-displayed on
PV display using contact input. The messages are limited to 20 alphanumeric characters.
A maximum of four displays can be registered. (Switch by the rising edge)
► Message: LL50A Parameter Setting Software User’s Manual
Contact status Operation Remark
OFF→ON Interrupt-displays the message
Pressing the DISPLAY key (or DISP key) erases
the message.
ON→OFF Displays the current PV –
PVRed/whiteSwitch(PVRW)
PV color can be switched using contact input. (Status switch)
Contact status Operation Remark
ON Red color –
OFF White color –
Set "10" to the parameter PCMD.
Prog/resetswitchofprogrampattern-1to-4(P1STtoP4ST)
Program pattern 1, 2, 3, or 4 can be selected. Then contact input can be used to start an
operation. Switching takes place on the rising edge.
Contact status Operation Remark
ON
Select program pattern 1 to 4 and start
operation
–
OFF Stop operation –
12.1SettingContactInputFunction
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