YOKOGAWA UT55A - Chapter 12: Contact Input;Output Functions; 12.1 Setting Contact Input Function

12-1
IM 05P01C31-01EN
ContactInput/OutputFunctions
12
12.1 Setting Contact Input Function
12.1.1 Setting Contact Input Function
Description
The contact input function works by setting the contact input number (I relay) to functions
such as the operation mode.
This
explanationassumes
thatthecontacttypeisenergized.(Thefunctionisexecuted
when the contact is turned on)
AUTO/MANSwitch(A/M)
AUTO/MAN mode can be switched using contact input. (Status switch)
Contact status Operation Remark
ON AUTO Switch by keystroke or via communication is disabled.
OFF MAN Switch by keystroke or via communication is enabled.
AUTO/MAN switch is disabled in Cascade control or Cascade secondary-loop control.
REMOTE/LOCALSwitch(R/L)
REMOTE/LOCAL mode can be switched using contact input. (Status switch)
Contact status Operation Remark
ON REMOTE Switch by keystroke or via communication is disabled.
OFF LOCAL Switch by keystroke or via communication is enabled.
In Cascade control, the LP2 lamp is lit while the Loop-2 parameter is displayed.
STOP/RUNSwitch(S/R)
STOP/RUN mode can be switched using contact input. (Status switch)
Contact status Operation Remark
ON STOP
WhentheST
OP/RUNswitchisassigned(S/R≠0),
switch by keystroke or via communication is disabled.
OFF RUN –
SwitchtoCascade(CAS)
In Cascade control, the mode can be switched to CAS (cascade) using contact input.
(Switch by the rising edge)
Contact status Operation Remark
OFF→ON Switch to CAS (cascade) –
ON→OFF Maintains the current operation status –
SwitchtoAUTO(AUTO)
In Cascade control, the mode can be switched to AUTO using contact input. (Switch by
the rising edge)
Contact status Operation Remark
OFF→ON Switch to AUTO –
ON→OFF Maintains the current operation status –
Chapter12ContactInput/OutputFunctions