103
Using Event Inputs Section 4-5
Note (1) PRST (Program Start) can be set even when the Program Pattern param-
eter is set to OFF, but the function will be disabled.
(2) This function can be set for heating/cooling control, but the function will
be disabled.
When any of the following functions is set for an Event Input Assignment
parameter, the same function cannot be set for another Event Input Assign-
ment parameter: STOP (RUN/STOP), MANU (Auto/Manual Switch), PRST
(Program Start), DRS (Invert Direct/Reverse Operation), AT-2 (100% AT Exe-
cute/Cancel), AT-1 (40% AT Execute/Cancel), WTPT (Setting Change Enable/
Disable), or LAT (Alarm Latch Cancel). Turn event inputs ON and OFF while
the power is being supplied. Event input ON/OFF changes are detected for
inputs of 50 ms or longer. (However, inputs of 250 ms or longer is determined
using logic operations.)
The functions are described in detail below. Event inputs 1 and 2 are taken as
examples.
Executing Run/Stop
Control
When the Event Input Assignment 1 or Event Input Assignment 2 parameter
is set to STOP (RUN/STOP), control is started when event input 1 or 2 turns
OFF. Control is stopped when the input turns ON. Alarm outputs, however, will
be according to the process value.
The STOP indicator will light while control is stopped.
Switching between
Auto and Manual
Control
When the Event Input Assignment 1 or Event Input Assignment 2 parameter
is set to MANU (auto/manual), manual control will start when event input 1 or
2 turns ON. Auto control will start when the input turns OFF.
The MANU indicator will light during manual control.
Controlling the Start
of the Simple
Program Function
When the Event Input Assignment 1 or Event Input Assignment 2 parameter
is set to PRST (program start), the program will start when event input 1 or 2
turns ON. The program will be reset when the input turns OFF and the RUN/
STOP status will automatically switch to STOP mode. If the program END out-
put is ON, the program END output will turn OFF.
Control by Inverting
Direct/Reverse
Operation
When DRS (Invert Direct/Reverse Operation) is set for the Event Input
Assignment 1 or Event Input Assignment 2 parameter and the Direct/Reverse
Operation parameter is set for reverse operation, control starts with direct
operation (cooling control) when event input 1 or 2 turns ON and control starts
with reverse operation (heating control) when the event input turns OFF.
Setting Input contact Status
Event input 1 or 2 ON STOP
Event input 1 or 2 OFF RUN
Setting Input contact Status
Event input 1 or 2 OFF Automatic
Event input 1 or 2 ON Manual
Setting Input contact Status
Event input 1 or 2 OFF Reset
Event input 1 or 2 ON Start
Setting Input
contact
Direct/Reverse Operation
parameter
Status
Event input
1 or 2
OFF Direct operation (cooling) Direct operation (cooling)
Reverse operation (heating) Reverse operation (heating)
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