App.-2
Appendix
DI (digital input)
External contact input
Used to switch remote/local, multiple SPs, auto/manual, etc., of controllers, etc.
DO (digital output)
External output
An ON/OFF signal is output to external devices from control output terminals,
relay terminals, and event output terminals.
E
EV (event)
Event output
A function of a controller or recorder that determines process (PV) abnormalities,
etc., independently from the main control. A function to output abnormalities as
alarms is also expressed as EV. Used with PV high/low limit alarm, deviation high/low
limit alarm, etc. It is also possible to output the mode of a device (ready, manual, etc).
I
I (integral)
I action (integral action)
A control action in which the amount of change in correction is proportional to
the integrated value of the deviation. When an offset occurs, integral action works
to eliminate the offset by changing the manipulated variable. I action is not used
alone, but always with proportional action.
L
LSP (local set point)
Local SP
The SP stored in the device. For the C1M, LSP has the same meaning as SP.
M
Motor feedback (MFB)
Motor opening
The opening signal sent from the motor controlled by a controller. The C1M does
not have an MFB function.
MV (manipulated variable)
A signal sent to an actuator. It is also called “control output.”
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