Logic Operations; The Logic Operation Function (Cx-Thermo); Using Logic Operations - Omron E5CN-HT User Manual

Logic Operations

Manual Operation
MV at Reset/MV at Error

4-24 Logic Operations

4-24-1 The Logic Operation Function (CX-Thermo)

4-24-2 Using Logic Operations

Starting Logic
Operations
With models that support position-proportional control, manual operation is
possible by moving to the manual control level and pressing the Up and Down
Keys. The output on the open side is ON while the Up Key is pressed, and the
output on the closed side is ON while the Down Key is pressed. If the Direct
Setting of Position Proportional MV parameter is set to ON and closed control
is used, however, the Manual MV parameter can be set with the same display
and operations as for standard models.
With floating control or when the Direct Setting of Position Proportional MV
parameter (pvmd) is set to OFF, select to open, close, or hold the status of the
output when resetting (when the operation at reset is set to stop control) or
when an error occurs. Set the MV for when the Direct Setting of Position Pro-
portional MV parameter (pvmd) is set to ON for closed control.
• The logic operation calculates the Controller status (alarms, run/reset,
auto/manual, etc.) and the external event input status as 1 or 0, and out-
puts the result to a work bit. The work bit status can be output to auxiliary
or control output, and operating status can be changed according to the
work bit status.
• Work bit logic operation can be set from 1 to 8. Set them to No operation
(Always OFF) (the default) when the work bits are not to be used. When
logic operations are being used, a dot will be displayed on the No. 2 dis-
play of the adjustment level display
Adjustment Level
Adjustment level display
l.adj
.
Logic operations are set using the CX-Thermo.
There are two ways to start logic operations.
• Select Logic Operation Editor from the CX-Thermo tree, and click the
Start Button.
Dot displayed.
Section 4-24
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