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7. Operation
After the unit is mounted to the control panel (DIN rail) and wiring is completed, operate the unit
following the procedure below.
(1) Turn the power supply to the DCL-33A ON.
For approx. 3 seconds after power is turned on, sensor input characters and temperature unit are
indicated on the PV Display, and the input range high limit value is indicated on the SV Display.
See (Table 5-1) on p.11. During this time, all outputs and LED indicators are in OFF status.
(If any other value is set in [Scaling high limit], the SV Display indicates it.)
After that, the PV Display indicates PV (process variable), and the SV Display indicates SV (desired
value).
(2) Enter each set value.
Enter each set value, referring to “5. Setup”.
(3) Turn the load circuit power ON.
Control action starts so as to keep the control target at the SV (desired value).
SUB-MODE Key Function
The SUB-MODE key function differs depending on the selection in [SUB-MODE key function].
• If ‘Control output OFF’ is selected:
The control action and output of an instrument (or instruments) can be turned OFF without turning
OFF their power supplies using this function.
If the control output OFF function is enabled, and the PV Display will indicate
, turning all
outputs OFF.
By pressing the SUB-MODE key for approximately 1 second in PV/SV Display mode, the control output
OFF function will be enabled.
In setting mode, if the SUB-MODE key is pressed for approximately 3 seconds, the control output OFF
function will be enabled.
If the SUB-MODE key is pressed for approximately 1 second again, the function will be cancelled, and
the unit will return to PV/SV Display mode.
• If ‘Auto/Manual control’ is selected:
Auto/Manual control can be switched.
Each time the SUB-MODE key is pressed for approximately 1 second in PV/SV Display mode,
Automatic or Manual control can be switched.
• If ‘Alarm HOLD cancel’ is selected:
Alarm Hold can be cancelled for the Alarm with Hold function.
If the SUB-MODE key is pressed for approximately 1 second in PV/SV Display mode, Alarm Hold
cancel function will be enabled.
In setting mode, if the SUB-MODE key is pressed for approximately 3 seconds, the Alarm HOLD
cancel function will be enabled.
Event Input
Event Input DI action has priority over key operation.
Set value memory external selection (EI option)
By closing or opening the Event Input DI contact, SV1 and SV2 can be selected.
Depending on the selection in [Event input DI allocation], the following differences result in:
If 001 (Set value memory) is selected in [Event input DI allocation]:
Event input DI Open: SV1
Event input DI Closed: SV2
If 008 (Set value memory) is selected in [Event input DI allocation]:
Event input DI Open: SV2
Event input DI Closed: SV1
Summary of Contents for DCL-33A
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