Watlow 1500 control (cont.) – Despatch 1500 Controller User Manual
Page 11
Despatch/Watlow 1500 Control Instruction Manual
Page 5
Key
Description
CH SEL
Selects either channel 1 or channel 2 for the ACTUAL display.
CLEAR
Clears alarm codes from the FUNCTION display in the monitor data mode.
Clears the step in the STEP display in the change data mode when the unit
is in the halt condition. Clears all 51 programmed steps when the unit is in
the halt condition, and in the guarded access area of the change parameter
mode.
RE-START
Returns the controller to the initial program step only in the program halt
condition.
RUN/HALT
Starts or stops the program. The processor will resume a program where it
was interrupted, unless the RESTART key was pressed, or the step number
or set point data at the current step was changed during the halt condition.
MODE
Selects either the monitor data, change data or change parameter mode.
FCTN
The FUNCTION key steps through the prompts in each of the three modes.
ENTER
Enters the selected data or next step operations in the change data and
change parameter modes.
Increases and decreases the value in the DATA display. A light touch
changes the value by one. Holding the key down causes the DATA display
to increase rapidly.
Table 2 Watlow 1500 Keys
LED
Description
CH-1 CH-2
Indicates the channel in the ACTUAL display.
EE
F
Indicates the value in the ACTUAL display is temperature in
E
F.
EE
C
Indicates the value in the ACTUAL display is temperature in
E
C.
%RH
Indicates the value in the ACTUAL display is per cent relative humidity.
PROG END
Indicates that the processor has reached the end of the program.
PROG HALT
Indicates that the processor is in the halt condition. This may be caused by
pressing the RUN/HALT key or by a blank step in the program. Flashing
indicates that the processor is in remote-hold condition.
MNTR
DATA
Indicates the processor is in the monitor data mode. While in this mode the
Watlow 1500 is used as a set point controller or a process profiler.
CHG DATA
Indicates the processor is in the change data mode.
CHG PARA
Indicates the processor is in the change parameter mode.
TIME
Indicates that the FUNCTION and DATA displays are showing time.
Table 3 Watlow 1500 LEDs
Watlow 1500 Control (Cont.)