Watlow Series F4S/D - Manual (Page 53)

Wa t l o w S e r i e s F 4 S / D S e t u p ■ 5 . 5
Andy set the compressor control parameter to have the
compressor run only when cooling is needed.
% on Power: 0%
% off Power: 9%
Off Delay: 30 seconds
On Delay: 60 seconds
There was no computer connection, so Andy skipped
Communications.
Then he left the Setup Page and went to the Factory
Page where he put a password lock on the Setup Page,
Profile Page and Factory Page.
Finally, he went to the Operations Page and set the ac-
tive alarm band:
-20°F
+20°F
Analog Input 2
The humidity sensor on analog input 2 was a process sensor using a 4 to
20 mA signal, so Andy set the high end of the scale (20mA) for 100% and
the low (4mA) for 0% relative humidity (rh). Knowing that process sensor
displays are sometimes jumpy, he put a 1-second filter on it to stabilize it.
Sensor: Process Set Point Low: 10%
Type: Vaisala Set Point High: 90%
Units: % RH No Calibration Offset
Scale Low: 0% 1-second Filter
Scale High: 100% Self-clearing Error
Analog Input 3
A thermocouple (type J) sensor
was adequate to measure the
temperature of the equipment
itself (analog input 3). The other
settings remained the same as
analog input 1.
Sensor: Thermocouple
Type: J
Decimal Point: Whole numbers
only
Alarms
He assigned an alarm output
to indicate a temperature de-
viation on input 1, which
would monitor chamber tem-
perature, and gave it a name
that would state the problem.
Name: TEMP DEV
Type: Deviation
Source: Input 1
Latch: Yes
Silencing: Self-clear
Alarm Hysteresis: 1, 1.0
Sides: Both
Condition: Close on alarm
Show: Yes
Digital Inputs
Then he set up the digital inputs for
remote functions. Digital input 1
would be wired to a key-lock switch
that requires the operator to have a
key to operate the controller and
chamber. Digital input 2 would be
wired to a door switch to stop the pro-
file if the chamber door opens.
Digital Input 1
Name: KEYLOCK
Function: Panel lock
Condition: Start on high
Digital Input 2
Name: Default
Function: Pause
Condition: High
Digital Output 6
For heating and cooling capacity
and to accommodate the com-
pressor, Andy assigned these
functions to Digital outputs 6, 7
and 8.
Digital output 6, wired to a big
auxiliary heater, was set up to
kick in only when the main
heater worked at greater than
90% power (boost power level)
for more than 20 seconds (boost
delay).
Name: BOOST HEAT
Function: Boost heat
Boost Power Level: 90%
Boost Delay: 20 seconds
Digital Output 8