RWB II PLUS MICROPROCESSOR CONTROL
OPERATION
S70-200 OM
Page 9
*Display for illustrative purposes only.
SECURITY DISPLAY *
SECURITY DISPLAY: Thu 10-01-87 15:33:36
Setpoints Access---[Enabled ] Keyboard
Enter Access Code---[*****]
Press F2 To Exit
The [F2] function key will call up the Security display. The
Security display allows the operator to either enable or dis-
able the microprocessor’s keyboard and, thereby, prevent
unauthorized tampering with the various adjustable setpoints.
When enabled, the microprocessor keyboard is fully opera-
tive and the security lockout is not in effect. When disabled,
the keyboard is rendered partially nonfunctional. All displays
will still be accessible through the keyboard. If any attempt
is made to enter new adjustable setpoints, however, the mi-
croprocessor will default to the Security display.
TO ENABLE THE KEYBOARD, press the [STEP] key so
that the brackets beside Enter Access Code flash, key the
proper five digit access code, and press [ENTER]. The Set-
points Access will toggle from disabled to enabled and ad-
justable set point entry is now possible.
TO DISABLE THE KEYBOARD, press the [F2] function key
to call up the Security display. Press the [STEP] key until
the brackets beside Enter Access Code flash, key the proper
five digit access code, and press [ENTER]. Now, press the
[STEP] key until the brackets beside Setpoints Access flash
and press the [CHANGE] key to toggle from enabled to dis-
abled.
TO CHANGE THE ACCESS CODE, press the [F2] function
key to call up the Security display. Press the [STEP] key
until the brackets beside Enter Access Code flash, key the
proper five digit access code, and press [ENTER]. Now,
select the Enter Access Code a second time by pressing
the [STEP] key until the brackets beside Setpoints Access
flash, key in the new five digit access code, and press [EN-
TER].
NOTE: Power loss will not effect the Security display.
NOTE: IF NO ACCESS CODE WAS ENTERED AND THE
DISABLED COMMAND WAS SELECTED, THE ACCESS
CODE IS [00000].
LOST OR FORGOTTEN ACCESS CODE: Consult Frick
Company for assistance.
SETBACK DISPLAY *
SETBACK DISPLAY: Thu 10-01-87 15:33:36
Press F1 To Exit
Setback Setpoint-[05.0 g ] Active-[No ]
Start Stop Start Stop
Mon-[--:--]-[06:00] Fri-[16:00]-[--:--]
Tue-[--:--]-[--:--] Sat-[--:--]-[--:--]
Wed-[--:--]-[--:--] Sun-[--:--]-[--:--]
Thu-[--:--]-[--:--]
The [F3] function key will call up the Setback display. The
Setback feature enables automatic operation at two sepa-
rate suction conditions on a preset time schedule. Having
entered the desired Setback setpoint, enter the start and
stop time or times, and select Active: (Yes) or (No).
NOTE: To change the Setback setpoints, refer to “TO
CHANGE THE ADJUSTABLE SETPOINTS”
AUTO CYCLE DISPLAY *
AUTO CYCLE Thu 10-01-87 16:33:36
DISPLAY: Press F1 To Exit
Suction Pressure--------[20.0 g ]
Compressor Start--------[20.0 g ]
Compressor Stop---------[18.0 hg]
Minimum Slide Valve-----[00%]
Auto Cycle Active-------[No ]
The Auto Cycle display provides for independently adjus-
table setpoints to turn the compressor on and off in response
to the suction pressure or as an adjustable setpoint to limit
the minimum slide valve position.
NOTE: To change the Auto Cycle setpoints, refer to
“TO CHANGE THE ADJUSTABLE SETPOINTS”
SUCTION PRESSURE - Constantly monitors and displays
the suction pressure in pounds per square inch gauge (g) or
inches of mercury (hg).
COMPRESSOR START - Compressor Start-up will bring
the compressor back on line when the suction pressure rises
to the displayed setpoint.
COMPRESSOR STOP - Compressor Stop will shut down
the unit if the suction pressure drops to or below the dis-
played setpoint limit. NOTE: This limit must be set higher
than Low Suction Pressure Cutout and the Low Suction Pres-
sure Alarm setpoints.
MINIMUM SLIDE VALVE - Minimum Slide Valve Position,
shown as a percentage, will limit the slide valve position to
the displayed setpoint.
AUTO CYCLE ACTIVE - Indicates whether Auto Cycle is
active (YES) or not active (NO). Press the [CHANGE] key
while at this setpoint to change the status. Upon deactiva-
tion, the compressor will return to the previous mode of op-
eration.
ANALOG OFFSET DISPLAY*
ANALOG OFFSET:
Suc Disch Oil Sep Filt Spare Econ
Temp +0 +0 +0 +0 +0.0
Pres +0.0 +0 +0 +0 +0
Channel 10 12 13
Press +0 +0 0
The Analog Offset Display is accessed by pr/- key.
All analog values can be or - 3 to 9 units depending
on which value is being adjusted. Use the [STEP] key to
step to the desired setpoint. Press the [CHANGE] key to
change the value of the offset by 1. The actual analog value
will be displayed on the top line of the display. The “Econ”
and channels 10, 12, 13 are displayed but do not pertain to
the standard program.
