Middleby Marshall PS638 Series, Owner'S Operating And Installation Manual

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27
III. OTHER ADJUSTMENTS (MANAGER MODE)
A. PLC S
YSTEM
C
ONTROL AND
O
PERATION
When the PS638 Oven, Display, and PLC
are powered up by the ON-OFF Rotary
Switch, the following screen will appear:
Setting Temperature, Baking
Hertz, and Belt Speed
Press the yellow HZ box on the main
screen to pop the following M
ENU
S
ETTING
:
To change any set point, press on its box,
which will bring up a keypad screen.

Press the TEMPERATURE block, to
change temperature, then press “ENT”
button. Temperature set point is
adjustable with the oven on or off.

Press the [Bake] TIME block to enter a
new bake time.

Press the BLOWER HZ block to
change the BAKING Hertz setting.
When finished making bake adjustments,
press the BACK button.
WAIT
for the
main screen to display
READY
. Now the
oven is at the proper belt speed and
temperature for baking.
Pressing on the Temp Display –
brings
up the set-point and actual temperature
displays. There is also a button to
enable/disable the optional photocell.
The
MONITORING SCREEN
Button
activates the next menu:
This is a monitoring screen, which not
only shows you temperatures and
encoder readings, but also PLC input and
relay status. It also shows what type of
oven the PLC is programmed for.