Omega Engineering CN 79000 Thermostat User Manual


 
Page 14 of 40
FACTORY DEFAULT PROCEDURE
If for any reason you wish to restore the factory settings use the following
procedure.
1. Turn off power to control
2. Turn on power to control
3. While control is performing
SELFSELF
SELFSELF
SELF
tESttESt
tESttESt
tESt, press and hold the INDEX
and ENTER keys.
4. The control will display the ROM ID code. Press INDEX.
5. The control will display
FACtFACt
FACtFACt
FACt
dFLtdFLt
dFLtdFLt
dFLt. If you wish to just restore factory
settings, Press ENTER and DOWN ARROW at the same
time. The control will be reset to the original factory settings.
6. Press INDEX to display
OPtOPt
OPtOPt
OPt. If your control is equipped with an
option, press the UP ARROW to display the option number. If the
number is flashing, press ENTER. An enabled option does not
flash.
7. Press INDEX to display
ACPtACPt
ACPtACPt
ACPt. Select
YESYES
YESYES
YES or
nono
nono
no.
YESYES
YESYES
YES Changes are accepted and control re-boots.
nono
nono
no Changes are discarded and control re-boots.
8. Press ENTER.
The control will re-initialize with Factory Default settings.
THE BAUD RATE AND ADDRESS MENU ITEMS WILL TAKE EFFECT ON THE
NEXT POWER UP OF THE CONTROL. BE SURE TO POWER CYCLE THE
CONTROL BEFORE USING THE NEW BAUD RATE AND ADDRESS
.
In operation, you have the option of preventing a write command from the host
computer. To prevent the host from writing to the control change the
LOrELOrE
LOrELOrE
LOrE menu
item in the Secondary Menu to
LOCLOC
LOCLOC
LOC. To allow the host to write commands to
the control set
LOrELOrE
LOrELOrE
LOrE to
rErE
rErE
rE. (The host does have the ability to change the
LOrELOrE
LOrELOrE
LOrE
state, but it is not automatic.)
If your system depends on constant reading or writing to and from the host, you
may wish to set the No Activity Timer (
nAtnAt
nAtnAt
nAt) to monitor the addressing of the
control. When the
LOrELOrE
LOrELOrE
LOrE is set to
rErE
rErE
rE and the
nAtnAt
nAtnAt
nAt is set to any value other than
Off, the control will expect to be addressed on a regular basis. If the control
is not addressed in the time set by the value of
nAtnAt
nAtnAt
nAt, then the control will display
the error message
CHEC LOrECHEC LOrE
CHEC LOrECHEC LOrE
CHEC LOrE. To clear the message set
LOrELOrE
LOrELOrE
LOrE to
LOCLOC
LOCLOC
LOC.