22
Chapter 3. Operation
Tur
n-
do
wn t
est or c
ommunica
tion settings
•
Initialization of settings (
CL
)
Use the DISP switch to select
CL
on the 7-segment display.
1. Press the RESET switch. The 7-segment display shows
CL
/
nO
.
2. When the DISP switch is pressed in this situation,
the display toggles between
CL
/
nO
(no) and
CL
/
y
(yes). Select
whether to initialize all the communication settings.
CL
/
y
Execute initialization
CL
/
nO
Cancel initialization
3. After making a selection, press the RESET switch. “
CL
” blinks,
and when the blinking stops, initialization of settings is
complete.
Settings after initialization
Display
Description
Initial value
H
1
Communication address
setting
1
H2
Baud rate setting
3: 19200 bps
H3
Communications format
setting
1: Even parity, 1 stop bit
4. After initialization, check the settings and change them as needed.
Exit
(3) Press and hold the DISP switch for 5 s or more to end the turn-
down test or communication setting mode. Turn-down test and
communication setting modes also end in the following cases:
• When the power goes OFF
• When a warning is issued during the turn-down test or
communication setting mode (in continuous pilot burner
combustion mode).
z
Operation when the dot at the lower right of the 7-segment LED is blinking
If the communication settings are not correctly configured during communication
setup due to a power shutdown or other cause, this device is locked out due to
communication settings error E971 and the 7-segment display alternately shows
E9
and
71
. If lockout occurs due to E971, correctly rewrite the communication settings
with the following procedure.
(1) Reset the E971 error. The reset operation returns the communication settings
to the following initial values.
Communication address setting : 1
Baud rate setting
: 3 (19200 bps)
Communications format setting : 1 (even parity, 1 stop bit)
(2) Enter the communication setting mode and rewrite the communication
settings with the correct values.
