Cermet II User’s Manual
20
97049 Issue 25.3, October 2016
OPERATION
3.6
Display Brightness Adjustment
1.
To adjust the display brightness press the
SETUP
and
buttons
simultaneously.
2.
The display toggles between [
bri
] and [
5
], where 5 is the default
setting.
3.
Adjust the display brightness required (from 0 to 7) by pressing the
or
buttons.
4. Press
SETUP
seven times to exit the programming mode.
3.7 Digital
Communications
The monitor is
fi
tted with ASCII RS232 communication interface as standard (RS485
optional). Communication settings are found as follows:
1.
Set CAL to
100.
2. Press
SETUP
once and then the
or
buttons to change the baud rate.
Baud rates are 300, 600, 1200, 2400, 4800, 9600, 19,200 and 57.6 K.
3. Press
SETUP
again to advance to the parity bit and then the
or
buttons to change the parity bit. Parity settings are odd, even or off.
4. Press
SETUP
again to advance to the address settings. Address settings
are 0 to 255.
NOTE: address 0 is not a valid RS485 address.
5. Press
SETUP
again to return to CAL.
The default communication con
fi
guration is:
Baudrate
9600
Data bits
8
Parity
none
Flow control
none
The commands used to read and write to the monitor follow the protocol shown below:
Start Character
s
or
S
for the start character (must be
fi
rst character in
string).
Meter Address
An ASCII number from
0
to
255
for the meter address.
Read/Write The next character must be an ASCII
R
or
r
for read, or an ASCII
W
or
w
for write. Any other character will abort the operation.
