Carbon Monoxide Transmitter Modbus
Installation Manual
May 5, 2017
IN-CMD5B4MOD-01-01 Page 8
23.
BackLite
Use the <ROLL> key to enable or disable the LCD backlight. When enabled the backlight is always on and
Enable
when disabled it never lights. Press <SAVE> to save the setting. The factory default is Enable.
<MENU>
24.
Out Type
Use the <ROLL> key to toggle the voltage output type to either 0-5 Vdc or 0-10 Vdc. Press <SAVE> to
0-5 Vdc
save the setting. The factory default is 0-5 Vdc. Note that this item is only shown if the pcb switch is in the
VOLT position. Also note that the output type can only be changed by disconnecting the power to the unit.
<MENU>
25.
Output
Use the <ROLL> key to scroll through the available options. The output and display depends on the output
Test OFF
type configuration. For 4-20 mA output the settings are OFF/4/8/12/16/20 mA, for 0-5 Vdc output they are
OFF/0/1/2/3/4/5 Vdc and for 0-10 Vdc output they are OFF/2/4/6/8/10 Vdc. This can be used to test the
output
signal.
<MENU>
The next steps are only shown if the ModBus communication protocol is installed.
26.
ModBus
Use the <ROLL> key to select a unique slave address from 1-255. Press <SAVE> to save the change. The
Addr 01
factory default ModBus slave address is 1. Each device on the network must have a unique address.
<MENU>
27.
BaudRate
Use the <ROLL> key to select a baud rate of 300, 600, 1200, 2400, 4800, 9600 or 19200. Press <SAVE>
9600
to save the setting. The factory default ModBus baud rate is 9600.
<MENU>
28.
TranMode
Use the <ROLL> key to toggle between RTU and ASCII modes. Press <SAVE> to save the setting. The
RTU
factory default ModBus transmission mode is RTU.
<MENU>
29.
Parity
Use the <ROLL> key to select a parity value of None, Odd or Even. Press <SAVE> to save the setting.
None
The factory default ModBus parity bit is None.
<MENU>
30.
StopBit
Use the <ROLL> key to toggle the stop bit setting between 1 and 2
(for some configurations the value is
1
fixed)
. Press <SAVE> to save the setting. The default ModBus stop bit setting is 1.
<MENU>
31.
CRC Mode Use the <ROLL> key to set the CRC value to A001 (CRC-16 reverse), 1021 (CITT), 8005 (CRC-16), or
A001
8408 (CITT reverse), then <SAVE> the value. The default RTU mode CRC polynomial is OxA001.
<MENU>
32.
Delay
Use the <ROLL> key to change the value from Minimum to 50, 100, 150, 200, 250, 300 or 350mS, then
Minimum
<SAVE> the value. The factory default ModBus slave response delay is Minimum
(minimum delay means
just more than 3.5 character time delays, 4ms for 9600 baud rate, for example).
<MENU>
