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x You can check the parameters setting and read the information of the instrument
by sending the following serial commands:
Command
G0
G2
G3
G4
L1
L2
L3
L4
P0
x When finished, reposition the ADDRESS jumper
"ADDRESS" and "N =" to restore the MODBUS mode.
R
EADING OF THE MEASURES WITH THE
INSTRUMENT IS IN OPERATING CONDITIONS
In MODBUS mode, you can read the values measured by the instrument through the
function code 04h (Read Input Registers). The following table lists the quantities
available with the appropriate register address:
Address
0
Temperature in °C (x10)
1
Temperature in °F (x10)
2
Relative Humidity in % (x10)
3
Dew Point in °C (x10)
4
Dew Point in °F (x10)
Status register
5
Response
Description
Transmitter Model
Serial number of the transmitter
Firmware Version
Firmware Date
Address
Read RS485 address
Baud Rate
Read RS485 Baud Rate
(0,1)
0 Ÿ 9600
1 Ÿ 19200
Tx Mode
Read RS485 transmission mode
(0,1,2,3,4,5)
0 Ÿ 8-N-1
1 Ÿ 8-N-2
2 Ÿ 8-E-1
3 Ÿ 8-E-2
4 Ÿ 8-O-1
5 Ÿ 8-O-2
Rx Mode
Read receiving mode after RS485 transmission
(0,1)
0 Ÿ Violates the protocol and gets in listen mode
1 Ÿ Respects the protocol and waits 3.5 characters after
&
Ping
bit 0 = 1 Ÿ temperature measurement error
bit 1 = 1 Ÿ humidity measurement error
bit 2 = 1 Ÿ dew point calculation error
bit 3 = 1 Ÿ configuration data error
immediately after Tx
Tx
MODBUS-RTU
(
INSTALLED IN A NETWORK
Quantity
- 2 -
between the indications
PROTOCOL WHEN THE
)
Format
16-bit Integer
16 bit Integer
16-bit Integer
16 bit Integer
16-bit Integer
16-bit Integer
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