IN-E-HyFlex-V4_10
Rotronic AG
Bassersdorf, Switzerland
Document code
Unit
Instruction Manual
Document Type
HygroFlex transmitter version 4: instruction
manual
Document title
Page
55
of 61
© 2006; Rotronic AG IN-E-HyFlex-V2_10.doc
Special situations (single instrument)
Using address 99 in a data request causes any instrument with any address to answer. For this
reason, address 99 should not be used when several instruments are connected to a network.
Address 99 can be useful when trying to communicate with a single instrument of unknown
address. The address is returned as part of the answer string.
When the product ID is unknown, it can be replaced with a blank in the command. The product ID
is returned as part of the answer string.
Example: { 99RDD}+CR
Examples
Data can be read from the instrument directly connected to the COM port of the PC (RS232) as
well as from any instrument that is networked (RS485). The following examples are for the
HygroFlex. The same commands can be used for other instruments with similar capabilities by
substituting the appropriate values for the product ID and address.
1) Read %RH and temperature from the HygroFlex 2 (with 2 probes) address 01, directly
connected to the PC COM port (RS232):
Data request: {CR
Answer: {m01RDD 0025.01;0016.89;0024.57;0019.84;#C
Note: 0025.01: humidity probe 1 (%RH)
0016.89: temperature probe 1 (°C as per instrument configuration)
0024.57: humidity probe 2 (%RH), etc.
2) Read %RH, temperature and computed parameter
Data request: {m01RDD0;}+CR
Answer: {m01RDD 0025.90;0015.82;-003.69;0024.47;0019.88;-001.00;S
Note: 0025.90: humidity probe 1 (%RH)
0015.82: temperature probe 1 (°C as per instrument configuration)
-003.69: dew point probe 1 (°C as per instrument configuration), etc.
3) Read %RH and temperature from the HygroFlex 3 (1 probe) with address 00, connected by
RS485 to the HygroFlex 2:
Data request |{M00RDD} +CR note: the | character (ASCII 124) preceding the command
Answer: {M00RDD 0020.41;0019.87;----.--;----.--;#E
