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INW - TempHion Instruction Manual
Reading Via Modbus
®
RTU
Setting Baud Rate
Your TempHion comes confi gured to communicate at 38,400 baud, with 8 data bits,
one stop bit, and no parity. The sensor can also be set to 19,200 or 9600 baud, if needed
for your application. You must use Aqua4Plus, not Aqua4Plus Lite, to make baud rate
changes.
If needed, set your TempHion to the desired baud rate as follows:
•
Click on the Confi gure menu, and then select Advanced.
•
From the fl yout menu, select Sensor Baud Rate. (You may be asked for a
password. Enter admin.)
•
On the popup box, click the down-arrow, select the baud rate you need,
and then click OK.
Once you have changed the baud rate on the TempHion, you will not be able to talk to it
with Aqua4Plus until you change the baud rate for Aqua4Plus, as follows:
•
Click the Options menu, and then select Baud Rate.
•
On the popup box, click the down-arrow, select the baud rate you need, and then
click OK.
The current Aqua4Plus baud rate is displayed in the lower right corner of the main
program window.
Taking Measurements
Reading Registers
Read measurements using Modbus function 03 – Read Holding Registers.
Readings are located in two registers each, starting at address 62592. (TempHion
register addressing is zero based, i.e., starts at zero. If your equipment uses one based
addressing, you will need to add one to the register addresses.)
Register Addresses for TempHion with Firmware 2.5 or higher
To read:
Zero-Based
One-Based
Temperature
62592
62593
pH in pH units
62594
62595
ISE in ppm
62596
62597
ORP in Eh
62598
62599
pH in mV
62600
62601
ISE in mV
62602
62603
ORP in mV
62604
62605
