INW - PT2X Instruction Manual
29
Power Consideration
If your sensor does not have internal batteries and is not powered continuously by an
auxiliary power supply, then you must turn power on to the sensor at least two seconds
before a reading is to be taken to allow the sensor to warm up.
Reading Via Modbus
®
RTU
Setting Baud Rate
Your PT2X 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 PT2X 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 PT2X, 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
Aqua4Plus 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. (PT2X 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.)
