Lighthouse solair 3100, Operating Manual

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248083389-1 Rev C-1
C
Real Time Flow and Laser
Current via MODBUS
This Appendix will provide the user with the procedure to read the
SOLAIR 1.0 CFM counter’s flow and laser current in real time through
MODBUS.
Required
Equipment
and Software
• PC with an available RS-232C or USB COM port;
• LWS232 DB9-RJ45 4-wire adapter or LWS232 and USB-serial
adapter;
• CAT5 data cable;
• SOLAIR;
• MANIFOLD CONTROLLER and MANIFOLD (if the flow is read
through the MANIFOLD CONTROLLER);
• MODBUS software tool.
Procedure for Computer to Instrument only
WARNING:
There is
+24VDC on Pin 7 of the
RS-232/485 IN port.
1. Attach the LWS232 to the computer’s COM port. If a USB port is
to be used, attach the LWS232 to the USB-serial adapter, then to the
computer’s USB port.
Note:
Data obtained
from a SOLAIR directly
through MODBUS is real
time and has not been
stored on the SOLAIR.
Data format is “little-
endian” - refer to Appendix
B, MODBUS Register Map
v1.48 for more information.
2. Attach one end of the CAT5 data cable to the RJ45 connector of the
LWS232.
3. Attach the free end of the CAT5 data cable to the RS232/485 IN
port of the SOLAIR.
4. Apply power to the SOLAIR.
5. Press START in the MAIN screen of the SOLAIR.
6. Start the MODBUS software tool on the computer system.
7. For flow values, read registers 30067 and 30068 as Float32: