LRWMANUAL 0321
KAM CONTROLS, INC.
35
ENABLE/DISABLE MODBUS
Unless requested, Modbus is usually disabled prior to shipment from KAM. Before proceeding, install and configure
RealTerm as per instructions on pages 19–21 of this manual. Ensure your PC is connected to the LRW sensor via the
supplied RS232 serial cable and USB-to-serial converter as per wiring diagram on page 12. To access the boards,
unscrew the cover from the Explosion Proof electronics enclosure, unscrew the LCD Display plate and carefully
unplug the LCD connector.
1.
Launch RealTerm. Go to the "Send" tab, type "?modbus" on either command box and click on "Send ASCII" to
check Modbus status. The Modbus parameters will display on the RealTerm window. FIG. 4-23.
FIG. 4-23
2.
Type the command "!modbus" and click on "Send ASCII" to enable Modbus. Modbus status will change to
"Enabled" confirming the change. FIG. 4-24.
FIG. 4-24
3.
Power cycle (turn off and on) the LRW to start the Modbus communication.
4.
To disable Modbus, use the same command "!modbus" and click on "Send ASCII." Modbus status will change to
"Disabled" confirming the change.
K A M L R W O P E R AT I O N R E A LT E R M C O N T I N U E D