Delta Network Sensor: BACstat I DNS-14 (Rev 1.6) Installation Guide
Page 10 of 12
Document Edition 1.9
GCL Programming
All GCL programming for BACstats on a LINKnet network is written in the Application Controller
that the BACstats are connected to, using the mapped objects resident in the Application Controller.
The LCD object is used for display and button handling. The mapped AI1 object is used for reading
the temperature value. And with at least V3.22 firmware on the Application Controller, the mapped
AV objects are used for setpoints and various other settings.
Note:
Always use the LCD object for processing button presses over a LINKnet connection,
rather than AV4.
W
ITH
V3.21 F
IRMWARE
: When connected to LINKnet local display and button handling should be
disabled (i.e., AV15 = 1.0), which is the default when you set the LINKnet Communications Setting
to O
N
. This way, the LCD and buttons are fully accessible from the Application Controller for
custom programming. Then, with GCL and the LCD and AI objects resident up in the Application
Controller, you program the BACstat to operate as you want (similar to how ISTATs were
programmed) – all BACstat functionality is written in GCL located in the Application Controller.
Note that none of the AV objects are accessible with V3.21 firmware.
W
ITH
V3.22 F
IRMWARE OR
H
IGHER
: You may disable local display and button handling (i.e.,
AV15 = 1.0) and program everything in GCL in the Application Controller as previously described
for V3.21 firmware. Or, by setting the Display Code to something other than 1.0 (i.e., 4.0, which is
a typical setting), the display and buttons may be configured to function locally and GCL commands
from the Application Controller for display and button handling (via the LCD object) are
ignored
.
This may be the preferred method as no GCL needs to be written to handle setpoint adjust and the
display of values on the LCD. In addition to this, setpoints and other settings are also accessible
through their corresponding AV objects.
Refer to Appendix G in the V3.22
ORCAview Technical Reference Manual
for further programming
information.
