Writing applications in GCL

The O3 Edge uses the GCL+ programming language to provide local application logic which executes directly in the device. The O3 Sense does not support GCL+, but may be controlled remotely through BACnet by another device.

Use Program (PG) objects to develop, validate, download, and debug GCL+ programs. You can create up to five PG objects, PG1–PG5, in one device.

Note: PG limits may vary depending on your firmware version. Refer to the release notes for more information. 

You can also copy PG objects between various V4 devices. For more information about using GCL+, see help.deltacontrols.com

You need enteliWEB 4.20, or enteliWEB 4.19 with the patch to use GCL+.

If you don't have enteliWEB or enteliCLOUD, you can contact Delta Professional Development Services to develop your GCL+.

You can write GCL+ code directly into the device to write application control logic, such as controlling the local I/O, reading values from other devices, writing values to other devices, etc.

Additionally, you can use existing code available in other Delta products to write GCL+ code.

GCL+ does not replace Node-RED; Node-RED can still be used for IoT integrations. Contact Delta Professional Development Services to create your Node-RED flows. Node-RED support may vary depending on your firmware version. If you are using firmware version 4.16 or later, Python DLM can be used as a programming alternative.