The Tally light on the CM70-series (including the NDI camera) is part of the optional license LC70-1 that also includes the Customizable Color Matrix CCM and SRT streaming. Without a license, the LED on the front is not controllable.
On the 4K CM93 cameras the tally light functionality is a standard feature.
There are no status inquiry commands for the Tally light function, but RED, GREEN, OFF commands over VISCA (either IP or serial):
| Command | Function | Command Packet | Comments |
CAM_TallyLight (Cm7x only with license active) | Red | 81 01 7E 01 0A 00 02 03 FF | Tally Light Red ON |
| Green | 81 01 7E 01 0A 00 03 02 FF | Tally Light Green ON | |
| Off | 81 01 7E 01 0A 00 03 03 FF | Tally Light OFF |
* Usually the Tally light is controlled via the video switcher.
* If using a CM70-NDI, don't forget to tick the box "Tally Light Enable":
