AGS problem

That sure rings a bell with me. I'm sure I've been through it before. While I'm trying to recall the event and solution could you tell me that generator is being used? Was the AGS factory installed on the genset or was it an add on? Has the AGS worked previously and now it is acting up?

Just a thought as you are using port 0 for AGS. The Mate3s Programming Manual, page 26, AGS Set-up, Port "- — designates a port on a HUB communications manager. This port becomes the recipient of AGS commands.

A few thoughts:
- SOC drifts. I only use it as a visual reference point, never for logic in programming. For AGS I only ever used voltages and time.
- Speaking of SOC drift, the FNDC was designed for lead batteries. I would never rely on SOC programming controls for the AGS with lithium batteries using the FNDC. If you insist on using SOC for AGS you should consider using a Victron which has an adjustment for Puerkets that is needed for lithium batteries. Even then, I would still recommend voltage not SOC.
- If your programming calls for AGS when it should shut down the run the logic is reversed. The FNDC's AUX port is the only one that you can reverse the logic. I don't know what genset you are using but in my set up the genset autostart leads are closed to run, open to shut down. Since the Inv and CC output 12vdc when conditions are met I had to add a small automotive relay to trigger the AGS. If necessary its really easy to just change the NO to NC taps to reverse the logic. As mentioned, the Inverter has been the most reliable device for AUX control, like the genset.