PowerLogic T500 – TI=46 Double Command rejected; DO works only via web Force

[OdysseiaTiTi]

Hi all,

I’m running an PowerLogic T500 (HU280 + DI180 + DO180) with Easergy Builder v1.7.49 as an IEC-104 slave (ASDU addr = 1, port 2404).

What works

• Telemetry is fine: analogs and double-point DIs come through over 104.

• From the web UI, Force DO works — relays click, so hardware is OK.

The issue

• From an IEC-104 tester, sending TI=46 (C_DC_NA_1 / Double Command) does not operate the DOs.

• In the trace I see COT=6 (activation) followed by “7: negative activation confirmation” (no termination). The relay doesn’t move.

What I’ve tried

• 104 Enable = ON.

• CMD use act term = ON, CSE use act term = ON.

• In Control Points, C_DC is enabled; tried both Direct Execute and Select→Execute (SBO).

• In coreDB → Command, IOAs 160–167: CDC are mapped to DO180 channels (Latch = N, ExeTim = 500 ms).

Question

• Is there any T500-specific setting or trick required to make TI=46 Double Command drive the DOs?

• If the T500 expects particular QOC/QU/Select bit combinations, could you share a working example frame?

• Also, is there a global Secure / Block controls option that might be rejecting C_DC commands?

Thanks a lot! 🙏