I set up the H1 ODC master channel: H1:ODC-MASTER_CHANNEL_OUT_DQ

The "H1 Interferometer Summary" bit (bit0) now includes the following bits:
Bit4:  PSL Summary (EPICS timing only)
Bit5:  IMC Summary
Bit 21:ADC overflow (for PSL, EPICS timing only)
Bit 22:DAC overflow (for PSL, EPICS timing only)
Bit 23:EXC on       (for PSL, EPICS timing only)
Bit 28:Guardian Observation Ready
Bit 29:Operator Science Mode Button

The guardian that will be serving bit 28 is not running yet.