A new TwinCAT code for the corner h1ecatc1 was loaded. It includes the following fixes and features:

1. Fixed the communication between PLC1/2 and 4. This includes adding the new frequency counters for the squeezer VCO, beat note and VCXO, as well as the whitening that is controlled by PLC2. The communication structures needed to be "rewired" in the system manager.
2. The demodulator channels were hooked up backwards. Two of the demod chassis do not have a power ok readback, and this was fixed.
3. The order of PZTs was not identical between the wiring diagram and the TwinCAT configuration. Furthermore, the second OPO PZT is no longer driven and has been replaced by the seed PZT.
4. The whitening channels assignment for individual PDs was fixed and the whitening eliminated for 2 PDs that have none.
5. The TTFSS v4 uses the same PFD/demod boards as the ISC demodulators. The software now reflects this and uses the same demod interface for this sub part.
6. The ALS laser autolocker has been abstracted, so it can work for the squeezer laser as well. The hardware configurations are nearly identical with the main difference that the ALS uses a common mode board for the locking servo, whereas the squeezer laser uses a TTFSS. The fiber delivery, photodetector monitoring, RF and frequency readbacks are all the same. In principle, the line searching and locking should be able to follow the same steps, using the same medm screens and procedures.
7. The startup delay for the EPICS interface has been increase by 2 seconds to make sure that the loading of the TwinCAT kernel driver completes beforehand.
8. The RF power readbacks for the AOM drivers needed to be adjusted for the different ratio of the RF coupler (–30dB instead of –20dB).

Pending: Timing comparator code update for implementing ECR E1700246.