# sinqSPS

A collection of standardised SPS databases (or "modules") for interacting with
the control unit itself and other external hardware.

This makes use of the
[s7plcFW Epics driver](https://gitea.psi.ch/lin-epics-modules/sinqS7plcFW) for
communication with the Siemens 7th Generation PLC via the Fetch-Write Protocol.

# Shutter Module

This script allows the shutter at the instrument to be opened and closed as
well as providing access to many status bits and messages.

```
epicsEnvSet("INSTR", "SQ:INSTRUMENT:") # can also be set in runScript call

runScript("$(sinqSPS_DIR)shutter.cmd","SPS_IP=172.28.101.26,FETCH_DB=210")
```

The directly exposed database fields can be found in
[shutter.substitutions](./templates/shutter.substitutions).

A simplified status value and status message is created from these fields via
the logic in [shutter.db](./db/shutter.db).

The corresponding nicos device is located at
[nicos\_sinq/devices/epics/shutter.py](https://gitea.psi.ch/lin-instrument-computers/Nicos/src/branch/release-3.12/nicos_sinq/devices/epics/shutter.py).