Some more EPICS

epicsIOC/db/positionGauge.db

@@ -7,7 +7,12 @@ record (ai, "$(SYSDEV):POS")
     field(DESC, "Gauge position")
     field(DTYP, "stream")
     field( INP, "@positionGauge.proto read_pos $(PORT)")
+    field(PREC, ".001") #display precision
     field( EGU, "mm")
+#TODO: This one is the value, and :UNIT is the unit.
+#      If unit is XX, then the value may be stale
+#      (indicates an unsuccessful instrument read)
+#    field(EGU , $(SYSDEV):UNIT)
     field(SCAN, "I/O Intr")
 }
 record (stringin, "$(SYSDEV):UNIT")