CFHT Logo   Autofill Stuff


   
  • Autofill PLC - 83.70 (Link to PLC Code) (You may enter the PLC's IP address into a web browser and monitor the various data registers).
    • Auto Fill Status - Web Page Status
    • Temperatures (Degrees C):
      • F20:0 - Flow Temp 1
      • F20:1 - Flow Temp 2
      • F20:2  - Exhaust  Temp
      • F20:9 - Dewar Temp
    • Vacuum Data
      • F23:0 - Vacuum Value (Torr)
      • F23:1 - Max Vacuum Value Threshold. (Used to determine if filling is OK)
      • F23:2 - Max vacuum gauge volts. (Determine if vacuum gauge volts is valid)
        • Value (volts) = (F23:2*10)/32767
      • F23:3 - Min vacuum gauge volts. (Determine if vacuum gauge volts is valid)
        • Value (volts) = (F23:3*10)/32767
    • Command Register
      • N10:0 - Fill Mode
        • 0 - Off/Cancel
        • 1 - Manual Fill
        • 2 - Auto Fill
        • 3 - Schedule (Interval) Filll
      • N10:1 - 1 - 4 Intervals per 24 hours
    • B22:0 - Status Register
15
 14
 13
 12
 11
 10
 9
 8
 7
 6
 5
 4
 3
 2
 1
 0
Pressure
Relief 2
Error
 Pressure
Relief 1
Error
 No LN2 Flow
 Both Dewars Empty
 Dewar 2 Empty
 Dewar 1 Empty
 Ambient Temp
Error
 Exhaust
Temp
Error
 Flow 2 Temp
Error
 Flow 1 Temp Error
 Amb RTD Error
 Exhaust RTD Error
 Flow 2 RTD
Error
 Flow 1 RTD Error
 Vac Too  High
 Vac Gauge Volts Error
    • B22:1 - Some Status
15
 14
 13
 12
 11
 10
 9
 8
 7
 6
 5
 4
 3
 2
 1
 0
Software
Reset
 No Vacuum
Gauge Enable (Set  for no Vac Gauge)
 Auto Time Control
0 - User defined  fill times.
(N50:10, N50:21, N50:22, N50:23)
Based on # Cycles
(N10:1)

1 -Equal time intervals.
(6, 8, 12, 24 hours)
Based on # Cycles (N10:1)

 Auto Fill Mode
0 - Trigger on Exhaust Tmp (F20:15)
1 - Trigger on Dewar Temp (F20:16








Dewar 2
Valid
 Dewar 1 Valid
 Dewar 0 Valid
(No Valid Dewars)
    • Date Stuff
      • N50:10 holds the integer value for "Hour" of start time.  This is in 24 hour format.
      • N50:11 holds the integer value for "Minute" of start time. 
      • N50:12 holds the integer value for "Seconds" of start time but I don't actually use this.  It's just there.
      • N50:13 holds the integer value for  Last Fill "Hours"
      • N50:14 holds the integer value for Last Fill "Minutes"
      • N50:15 holds the integer value for Last Fill "Seconds"
  • Cables:
  • Auto Fill Cabling: - Cables connecting to Auto Fill PLC.
    Cable and wiring between PLC and Control Box.
    		  
    Controller Box (DB 25 Connector) Wire Color Signal Description Allen Bradley Module Module
    Bit#
    1 red +5 Volts DC    
    2 blu Off/Cancel Select Switch I:4 12
    3 orn Manual Select Switch I:4 13
    4 vio Scheduled Fill Select Switch I:4 14
    5 yel Auto Fill Select Switch I:4 15
    6 brn New Dewar Select Switch I:4 10
    7 gry #Cycles Select Switch I:4 11
    8 vio Data A Input - LED Display O:5 0
    9 vio/wht Data B Input - LED Display O:5 1
    10 yel Data C Input - LED Display O:5 2
    11 yel/wht Data D Input - LED Display O:5 3
    12 vio Vacuum Too High LED O:5 4
    13 yel No LN2 Flow LED O:5 5
    14 grn Dewar 1 Empty LED O:5 6
    15 blu Dewar 2 Empty LED O:5 7
    16 gry Pressure Relief 1 LED O:5 8
    17 orn Pressure Relief 2 LED O:5 9
    18 blu/wht Off/Cancel LED O:5 12
    19 orn/wht Manual LED O:5 13
    20 vio/wht Scheduled Fill LED O:5 14
    21 yel/wht Auto Fill LED O:5 15
    22 gry/wht # Cycles Select LED O:5 11
    23        
    24        
    25 blk Signal Ground    
  • Auto Fill Cabling: - Cables connecting to Auto Fill PLC.
    Cable and wiring between PLC and Temps sensors
    Temps
    DB15 Connector Pin
    		 DB9 Connector
    at Temp Sensor
    		 Wire Color Signal Description Allen Bradley Module Module Pin#
    1 1 red Flow Temp1 I:2.0 RTD0
    2 2 wht Flow Temp1 I:2.0 Sense0
    3 3 blk Flow Temp1 I:2.0 Return0
    6 1 red Flow Temp2 I:2.1 RTD1
    7 2 wht Flow Temp2 I:2.1 Sense1
    8 3 blk Flow Temp2 I:2.1 Return1
    9 1 red Exhaust Temp I:2.2 RTD2
    10 2 wht Exhaust Temp I:2.2 Sense2
    11 3 blk Exhaust Temp I:2.2 Return2
    13 1 red Ambient Temp I:2.3 RTD3
    14 2 wht Ambient Temp I:2.3 Sense3
    15 3 blk Ambient Temp I:2.3 Return3
               
    1 1 red Dewar Temp I:7.0 RTD0
    2 2 red Dewar Temp I:7.0 Sense0
    3 3 wht Dewar Temp I:7.0 Return0

  • Auto Fill Cabling: - Cables connecting to Auto Fill PLC.
    Cable and wiring between PLC and Vacuum Gauge
    Vacuum
    DB9S Connector Pin    		 Signal Description Allen Bradley Module Module Pin#
    3 Vacuum Gauge 24 V DC Power
    		    
    4 Vacuum Gauge Power Ground    
    5 Vacuum Gauge Analog out I:1.0 0
    8 Vacuum Gauge Analog out ground I:1.0 1