INFICON SQC-222 Thin Film Deposition Controller - Manual (Page 65)

Chapter 3 Menus
3-27
For those developing their own PLC program, the SQC-222 updates/reads the internal
PLC registers with the events shown below. .
PLC Register SQC-222 Function
200 Layer/Phase Register
Bits 0-9 are BCD layer number running
Bits 10-15 are BCD Phase# as shown below
00 Not Used
09 ShutterDelay Phase
01 Not Used 10 Deposit Phase
02 Not Used 11 Layer Stopped
03 Not Used 12 Layer Starting
04 Process Stopped 13 Not Used
05 Precondition Phase 14 Feed Ramp Phase
06 Not Used 15 Feed Hold Phase
07 Not Used 16 Idle Ramp Phase
08 Not Used 17 Idle Phase
201 Sensors/Outputs 1-4 Register (updated each layer)
Bits 0-3 are sensors used (1=used, 0=unused)
Bits 12-15 are outputs used, 12 is Out1, 13 is Out2, etc.
220 Source Index Register (updated each layer)
Bits 0-3 are BCD of Output 1 source index
Bits 4-7 are BCD of Output 2 source index
Bits 8-11 are BCD of Output 3 source index
Bits 12-15 are BCD of Output 4 source index
221 Source Indexer Done Flag
Bit 0 is Source Indexer 1 (1= Indexer Done, 0=Not Done)
Bit 1 is Source Indexer 2
Bit 2 is Source Indexer 3
Bit 3 is Source Indexer 4
222 Relays 1-16
Bit 0 is Relay 1, etc.
224 Inputs 1-12
Bit 0 is Input 1, etc.