Chapter 3 menus – INFICON SQC-222 Thin Film Deposition Controller User 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.
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