Rockwell Automation 1771-QDC PLASTIC MOLD.MODULE - Manual (Page 177)

Chapter
3
Publication 1771-6.5.88 – July 1997
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Status Word/Bit Descriptions
Status blocks report current status of molding machine operation.
Status blocks are returned from the QDC module to the PLC
processor by means of block transfer read (BTR) instructions in
software ladder logic.
Acronym:
Block ID
Binary: Decimal:
Description: Page:
CLS 00001001 27 Clamp and Eject ERC Values Status Block 3-5
CPS 00000010 7 Clamp Close Profile Status Block 3-6
EPS 00000111 24 Ejector Profile Status Block 3-9
HPS 00000100 12 Pack/Hold Profile Status Block 3-11
IPS 00000011 9 Injection Profile Status Block 3-14
OPS 00000110 21 Clamp Open Profile Status Block 3-17
PPS 00000101 15 Plastication Profile Status Block 3-20
PTS 00001010 28 Process Trace Status Block 3-22
RLS 00001000 26 Inject ERC Values Status Block 3-24
SYS 00000001 1 System Status Block 3-25
The listings of status blocks use five types of data words:
•
Block ID
•
Bit-mapped
•
Stored-value
•
Open
•
Reserved
Block ID Word
The first word in each status block contains a binary number code in
the low byte that identifies the block. The PLC processor uses them
to identify status blocks received from the QDC module.
For all status block ID words, the high byte is identical to the high
byte of the system status word SYS01, and contains jog-execution
and power start-up status.
Bit-mapped Words
The first several words in any data block are bit-mapped. As the
QDC module monitors and detects changes in events of machine
cycles, it sets/resets or latches/unlatches status bits to inform the
PLC-5 processor that these events have occurred.
List of Status Blocks and
Block ID Codes
List of Data Words