Rockwell Automation 1771-QI,D17716.5.126 PLASTIC MOLD.MODULE - Manual (Page 77)

Chapter
3
Publication 1771-6.5.126 – March 1998
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Status Word/Bit Descriptions
Status blocks report current status of molding machine operation.
They are returned from the QI module to the PLC processor by means
of block transfer read (BTR) instructions in software ladder logic.
Acronym:
Block ID
Binary: Decimal:
Description: Page:
HPS 00000100 12 Pack/Hold Profile Status Block 3-3
IPS 00000011 9 Injection Profile Status Block 3-5
PPS 00000101 15 Plastication Profile Status Block 3-8
PTS 00001010 28 Process Trace Status Block 3-11
RLS 00001000 26 Inject ERC Values Status Block 3-13
SYS 00000001 1 System Status Block 3-14
The listings of status blocks use five types of data words:
•
Block ID
•
Bit-mapped
•
Stored-value
•
Reserved (RFU)
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 QI 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 QI
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.
Stored-value Words
The QI module reports actual values of machine operation obtained
from sensor devices that you connect to its input terminals. The values
are transferred to the PLC processor for data processing and alarm
purposes. These values include positions, pressures, and velocities.
Reserved Words (RFU)
These words are Reserved for Future Use. Do not use them.
List of Status Blocks and
Block ID Codes
List of Data Words