Rockwell Automation 1771-QDC, D17716.5.93(Passport) PLASTIC MOLDING MODULE - Manual (Page 11)

Preface
P-4
Status Blocks
Status blocks report current status of molding-machine operation. They
are returned from the QDC module to the PLC-5 processor by means of
block transfer read (BTR) instructions in software ladder logic. Status
block abbreviations are:
Acronym: Description:
SYS System Status Block
CPS Clamp Close Profile Status Block
IPS Injection Profile Status Block
HPS Pack/Hold Profile Status Block
PPS Plastication Profile Status Block
OPS Clamp Open Profile Status Block
EPS Ejector Profile Status block
RLS Inject ERC Values Status Block
CLS Clamp and Eject ERC Values Status Block
Word and bit Numbering
The QDC module stores data in command and status blocks. Each word
location in a command or status block is identified by an alphanumeric
code containing the block acronym and word number. For example, word
09 of the Module Configuration Command Block (MCC) is identified as
MCC09.
Identify bits in a word location by adding bit numbering to the abbreviated
word location. For example:
Specific: MCC09-B15 General: MCCxx-Byy
where:
MCC = Module Configuration Command Block
xx=word number (01-64)
B = bit identifier
yy = bit number (00-15)