Rockwell Automation 1771-QDC, D17716.5.85(Passport) MNL. PLASTIC MOLDING MODULE - Manual (Page 50)

Overview of Remaining
Configuration Procedures
Chapter 4
4-2
There are two types of command blocks. They are presented in the
following table.
Type Which Contain Examples
Configuration Blocks Information necessary to configure your
module to run a certain portion of a profile
Valve spanning
information for the
injection profile
Profile Blocks Actual process setpoints necessary to
produce a desired part.
Plastication profile
operating setpoints
Status Blocks
The QDC module returns critical operating status and values to the PLC-5
data table through status blocks. Like configuration blocks, status blocks
are areas of PLC-5 data table. Status blocks, however, contain actual
machine operation information rather than machine setpoints and action
commands.
Type Which Contain Examples
Status Blocks Information about machine operation and
operating status of the QDC module.
The molding machine is
currently performing a
preĆdecompression
movement.
A few special command and status blocks are the Module Configuration
Block, Dynamic Command Block, and the System Status Block.
Types Description Examples
Module Configuration
Block (MCC)
Contains configuration information used
throughout all phases of machine
operation
Sensor spanning information
and global alarm setpoints
Dynamic Command
Block (DYC)
Includes all commands necessary to jog,
run, and stop any applicable machine
phase or operation.
Command to start the
Plastication phase
System Status Block
(SYS)
Returns to the PLC processor information
relevant to common module parameters.
Actual voltages and
engineering units read back
at the four QDC inputs
Special Command and
Status Blocks