Allen-Bradley 1771-QDC, Руководство пользователя, Страница: 67 / 197

Select Command and Status Bits
To Sequence Machine Operation
Chapter 6
6-3
Table 6.C
Status and Command Bit Interaction for Automatic Functions
For this
Profile/Movement
During execution
this bit in B34 is
At completion
this bit in B34 is
At completion, if this
command bit is This status bit is
SET RESET SET RESET also SET also SET
Injection SYS21B04 SYS02B04 SYS02B04 SYS21B04 --- ---
Pack SYS21B05 SYS02B05 SYS02B05 SYS21B05 --- ---
Hold SYS21B06 SYS02B06 SYS02B06 SYS21B06 HPC03B08 SYS22B06
Predecompression SYS21B07 SYS02B07 SYS02B07 SYS21B07 HPC03B09 SYS22B07
Plastication SYS21B08 SYS02B08 SYS02B08 SYS21B08 PPC03B08 SYS22B08
Postdecompression SYS21B09 SYS02B09 SYS02B09 SYS21B09 --- SYS22B09
Table 6.D
Command Bits To Interrupt Ram (screw) Movement Between Profiles
Bit Description QDC Block Address
0 = start predecompression movement @ end of hold profile
1 = stop and set output @ end of hold profile
HPC03B08
0 = start plastication profile @ end of predecompression movement
1 = stop and set output @ end of predecompression movement
HPC03B09
0 = start postdecompression movement @ end of plastication profile
1 = stop and set output @ end of plastication profile
PPC03B08
Table 6.E
Miscellaneous Status Bits To Trigger New Events in Inject Mode
Reason for Using Bit Description QDC Block Address
To drop pump adders, or shift solenoids before
starting pack/hold profile
Injection complete SYS02B04
To inhibit clamp from opening in auto mode Cure timer timing SYS03B03
To start clampopen phase Ram (screw) retracted, and
Cure time complete
SYS03B04, and
SYS03B05
To idle the machine and activate an alarm
because the hopper is running out of plastic
Watchdog for plastication phase SYS04B08
To shift solenoids for predecompression Setoutput in progress @ end of hold SYS22B06
To shift solenoids for plastication Setoutput in progress @ end of predecompression SYS22B07
To shift solenoids for postdecompression Setoutput in progress @ end of plastication SYS22B08
To idle the machine until starting next action Setoutput in progress @ end of
postdecompression
SYS22B09