203
Work Bits (Internal Relays)
Section 4-5
mine output conditions for IR 10000, IR 10001, and IR 10002, i.e., to turn the
outputs allocated to these bits ON or OFF.
Differentiated Conditions
Work bits can also be used if differential treatment is necessary for some, but
not all, of the conditions required for execution of an instruction. In this exam-
ple, IR 10000 must be left ON continuously as long as IR 001001 is ON and
both IR 00002 and IR 00003 are OFF, or as long as IR 00004 is ON and IR
00005 is OFF. It must be turned ON for only one cycle each time IR 00000
turns ON (unless one of the preceding conditions is keeping it ON continu-
ously).
This action is easily programmed by using IR 22500 as a work bit as the oper-
and of the DIFFERENTIATE UP instruction (DIFU(13)). When IR 00000 turns
ON, IR 22500 will be turned ON for one cycle and then be turned OFF the
next cycle by DIFU(13). Assuming the other conditions controlling IR 10000
are not keeping it ON, the work bit IR 22500 will turn IR 10000 ON for one
cycle only.
00000
00003
00001
00004
00002
00005
00004
00007
00006
00005
21600
21600
21600
21600
10000
10001
10002
Address Instruction
Operands
00000
LD
00000
00001
AND NOT
00001
00002
OR
00002
00003
OR NOT
00003
00004
OUT
21600
00005
LD
21600
00006
AND
00004
00007
AND NOT
00005
00008
OUT
10000
00009
LD
21600
00010
OR NOT
00004
00011
AND
00005
00012
OUT
10001
00013
LD NOT
21600
00014
OR
00006
00015
OR
00007
00016
OUT
10002
•
22500
DIFU(13) 22500
00000
00001
00002
00003
00004
00005
10000
Address Instruction
Operands
00000
LD
00000
00001
DIFU(13)
22500
00002
LD
22500
00003
LD
00001
00004
AND NOT
00002
00005
AND NOT
00003
00006
OR LD
---
00007
LD
00004
00008
AND NOT
00005
00009
OR LD
---
00010
OUT
10000
Содержание SYSMAC CQM1H Series
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