Ethernet Communications Modules, 3rd Edition, Rev. D
4–21
Chapter 4: RLL Programming for Communications
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A
B
C
D
First RX/WX Instruction
Second RX/WX Instruction
Third RX/WX Instruction
C60 is the interlocking contact. It is
turned on by the Store If Equal rung
preceding this one.
C61 is the interlocking contact. It is
turned on by the sequencing steps of
the Shift Register in a preceding rung.
C62 is the interlocking contact. It is
turned on by the sequencing steps
of the Shift Register in a preceding
rung.
LD
K114
LD
K2
LDA
O40600
WX
VC100
SP122
C60
LD
K109
LD
K2
LDA
O40601
WX
VC0
SP122
C61
LD
K114
LD
K2
LDA
O40602
RX
VC20
SP122
C62
After this rung is executed, the Shift Register shifts the high bit from C62 to C63 on the next
CPU scan. C63 resets the Shift Register to zeros, the Store If Equal sets the C60 bit, and the
CPU executes the first RX/WX instruction.
Содержание H0-ECOM
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