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Shift direction
Coil
Forwards
FP
Reverse
BP
Memory
96 + per 4 Byte/Constant at function block input
Cycle time [μs]
easy800 standard
BIT
No entry
DW
No entry
Example: Shift register DW mode, backward
?
a
SR...DW
Shift Register
EN
1
RE
D1:
0
D2:
8
D3:
0
D4:
0
D5:
0
D6:
0
BP
D7:
0
>I2
10
D8:
0
Figure 183:Shift register SR..: Backwards operation in DW operating mode
a Initial situation:
– SR..EN is not activated, the function block is not active.
– SR..D2 contains the value 8, a 0 is contained in the other register fields.
b Transfer of value:
– SR..EN is activated, the function block is active.
– SR..I2 has the value 10.
– With the backwards pulse from SR..BP the register field SR..D8 shifts the content of all register fields
one place back and accepts the 10 from SR..I2.
c Transfer of value:
– SR..EN is activated, the function block is active.
– SR..I2 has the value 52.
– With the backwards pulse from SR..BP the register field SR..D8 shifts the content of all register fields
one place back and accepts the 52 from SR..I2.
d Reset of the register:
– SR..EN is activated, the function block is active.
– Activating SR..RE clears the content of the register.
Application example
Different workpieces are moved along a production line with several
machining stations. An operator determines the work required for the
individual workpieces, creates a production code for it and writes it into a
shift register.
Control Relay easy800 11/11 MN04902001Z-EN www.eaton.com
Control mode
BIT
FD
BD
easy800-SWD
16
28
b
SR...DW
Shift Register
Shift Register
EN
EN
1
RE
RE
D1:
8
D2:
0
D3:
0
D4:
0
D5:
0
D6:
0
BP
BP
D7:
0
>I2
52
>I2
D8:
10
0
5 Function blocks
5.30 SR, shift register
DW
I1
Relevant data
inputs
I2
c
d
SR...DW
SR...DW
Shift Register
EN
1
1
RE
D1:
0
D2:
0
D3:
0
D4:
0
D5:
0
D6:
0
BP
D7:
10
>I2
D8:
52
8
D1:
0
D2:
0
D3:
0
D4:
0
D5:
0
D6:
0
D7:
0
D8:
0
251
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