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4--6--2
Reading
VAL
BUSY
DSL
1 to 6
RD
1 to 4
1) (A)I, (A)II, (A)III, (A)IV
2) (B)
3) (C)I, (C)II, (C)III, (C)IV
4--7
E5AF-A20: Application Example #1
4--7--1
I/O Configuration
DSL1 set
(0)
0
10
read
DSL2 set
DSL3 set
(1)
(2)
(3)
(A)I
(A)II
(B)
(C)I
(C)II
DSL
DSL
I
II
(D)I
(D)II
RD
I
30 to 50 ms
MIN. 30 ms
MAX. 80 ms
Note If the scanning speed of the PC is too slow to read the low level BUSY signal
(part (A) of the above timing chart), change the DSL setting as follows:
(D)I > (C)I, or, (D)II > (C)II, (D)III > (C)III
The following example describes the I/O configuration and programming re-
quired to send set values and process values between the E5AF-A20 and
the C1000H SYSMAC C-series PC.
The following illustration and table show the system configuration and I/O
allocations used in this example. Signal direction designations are from the
view of the E5AF; I/O allocations and PC Unit designations are from the view
of the PC.
Output Units
IR002
IR 003
IR 004
Display
E5AF
1
2
10
read
10
read
DSL4 set
(4)
(5)
(6)
(A)III
(A)IV
(B)
(B)
(C)III
(C)IV
DSL
DSL
III
IV
(D)III
RD
RD
II
III
DSL: Data select
code
RD: Read data
Input Units
IR 000
IR 001
C1000H SYSMAC
C-series PC
Control
inputs
Thumbwheel
switches
Section 4--7
20 ms min.
3
10
read
(8)
RD
IV
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