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FPΣ User's Manual
ST Body
Buffer statuses
The following shows the statuses of the send and receive buffers when the sample program is
run.
Status of the send buffer before sending:
When the program is executed, the following read command is sent to the remote FP series
PLC: "%01RDD00000 00001**".
Offset
0
19
1
16#30
(0)
16#25
2
16#23
(#)
16#31
3
16#44
(D)
16#52
4
16#30
(0)
16#44
5
16#30
(0)
16#30
6
16#30
(0)
16#30
7
16#30
(0)
16#30
8
16#30
(0)
16#30
9
16#2A
(*)
16#31
10
16#2A(*)
At the end of transmission, the value in offset 0 is automatically reset to 0.
Status of the receive buffer when the reception is completed:
The remote FP series PLC returns the values 100 in DT0 and 200 in DT1 with the following
response: "%01$RD6400C8006F
The number of bytes received is stored in offset 0. The received data is stored in order from
the low-order byte.
(%)
(1)
(R)
(D)
(0)
(0)
(0)
(0)
(1)
C
".
R
8.6 Program Controlled Communication
217
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