1079
Network Instructions Section 3-25
• Storing Data from the Rightmost Byte (Bits 12 to 15 of C = 8 hex)
Example: Storing the value 1234 hex in D+1
2. Data in 4-byte Units
• Storing Data from the Leftmost Byte (Bits 12 to 15 of C = 0 hex)
Example: Storing the value 12345678 hex in D+1 and D+2
• Storing Data from the Rightmost Byte (Bits 12 to 15 of C = 8 hex)
Example: Storing the value 12345678 hex in D+1 and D+2
Example In this example, EGATR(721) is used to read the general status of a DRT2
Slave (I/O Terminal).
When CIO 000000 and A20206 (the Communications Port Enabled Flag for
port 06) are ON, EGATR(721) reads the general status of the DRT2 Slave (I/O
Terminal). In this case, the Total ON Time or Number of Contact Operations
for input 3 are read.
Service Code = 0E hex, Class ID = 95 hex, Instance ID = 01 hex, and Attribute
ID = 65 hex.
The general status is returned in 1 byte.
34
15
123D+1 4
08 07
00
12
Frame
The data in the frame is in
the order 34 → 12.
In this case, 1234 hex is
stored from the rightmost
byte in the order 34 → 12.
78
15
785D+1
D+2
6
3412
08 07
00
56 34 12
Frame
The data in the frame is in the
order 78 → 56 → 34 → 12.
In this case, 12345678 hex is
stored from the leftmost byte in
the order 78 → 56 → 34 → 12.
78
15
567D+1
D+2
8
1234
08 07
00
56 34 12
Frame
In this case, 12345678 hex is
stored from the rightmost byte in
the order 78 → 56 → 34 → 12.
The data in the frame is in the
order 78 → 56 → 34 → 12.
000000
A20206
S
D
C
EGATR
D00000
D00100
D00200
Communications Port
Enabled Flag (Port 6)
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