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4-4
Section
DM Area Allocations
56
4-4
DM Area Allocations
The various kinds of data are stored in the offset positions shown in the following
diagram, from the beginning word in the area for each Unit.
The beginning word m is calculated by the following equation:
Beginning word m = (100 x unit number)
Offset
Bit
Data direction
Related communications services
CPU Unit to Ethernet Unit
Ethernet Unit to CPU Unit
CPU Unit to Ethernet Unit
m
m+1
m+2
m+3
m+4
m+5
m+6
m+7
m+8
m+9
m+16
m+17
m+18
m+28
m+88
m+98
m+99
15
8
7
0
Internode test remote network address and node number
Internode test number of send bytes
Internode test response monitoring time
Internode test status
Number of internode test runs
Number of internode test timeout errors
Number of internode test response errors
Number of internode test send errors
Number of times internode test data did not match
TCP socket No. 1 connection status
TCP socket No. 8 connection status
Mail status
Socket Services Parameter Area 1
Socket Services Parameter Area 2
Socket Services Parameter Area 8
IP Address Display Area
Mail function
(Refer to Section 8 Mail.)
Internode Test Function
(Refer to 9-3 Internode Test.)
Socket Services
(Refer to Section 6
Socket Services.)
Socket Services
(Refer to Section 6
Socket Services.)
Ethernet Unit to CPU Unit
The meanings of the items shown in the above diagram are explained on the
following pages. For details regarding the related communications services
shown in the diagram, refer to the indicated sections.
Internode Test Remote Network Address and Node Number (CPU Unit to Ethernet Unit)
Remote network address
Remote node number
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
m
Specify the remote network address and node number in hexadecimal within the
following ranges:
Remote network address: 00 to 7F Hex (0 to 127 decimal)
Remote node number: 01 to 7E Hex (0 to 126 decimal)
If a remote network address is set to 00, it will specify the local network (i.e., the
network to which the Ethernet Unit is connected.)
Internode Test Number of Send Bytes (CPU Unit to Ethernet Unit)
Number of send bytes (0000 to 07CC Hex)
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
m+1
Specify, in hexadecimal, the number of bytes of test data to be sent between
nodes.
0000 (Hex): 1,996 bytes
0001 to 07CC (Hex): 1 to 1,996 bytes