CTI 2572-A, Installation And Operation Manual

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CTI 2572-A Installation and Operation Guide
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Word Transfer Command Block
The following command block writes 25 words obtained from the local PLC V memory starting at
V100 to a block of V memory starting at V200 in the remote PLC. The target IP address and port is
specified in the command, allowing it to be changed to point to a different PLC in subsequent
execution.
Offset Description Hex Decimal
0 Error Word 0000 0
1 Command Code (Write) 0201 513
2 Connection Number (19221 - 19228) 4B15 19221
3 Source: Starting V Memory Address in this PLC 0064 100
4 Number of Words to Transfer (1-256) 0019 25
5 Destination: Starting V Memory Address in Remote PLC 00C8 200
6 Command Timeout in seconds
(0 = Use Default)
0000 0
7 - 9 Unused (Set to 0) 0000 0
10 IP Address of Remote Device - High 16 bits
(UDP Only: IP Address Location bit in the Create Socket
command must be set to 1)
C0A8 49320
11 IP Address of Remote Device - Low 16 bits
(UDP Only: IP Address Location bit in the Create Socket
command must be set to 1)
B103 45315
12 UDP Port Number of Remote Device
(UDP Only: IP Address Location bit must be set to 1)
05E1 1505
13 - 15 Unused (Set to 0) 0000 0
If you need to verify that the command was completed successfully, you can monitor the error status.
If a problem occurs while executing the command, the 2572-A will set the CMD ERR bit and place
the applicable error code in the Error Word. See
Appendix D for additional information.
Multicast Client Example
This example creates a Multicast Socket which can be used to send data to multiple PLCs
concurrently. The Unacknowledged Write command block is used to send the multicast data.
NOTE:
The 2572-A modules in the PLCs that will participate in the multicast session must be configured to
receive on the same multicast address as the client using to send data.