CTI 2572-A, Installation And Operation Manual

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CTI 2572-A Installation and Operation Guide V1.3 43
Word Transfer Command Block
The following command block writes 25 words obtained from local PLC V memory starting at V100
to the a block of V memory starting at V200 in the remote PLC.
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
7-15 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.
UDP Client Example
This example creates a UDP Socket with the address location bit set to allow the target IP address to
be set in the Word Transfer commands. The Write command block can then be used to write to
different modules.
Create Socket Command Block
This command block creates a UDP socket with a default IP address of 192.168.177.01 (hex
C0.A8.B1.01) and UDP port 1505. Note that the startup option bit 15 is set (Word 4 = 0x0002).
Offset Description Hex Decimal
0 Error Word 0000 0
1 Command Code (Create Socket) 0003 03
2 Connection Number (19221 - 19228) 4B15 19221
3 Protocol Manager Number 0024 36
4 Startup Option Bits 0002 2
5 Type of Service (1 = TCP, 2 = UDP) 0002 2
6 Remote Device - High 16 bits of IP Address C0A8 49320
7 Remote Device - Low 16 bits of IP Address B101 45313
8 Unused (Set to 0) 0000 0
9 TCP/UDP Port Number 05E1 1505
10-15 Unused (Set to 0) 0000 0