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CTI 2572 Installation and Operation Guide
39
Offset 3 Write Source: Starting V Memory - Enter the first V memory location in the local
PLC which contains the values which you wish to write to the remote PLC.
Offset 4 Number of Words to Write - Enter the number of words you want to write.
Offset 5 Write Destination: Starting V Memory - Enter the beginning address of the V
memory block in the remote PLC to which you want to write this data.
Offset 6 Command Timeout in seconds - When set to 0, the default value of approximately 9
seconds is selected. A value of 999 specifies an infinite timeout.
Offset 7 Source: Starting V Memory - Enter the first V memory location in the remote PLC
from which you wish to read data.
Offset 8 Number of Words to Read - Enter the number of words you want to read.
Offset 9 Destination: Starting V Memory - Enter the beginning address of the V memory
block in the local PLC to which you want to write this data.
NOTE:
The memory exchange command must contain at least one word to write or an error will be returned.
The maximum number of words which can be written with a single command is 254. The maximum
number of words that can be read is 256.
Offset 10-11 IP Address - UDP Only, firmware Version 5.0 and greater. If you set the IP
Address Location bit to 1 (see offset 4 of the C
REATE SOCKET command block), you
must specify the IP address of the remote device. Since the IP address consists of 32
bits, the address is contained in two 16 bit words. An IP Address of 0.0.0.0 (0000
0000 hex) or greater than 223.255.255.255 (DFFF FFFF hex) will return an error. If
the IP Address Location bit is set to 0, these words are ignored and the IP address
contained in the C
REATE SOCKET command block is used.
Offset 12 UDP port number - UDP Only, firmware Version 5.0 and greater. If you set the IP
Address Location bit to 1 (see offset 4 of the C
REATE SOCKET command block), you
must specify the UDP port number of the remote device. If you are accessing another
2572, you will typically set this value to 1505 (the recommended value for the 2572
PLC server). If the IP Address Location bit is set to 0, these words are ignored and
the port number contained in the C
REATE SOCKET command block is used.
Offset 13-15 Unused - Set to 0.