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GFK-1541B Chapter 3 Programming Channel Commands 3-27
3
(Words 7–17):
See the descriptions in Example 1.
(Word 18) Remote Host - Network Address Type:
Word 18 specifies the format of the remote
host’s address. Currently, Word 18 must contain the value 1 or 3. A value of 1 indicates a
dotted-decimal IP address expressed using a separate register for each decimal digit. A value of 3
indicates a Network Address name. See Example 1 for information on using address type 1.
(Word 19) Remote Host - Network Address Length:
Word 19 specifies the length in words of
the remote host’s Network Address name. With an address type of 3 specified in Word 18, Word
19 must contain 32 decimal.
(Words 20–35) Remote Host - Network Address Name:
Words 20–35 specify the Network
Address name of the remote host as an ASCII character string. The Network Address name may
contain up to 31 characters, is case sensitive, and must be terminated with a null character (zero).
An error will result if the Network Address name is empty or if the name could not be resolved
into the address of an actual device.
The Network Address name must have each pair of ASCII characters reversed within the PLC
memory. For example, the name “PLC_1aa” (“P” = 50H, “L” = 4CH, “C” = 43H, “_” = 5FH,
“1” = 31H, “a” = 61H, “a” = 61H ) would have 4C50H in Word 20, 5F43H in Word 21, 6131H in
Word 22, and 0061H in Word 23. Words 24–35 all contain 0000H.
Note
The Network Address name of the remote host must be defined in the Name
Table in this Ethernet Interface or be defined at a reachable DNS Name Server.
See the chapter: “Network Administration Support”, for more information.
(Words 36–51):
Reserved, set to 0.