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COMMREQ Status Word: The Ethernet Interface updates the CRS word to show success or failure of the command. Command words 3 and 4 specify the PLC memory location of the CRS word.
(Word 3) COMMREQ Status Word Pointer Memory Type: This word specifies the memory type for the CRS word. The memory types are listed in the table below.
Type | Value | Value | Description |
| (Decimal) | (Hex.) |
|
%R | 8 | 08h | Register memory (word mode) |
%AI | 10 | 0Ah | Analog input memory (word mode) |
%AQ | 12 | 0Ch | Analog output memory (word mode) |
%I | 16 | 10h | Discrete input memory (byte mode) |
| 70 | 46h | Discrete input memory (bit mode) |
%Q | 18 | 12h | Discrete output memory (byte mode) |
| 72 | 48h | Discrete output memory (bit mode) |
%T | 20 | 14h | Discrete temporary memory (byte mode) |
| 74 | 4Ah | Discrete temporary memory (bit mode) |
%M | 22 | 16h | Discrete momentary internal memory (byte mode) |
| 76 | 4Ch | Discrete momentary internal memory (bit mode) |
%G | 56 | 38h | Discrete global data table (byte mode) |
| 86 | 56h | Discrete global data table (bit mode) |
(Word 4) COMMREQ Status Word Pointer Offset: This word contains the offset within the memory type selected. The status word pointer offset is a
For information on the contents of the COMMREQ Status word, see Section 4.
(Word 5): Reserved. Set to zero.
(Word 6): Reserved. Set to zero.
(Words 7 - 31) Data Block: The Data Block defines the Channel command to be per- formed. For information on how to fill in the Channel command information, see Sec- tion 3.
TCP/IP Ethernet Communications User's Manual ± January 1996 |
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