Mail Receive Function Status; I/O Memory Data Formats; Accessing Memory/Receiving Mail Flag - Omron CS CJ1W-ETN21 Operation Manual

Mail Receive Function Status

3-5

Mail Receive Function Status

3-5-1

Accessing Memory/Receiving Mail Flag

Accessing Memory/
Receiving Mail Flag (Bit 02
of n+17)
3-6

I/O Memory Data Formats

IOM Format
Note
60
Response Response Status
Code
F304 Protected (File extension)
F305 File size exceeds than the
maximum size.
F4FF Other Error
The Accessing Memory/Receiving Mail Flag is located in CIO Area words
allocated to the Ethernet Unit as a CPU Bus Unit.
The leading address (n) of the allocated CIO area is determined by the Ether-
net Unit's unit number (n = CIO 1500 + 25 × unit number).
When the mail receive function receives a FileWrite, FileRead, FileDelete,
FileList, IOMWrite, or IOMRead command, the Ethernet Unit will access the
CPU Unit's I/O memory and automatically create a data file. The Accessing
Memory/Receiving Mail Flag (bit 02 of n+17) will be ON while the CPU Unit's
memory is being accessed.
15 14 13 12 11 10 09
n+17 - - - - - - -
To maintain the uniformity of the data in the data file, use this flag as a condi-
tion for write operations in the ladder program to prevent the ladder program
from overwriting the data while it is being converted to a data file.
When 5 words of hexadecimal I/O memory data (1234, 5678, 9ABC, etc.) are
being copied to an attached file in IOM format, the data is stored in the
attached file as shown in the following diagram.
Example: Binary data format with a return every 10 fields
I/O memory contents
+0 +1 +2 +3
+0 1234 5678 9ABC DEF0
+10 9ABC DEF0 1234 5678
IOM file contents
XX XX XX 12 34 56 78 9A BC DE F0 12 34
48 bytes (Reserved for system)
The IOM file format is compatible with the CPU Unit's READ DATA FILE and
WRITE DATA FILE instructions (FREAD and FWRIT) set to binary data for-
mat.
Attached file type (filename exten-
sion) is disabled in the protection set-
tings.
Attached file is too large.
Other error
08 07 06 05 04 03 02 01 00
- - - - - - - -
Accessing Memory/Receiving Mail Flag
+4 +5 +6 +7 +8
1234 5678 9ABC DEF0 1234
9ABC DEF0 1234 5678 9ABC DEF0
Section 3-5
Description
+9
5678