Omron SYSMAC CS1W-ETN21 Operation Manual page 107

CIO Area Allocations
Service Status (Ethernet Unit to CPU Unit)
Bit Name
00 FTP Status Flag
01 Accessing Memory,
Sending Mail
02 Accessing Memory,
Receiving Mail
03 to 07 (Not used.)
08 to 11 System Setup For-
mat
12 to 13 (Not used.)
14 Link Status
15 (Not used.)
82
TCP/UDP Open Flag (Bit 15)
Remains ON while a socket is open by means of control bit manipulation or
the CMND(490) instruction. In the case of TCP, it indicates a connection.
When the socket is closed, this flag turns OFF again. (If the socket did not
close properly, the flag remains ON.)
Check to be sure that this flag is ON before executing a send or receive
request.
15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00
n+17
Link Status
Status Manipulated
by
ON Unit FTP server operating. (FTP client
connected.)
OFF Unit FTP server on standby. (FTP client
not connect.)
ON Unit ON while CPU Unit memory is being
accessed to create a file to be
attached using the mail send func-
tion.
OFF Unit OFF when the file to be attached
has been created.
ON Unit ON while CPU Unit memory is being
accessed to store an attached file
using the mail receive function.
OFF Unit OFF when the attached file has
been stored.
--- --- ---
ON Unit Shows the current format in the CPU
Bus Unit System Setup Area by the
OFF Unit
ON/OFF status of a combination of
bits.
--- --- ---
ON Unit ON while a link is established
between hubs.
OFF Unit OFF when the link between hubs is
terminated.
--- --- ---
FTP Status (Bit 00)
Turns ON while connected to an FTP client, and OFF while not connected.
With the FTP server function only one FTP client can be connected at a time,
so while this bit is ON no other clients can connect to the server.
The FTP status is also shown by the Ethernet Unit's FTP indicator, as follows:
Not lit: FTP server on standby. (FTP status: OFF)
Lit: FTP server operating. (FTP status: ON)
System Setup Format
Unit operation
Section 4-1
FTP Status
Accessing Memory,
Sending Mail
Accessing Memory,
Receiving Mail
Reference
Operation Manual, Con-
struction of Applica-
tions, SECTION 4
Operation Manual, Con-
struction of Applica-
tions, SECTION 2
Operation Manual, Con-
struction of Applica-
tions, SECTION 3
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SECTION 2 Installation
and Initial Setup
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