Omron NJ Series User Manual page 399

• A login name consists of up to 12 characters.
• A password consists of 8 to 32 characters.
• Always set a password when you set a new login name. The login name will not be valid unless
a password is set for it.
• The login name is invalid if the login name is not set or characters other than single-byte alpha-
numeric characters are used.
 FTP File Transfer Mode
FTP has two file transfer modes: ASCII mode and binary mode. Before you start to transfer files,
use the type command (specifies the data type of transferred files) to select the required mode.
• To transfer a file in binary format: Select binary mode.
• To transfer a file in ASCII format: Select ASCII mode.
 Multiple Accesses to the Same File
Files accessed with the FTP server may be simultaneously accessed by multiple sources with com-
munications commands from other FTP servers or programming instructions.
Exclusive control is required to prevent multiple accesses.
This is to prevent reading and writing the same file at the same time.
The CPU Unit automatically performs exclusive control as shown below only when the following
combinations of instructions are used.
In other cases, use file operation instructions (Change File Name, Copy File, etc.) or communica-
tions commands and perform exclusive control.
• Exclusive Control When Accessing the Same File on the SD Memory Card
Instruc-
tions
L
a
t
e
File oper-
r
ations
a
from the
c
Sysmac
c
Studio
e
s
s
FTP
server
*1. The instructions include the SD Memory Card operation instructions and the FTP client communications
instructions.
NJ/NX-series CPU Unit Built-in EtherNet/IP Port User's Manual (W506)
*1
Instructions
Reading Writing
Exclusive control is per-
Rea formed automatically, and
ding an error occurs for the in-
struction that is executed
later.
Writ
ing
Exclusive Perform ex-
Rea control is clusive con-
ding not re- trol.
quired.
Perform exclusive control.
Writ
ing
Exclusive Perform ex-
Rea control is clusive con-
ding not re- trol.
quired.
Writ Perform exclusive control.
ing
First access
File operations from the
Sysmac Studio
Reading Writing
Exclusive Perform ex-
control is clusive con-
not re- trol.
quired.
Perform ex-
clusive con-
trol.
--- ---
--- ---
Exclusive Perform ex-
control is clusive con-
not re- trol.
quired.
11 FTP Server
FTP server
Reading Writing
Exclusive Perform ex-
control is clusive con-
not re- trol.
quired.
Perform ex-
clusive con-
trol.
Exclusive
control is
not re-
quired.
Perform ex-
clusive con-
trol.
--- ---
--- ---
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