Omron Sysmac NJ-series User Manual

10 FTP Server
10-4
NJ/NX-series CPU Unit Built-in EtherNet/IP Port User’s Manual (W506)
 Restrictions on Login Name and Password Setting
The following restrictions apply to login names and passwords.
• Only single-byte alphanumeric characters can be used in the login name and password. The login
name and password are case sensitive.
• 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 alphanu-
meric 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 from multiple sources with
communications 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 communications commands and perform exclusive control.
• Exclusive Control When Accessing the Same File on the SD Memory Card
*1 The instructions include the SD Memory Card operation instructions and the FTP client communications
instructions.
First access
Instructions
*1
File Operations from
the Sysmac Studio
FTP server
Reading Writing Reading Writing Reading Writing
Later access
Instruc-
tions
Reading
Exclusive control is per-
formed automatically,
and an error occurs for
the instruction that is
executed later.
Exclusive
control is
not
required.
Perform
exclusive
control.
Exclusive
control is
not
required.
Perform
exclusive
control.
Writing
Perform
exclusive
control.
Perform
exclusive
control.
File
operations
from the
Sysmac
Studio
Reading
Exclusive
control is
not
required.
Perform
exclusive
control.
--- --- Exclusive
control is
not
required.
Writing
Perform exclusive con-
trol.
--- --- Perform
exclusive
control.
FTP server
Reading
Exclusive
control is
not
required.
Perform
exclusive
control.
Exclusive
control is
not
required.
Perform
exclusive
control.
--- ---
Writing Perform exclusive control. --- ---

Omron Sysmac NJ-series Specifications

General

Brand	Omron
Model	Sysmac NJ-series
Category	Computer Hardware
Language	English