Omron CJ2 CPU UNIT SOFTWARE User Manual

10-57
10 CPU Unit Functions
CJ2 CPU Unit Software User’s Manual
10-6 Security Functions
10
10-6-4 Write Protection from FINS Commands
z Example Write Protection Patterns
Connection pattern Diagram (example)
Write protec-
tion
From a computer
through a direct
serial connection
Direct connec-
tion to PLC
Cannot be
applied.
Gateway connec-
tion (Serial-to-
network) to PLC
Can be
applied.
From a computer through a direct net-
work connection
Can be
applied.
From another PLC in the network Can be
applied.
PLC
Computer
Write-protection not effective
Peripheral USB port
RS-232C port
USB port: USB (Toolbus)
Serial port: Toolbus
RS-232C port or 422A/485 port
on a Communications Board/Unit
PLC #1
PLC #2
Computer
Network
The CPU Unit in PLC #2
can be write-protected.
USB port: USB (Toolbus)
Serial port: Toolbus
PLC #1
PLC #2
Computer
Network
The CPU Unit in PLC #2
can be write-protected.
PLC#1
PLC#2
CMND
If the CMND instruction is used to send
a FINS command (requesting a write
operation) to the CPU Unit of PLC #2,
the operation is not performed.
The CPU Unit in PLC #2
can be write-protected.
Network

Omron CJ2 CPU UNIT SOFTWARE Specifications

General

Brand	Omron
Model	CJ2 CPU UNIT SOFTWARE
Category	Software
Language	English