Omron CJ2 CPU UNIT SOFTWARE User Manual page 393

Usage
• The system can be configured so that a PLC can be written only from authorized nodes in the net-
work. (For example, use this function when the system's control/monitoring computer is the only
node allowed to write to a Controller within a piece of equipment.)
By limiting the number of nodes that can write to the PLC, it is possible to prevent system prob-
lems caused by unintentional overwrites during data monitoring.
Operations Restricted by Network FINS Write Protection
FINS Write Commands
The following FINS commands are restricted by FINS write protection when sent to the CPU Unit
through the network.
Code
0102 hex MEMORY AREA WRITE
0103 hex MEMORY AREA FILL
0105 hex MEMORY AREA TRANSFER
0202 hex PARAMETER AREA WRITE
0203 hex PARAMETER AREA FILL (CLEAR)
0307 hex PROGRAM AREA WRITE
0308 hex PROGRAM AREA CLEAR
0401 hex RUN
0402 hex STOP
0702 hex CLOCK WRITE
0C01 hex ACCESS RIGHT ACQUIRE
CJ2 CPU Unit Software User's Manual
System control/monitoring computer
Equipment
Network
Controller
Monitoring computer
Allowed to
write/
control PLC
Network
Network
CS/CJ CS/CJ
Command name
10 CPU Unit Functions
Allowed to
write/control PLC
Not allowed to
write/control PLC
Code Command name
2101 hex ERROR CLEAR
2103 hex ERROR LOG POINTER CLEAR
2203 hex SINGLE FILE WRITE
2204 hex FILE MEMORY FORMAT
2205 hex FILE DELETE
2207 hex FILE COPY
2208 hex FILE NAME CHANGE
220A hex MEMORY AREA-FILE TRANSFER
220B hex PARAMETER AREA-FILE TRANSFER
220C hex PROGRAM AREA-FILE TRANSFER
2215 hex CREATE/DELETE DIRECTORY
2301 hex FORCED SET/RESET
2302 hex FORCED SET/RESET CANCEL
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