10-59
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 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.
z 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 Command name Code Command name
0102 hex MEMORY AREA WRITE 2101 hex ERROR CLEAR
0103 hex MEMORY AREA FILL 2103 hex ERROR LOG POINTER CLEAR
0105 hex MEMORY AREA TRANSFER 2203 hex SINGLE FILE WRITE
0202 hex PARAMETER AREA WRITE 2204 hex FILE MEMORY FORMAT
0203 hex PARAMETER AREA FILL (CLEAR) 2205 hex FILE DELETE
0307 hex PROGRAM AREA WRITE 2207 hex FILE COPY
0308 hex PROGRAM AREA CLEAR 2208 hex FILE NAME CHANGE
0401 hex RUN 220A hex MEMORY AREA-FILE TRANSFER
0402 hex STOP 220B hex PARAMETER AREA-FILE TRANSFER
0702 hex CLOCK WRITE 220C hex PROGRAM AREA-FILE TRANSFER
0C01 hex ACCESS RIGHT ACQUIRE 2215 hex CREATE/DELETE DIRECTORY
2301 hex FORCED SET/RESET
2302 hex FORCED SET/RESET CANCEL
CS/CJ CS/CJ
Equipment
Network
Controller
Allowed to
write/
control PLC
Network
Network
System control/monitoring computer
Allowed to
write/control PLC
Monitoring computer
Not allowed to
write/control PLC
To Next Page
Loading...
Need help?
General