38
CJ1-H/CJ1M CPU Unit Ver. 2.0 Upgrades Section 1-5
By limiting the number of nodes that can write to the PLC, it is possible to pre-
vent system problems caused by unintentional overwrites during data moni-
toring.
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.
CS/CJ-series PLC
Equipment
Network
Controller
Allowed to
write/con-
trol PLC
Network
Network
System control/monitoring computer
Allowed to
write/control PLC
Monitoring computer
Not allowed to
write/control PLC
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
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