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9 PLC Setup
CJ2 CPU Unit Software User’s Manual
9-3 PLC Setup Settings
9
9-3-8 FINS Protection
z Validate FINS Write Protection via Network
This parameter determines whether write protection is used for FINS commands over a network.
This parameter is used to prevent accidentally writing memory via a network connected with a con-
nection other than a serial connection. If this parameter is enabled, writing will be possible only from
nodes set for the Nodes excluded from protection targets parameter.
z Nodes Excluded from Protection Targets
Set the nodes for which writing will be enabled even when protection is enabled.
Set the nodes and networks from which FINS write operations will be enabled even when protection
is enabled. The total number of nodes set to be excluded from write protection will be automatically
set.
A maximum of 32 nodes can be set. If these settings are not made (i.e., if the total number of nodes
is 0), write operations will be disabled for all nodes but the local node
*1 This setting is valid only when FINS write protection has been enabled.
*2 255 (FF hex) can be set to include all nodes in the specified network.
9-3-8 FINS Protection
Settings for FINS Write Protection via Network
Parameter Setting Default Function
Related flags
and words
Validate FINS
write protec-
tion via network
ON: Disable FINS write protection
OFF: Enable FINS write protection
OFF Enables or disables write protection for
the CPU Unit from FINS command sent
over a network (i.e., all connections
except for serial connections).
---
Parameter Settings Default Function
Related flags
and words
Nodes excluded
from protection
targets
*1
0 to 127 --- FINS command source network
address
---
1 to 255
*2
--- FINS command source node address ---