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FX2N-32CAN Communication Module
4.2.5
The Watch Dog Timer Setting, BFM #26
The Watch Dog Timer setting is stored in BFM #26 in units of 10 ms. A WDT error will occur if
there is no FROM or TO instruction to any BFM for the time specified. After the WDT has
expired, it must be reset by writing the current or a new value to BFM #26. When the value 0
is written to BFM #26, the FROM/TO watchdog timer is disabled.
During normal operation as soon as the module receives a FROM or TO instruction, the WDT
will reset to time zero.
Note: No Emergency Message will be transmitted if the WDT is disabled and the FROM/TO
communication stops and the FX
4.2.6
The Node Address, BFM #27
The CANopen node supports setting of the node address by the FX
instruction. The actual address is displayed in BFM #27. The Node address must be set for
communication to take place via the CANopen bus.
In case of an address change by TO instruction, the new address value (1...127
written to BFM #27. The new address will only become effective after a power down of the
host PLC or after a restart command written to BFM #25.
-32CAN module is in operational mode.
2N
Buffer Memory Structure 4.
/FX
PLC via the TO
2N(C)
1N
) must be
d
4-5
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