Bfm #900 To #963] Nmt Error Control Status - Mitsubishi Electric MELSEC-F FX3U-CAN User Manual

FX -CAN User's Manual
3U
6.24

[BFM #900 to #963] NMT Error Control Status

This BFM displays the Node Guarding and Heartbeat status.
Note
• When resetting the local NMT error latch, write H0 to the corresponding bit of this BFM.
• If bit 2 to 7 of any node is ON, BFM #29 bit 10 will be set.
• If the bit 10 in BFM #29 is reset to OFF, all failure bits in BFM #900 to #963 will be reset to OFF.
BFM No.
BFM #900
BFM #901
BFM #902
BFM #903
BFM #962
BFM #963
Status Flags
Bit No.
Bit 0 Node guarding
Bit 1 Heartbeat
Bit 2 Node guarding
Bit 3 Node guarding
Bit 4 NMT startup failed.
Bit 5 Node guarding
Bit 6 Node guarding
Bit 7 Heartbeat
Description
High Byte Low Byte
Node 2 status Node 1 status
Node 4 status Node 3 status
Node 6 status Node 5 status
Node 8 status Node 7 status
Node 126 status Node 125 status
Unused (H0) Node 127 status
Node Guarding is active
Heartbeat is active. This bit is set after reception of the first Heartbeat message.
One node guarding message is missed or Toggle Bit error.
No response and Lifetime elapsed
The node does not have the expected state.
Guarding failed. Node Guarding remote requests of the NMT Master was not received in the expected time.
Heartbeat is missing
6 Allocation of Buffer Memories
6.24 [BFM #900 to #963] NMT Error Control Status
Description
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