6 Allocation of Buffer Memories
6.24 [BFM #900 to #963] NMT Error Control Status
123
FX
3U
-CAN User's Manual
1
Introduc
tion
2
Specifi
cations
3
Inst
allati
on
4
Wi
rin
g
5
Introduc
tion of
Functions
6
All
ocation of
B
uff
er
Memor
ies
7
Interface and
D
evice P
rofile
(40
5 mode)
8
Lift Appl
icati
on
P
ro
file
(417 M
ode)
9
CAN
Layer 2
Mode
10
Comm
and
Interface
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.
Status Flags
BFM No.
Description
High Byte
Low Byte
BFM #900
Node 2 status
Node 1 status
BFM #901
Node 4 status
Node 3 status
BFM #902
Node 6 status
Node 5 status
BFM #903
Node 8 status
Node 7 status
.....
.
.....
.
.....
.
BFM #962
Node 126 status
Node 125 status
BFM #963
Unused (H0)
Node 127 status
Bit No.
Description
Bit 0
Node guarding Node Guarding is active
Bit 1
Heartbeat
Heartbeat is active. This bit is set after reception of the first Heartbeat message.
Bit 2
Node guarding One node guarding message is missed or Toggle Bit error.
Bit 3
Node guarding No response and Lifetime elapsed
Bit 4
NMT startup failed.
Bit 5
Node guarding The node does not have the expected state.
Bit 6
Node guarding Guarding failed. Node Guarding remote requests of the NMT Master was not received in the expected time.
Bit 7
Heartbeat
Heartbeat is missing
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