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Request Nmt - Mitsubishi Electric MELSEC L-Series User Manual

Programmable logic controllers.
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Network Management
4.8.8

Request NMT

This object indicates at the NMT Master the current NMT state of a unique CANopen€ device in the
network. The sub-index corresponds to the node-ID of the CANopen€ devices in the network. The
sub-index 80
sages.
A NMT message can be requested by using the SDO write access in the NMT master. Please consider
to use this carefully, because if the request is a Stop or Pre-Operational request, the NMT start-up mas-
ter will not set the target node back to Operational automatically until the next restart.
NOTE
If a node for heartbeat consuming is activated and a boot-up message is received from this node,
the NMT state Pre-operational will be displayed for this node until the next heartbeat is received
for this node.
A read access is possible by using the buffer memory (refer to section 3.5.16).
Object 1F82
Value (hex)
00
01
02–03
04
05
06
07
08–7E
7F
80–83
84
85
86
87
88–8E
8F
90–FE
Tab. 4-31: Description for object 1F82
MELSEC-L Series – CANopen€ Module ME3CAN1-L
represents all nodes. Only the NMT Master is allowed to send NMT node control mes-
H
, Sub-index 01
to 80
H
H
H
Description
Read
NMT state unknown
CANopen€ device missing
Reserved
NMT state Stopped
NMT state Operational
Reserved
Remote Node: Reserved
Local Node: NMT state Reset communication
Reserved
NMT state Pre-operational
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
H
: Request NMT
Write
Reserved
Reserved
NMT service Stop remote node
NMT service Start remote node
NMT service Reset node
NMT service Reset communication
NMT service Enter pre-operational
NMT service Stop remote node excluding NMT
master
NMT Slave will be set into the NMT state Stopped,
but the NMT Master will stay in its current NMT
state.
NMT service Start remote node excluding NMT
master
NMT Slave will be set into the NMT state Opera-
tional, but the NMT Master will stay in its current
NMT state.
NMT service Reset node excluding NMT master
NMT Slave will be set into the NMT state Reset node,
but the NMT Master will stay in its current NMT
state.
NMT service Reset communication excluding NMT
master
NMT Slave will be set into the NMT state Reset com-
munication, but the NMT Master will stay in its cur-
rent NMT state.
NMT service enter Pre-operational excluding NMT
master
NMT Slave will be set into the NMT state Pre-opera-
tional, but the NMT Master will stay in its current
NMT state.
Functions
4 – 47

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