Lenze E94ARNE Regenerative power supply - Manual (Page 135)

EDS94ARNExxxx EN 2.3 - 06/2014
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9400 regenerative power supply module | Parameter setting
"CAN on board" system bus
Monitoring
6.9.1.1 Telegram structure
RTR telegram
 The RTR telegram from the NMT master has the following identifier:
Identifier (COB-ID) = 1792 + node address of the NMT slave
 The RTR telegram does not contain any user data.
 The RTR bit in the arbitration field of the RTR telegram is set to the LOW (dominant
level).
Response telegram
 The response telegram of the requested NMT slave has the same identifier as the RTR
telegram received from the NMT master
 The user data (1 byte) contain the NMT slave state and the toggle bit (see below
description).
NMT slave state (s)
Toggle bit (t)
 The toggle bit (t) of the response telegram has the value "0" when the node guarding
protocol is activated for the first time.
 The value of the toggle bit (t) must change with every response.
NMT slave state Data
Communication state Decimal value
(s)
(t) NMT slave state (s)
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
Stopped 4 0/1 0 0 0 0 1 0 0
Operational 5 0/1 0 0 0 0 1 0 1
Pre-operational 127 0/1 1 1 1 1 1 1 1

Note!
The toggle bit is monitored by the NMT master.
If a telegram is received with the value of the toggle bit not being changed, it will
be treated as if it had not been received; i.e. the monitoring time is not reset and
continues to pass.
The toggle bit can only be reset to "0" by the NMT master via the "reset
communication" telegram.