Siemens Simatic Operating Instructions Manual page 31

Status information
The following status information is transmitted cyclically from the PN/CAN LINK to the
S7 controller:
Table 4-2
Bit
7
6
5 ... 3
SIMATIC PN/CAN LINK
Operating Instructions, 03/2018, A5E39895388-AB
Structure of status information in the PROFINET IO data
(from PN/CAN LINK to S7 controller, 1 byte)
Meaning Possible values
NMT status 0 One/multiple slaves are rebooted
feedback or the gateway state is not "CAN
network Pre-Operational" or
"CAN network Operational"
1 Gateway state is "CAN network
Pre-Operational" or "CAN net-
work Operational" and all nodes
have the gateway state that is
signaled in bit 5 ... 3.
Reset ac- 0 PN/CAN LINK is ready for reset.
knowledg-
ment bit
1 The PN/CAN LINK is currently
performing or has performed a
reset but the reset bit of the S7
controller is still set to "1".
PN/CAN 0 Booting slaves
LINK state
1 CAN network "Pre-Operational"
2 CAN network "Operational"
3 CAN network "Stopped"
4 Reserved
5...7 Reserved
4.1 CANopen
Note
Bit indicates whether all slaves
have already returned the NMT
status that matches the PN/CAN
LINK status.
--
To provide feedback about the
resetting of the CANopen side to
the user program running on the
S7 controller, the reset acknowl-
edgment bit is used in the data that
is cyclically sent from the PN/CAN
LINK to the S7 controller. As soon
as the command for resetting the
CANopen side has been received,
this bit is set to "1". Afterwards the
user program running on the S7
controller must set the reset bit to
"0". When the reset of the CANo-
pen side is complete, the PN/CAN
LINK sets the reset acknowledg-
ment bit to "0".
--
--
--
--
--
If this state is being signaled con-
tinuously, bit 2 in the control byte
must be set to "1".
--
Functions
29