Siemens Simatic Operating Instructions Manual page 42

Functions
4.1 CANopen
Status information
The following status information is transmitted cyclically from the PN/CAN LINK to the
S7 controller:
Table 4- 7
Bit
7
6
5 ... 3
2
40
Structure of status information in the PROFINET IO data
(from PN/CAN LINK to S7 controller, 1 byte)
Meaning Possible values
Reserved -- --
Reset ac- 0 The PN/CAN LINK is
knowledg- ready for reset.
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 Reserved
LINK state
1 PN/CAN LINK state "Pre-
Operational"
2 PN/CAN LINK state "Op-
erational"
3 PN/CAN LINK state
"Stopped"
4 ...7 Reserved
Group sta- 0 There are receive OD
tus of all entries whose values have
data not yet been updated by a
corresponding PDO since
the last reset.
1 All receive OD entries
have been updated at
least once by a PDO or
SDO since the last reset.
Note
--
A reset acknowledgment bit is used in
the data that are transmitted cyclically
from the PN/CAN LINK to the S7 con-
troller to provide feedback to the S7
controller regarding the reset of the
CANopen side. As soon as the com-
mand for resetting the CANopen side
has been received, this bit is set to "1".
The S7 controller must then set the reset
bit to "0". When the reset of the CANo-
pen side is complete, the PN/CAN sets
the reset acknowledgment bit to "0".
--
--
--
--
--
--
--
SIMATIC PN/CAN LINK
Operating Instructions, 03/2018, A5E39895388-AB