Siemens Simatic Operating Instructions Manual page 32

Functions
4.1 CANopen
Bit
2
1 ... 0
1) The error counters customary in CAN and their associated thresholds are internal functions that are
not visible to the user.
Note
For values made up of multiple bits, the first bit is the MSB and the last bit is the LSB.
Example: Bit 1 ... 0 = "2" means that bit 0 = "0" and bit 1 = "1".
30
Meaning Possible values
Group sta- 0 There are receive OD entries
tus of all whose values have not yet been
data updated by a corresponding PDO
since the last reset.
1 All receive OD entries have been
updated at least once by a PDO
since the last reset.
State of the 0 Off
CAN con-
troller
1 Bus Off
2 Error Passive
3 Error Active
Note
--
--
When specified accordingly by the
S7 controller.
Error counter has exceeded the
1)
specified threshold, or PN/CAN
LINK needs more than 2 seconds
to synchronize itself to the CAN
bus.
As a result, the PN/CAN LINK
stops transmitting/receiving any
packages.
Error counter has reached the
1)
specified threshold.
The PN/CAN LINK continues to
transmit/receive packages.
Error counter is below a specified
1)
threshold.
This is the normal state. Everything
is okay.
SIMATIC PN/CAN LINK
Operating Instructions, 03/2018, A5E39895388-AB