Block 5: Status Of The Event List Via Profibus-Dp - Siemens SIPROTEC 7SA522 Manual

PROFIBUS Communication modules
1.2.5

Block 5: Status of the event list via PROFIBUS-DP

EvSize
EvEntr
EvCtrl
24
Block 5 is only available if the selected mapping file supports an event list via PROFI-
BUS-DP (ref. to chap. 2.5) and contains information about the status of transmission
of indications using the event list mechanism.
Number of the parameterized (at most possible) entries in the event list on the PROFI-
BUS communication module (see GlobalSection.DP_EvtLst_ListSize).
Number of entries which are stored in the event list and number of entries which are
offered to the master in the message blocks of the PROFIBUS-DP telegram, e.g.:
EvEntr: 12/3
Twelve entries are currently contained in the event recorder and additionally three
entries are currently offered to the PROFIBUS-DP master in the message blocks of
the PROFIBUS-DP telegram.
The receipt of the evaluation of these three entries in the message blocks is expected
from the PROFIBUS-DP master.
A buffer overflow is also shown in this line for the duration of signaling of this indication
to the PROFIBUS-DP master, e.g. (with EvSize equal 100):
EvEntr: 100/3, Ovfl.
Current contents of the handshake bytes "Control_I" (sent to the PROFIBUS-DP mas-
ter, ref. to chap. 2.5.2.1) and "Control_O" (received last from the PROFIBUS-DP mas-
ter, ref. to chap. 2.5.2.2).
The display
EvCtrl: 40h-30h T-R
means e.g., that message blocks are offered to the master with message block num-
ber 4 but no receipt was received for this because the last received message block
number is 3.
The text T-R indicates the data direction for the two values of the handshake bytes
from view of the SIPROTEC device (T = Tx, to the master; R = Rx, from master).
SIPROTEC PROFIBUS-DP - Communication profile
C53000-L1840-B001-03