Siemens SINAMICS S120 Function Manual page 694

Communication
10.1 Communication according to PROFIdrive
Measured values could be lost if more probe edges occur in the DP cycle than can be
transferred in the telegram. In MT_DIAG bits 0..7, the corresponding bit
"MTx_TELEGRAMM_VOLL" is then set. It indicates a loss of measured values. Reducing the
measuring frequency or selecting a telegram block with higher transfer capacity prevents the
loss of measured values.
Note
Probe diagnostics
The "Measured value buffer full" bit allows you to identify that the measured values in the
telegram no longer represent the first edges in the measuring time period, because all the
measured values in the measured value buffer have already been overwritten by more
recent values.
The probe diagnostics word PZD is a BiCo parameter, which is automatically connected with
the new display parameter r0567 when selecting the telegram block. After activating the
measuring function for several measured values per DP cycle, the diagnostic bits are stored
for the specific probes in r0567 for transfer.
Table 10- 51 Probe diagnostic word r0567
Bit
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
The measuring function also continues to run after setting the diagnostic bits
"TELEGRAMM_VOLL" or "MESSPUFFER_VOLL". Without handshake, diagnostic bits in
MT_DIAG are transferred only one DP cycle before they are overwritten with zero or new
states.
692
Name
MT1_TELEGRAMM_VOLL
MT2_TELEGRAMM_VOLL
MT3_TELEGRAMM_VOLL
MT4_TELEGRAMM_VOLL
MT5_TELEGRAMM_VOLL
MT6_TELEGRAMM_VOLL
MT7_TELEGRAMM_VOLL
MT8_TELEGRAMM_VOLL
MT1_MESSPUFFER_VOLL
MT2_ MESSPUFFER_VOLL
MT3_ MESSPUFFER_VOLL
MT4_ MESSPUFFER_VOLL
MT5_ MESSPUFFER_VOLL
MT6_ MESSPUFFER_VOLL
MT7_ MESSPUFFER_VOLL
MT8_ MESSPUFFER_VOLL
Function Manual, (FH1), 01/2013, 6SL3097-4AB00-0BP3
Drive functions