Siemens SIMATIC NET PROFIBUS Manual de servicio Pagina 145

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Description of the DP Functions, Data, and Error Codes
DP Base Programming Interface for CP 5613/CP 5614
C79000-G8976-C108-01
145
Reading without Consistency
To read without consistency, the locking and release of the data area are simply
omitted.
!
Warning
The lock is canceled by the following:
Locking a different slave to read its data,
Locking a different slave to read its diagnostic information (Section 4.3.2)
Or by triggering a write job using the corresponding control register (Section
4.3.3).
Note 1
The data is only valid when the master is in the OPERATE or CLEAR/
AUTOCLEAR mode and the slave is in the READY state.
Note 2
The memory area with index 127 contains the data of the slave module of the
CP 5614.
Note 3
The input data are not updated as long as the slave reports static diagnostic data
(Section 4.6.2, byte 2 - stationstatus_2, bit 1).
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