Siemens SPC3 - Manual (Page 34)

PROFIBUS Interface Center SPC3
Page 32 V1.3 SPC3 Hardware Description
2003/04 Copyright (C) Siemens AG 2003. All rights reserved.
Address Bit Position Designation
Control
Register 7 6 5 4 3 2 1 0
10H 0 0 0 0 0 0 User_Cfg_Data_Okay
0 0 User_Cfg_Finished
0 1 Cfg_Conflict
1 1 Not_Allowed
Address Bit Position Designation
Control
Register 7 6 5 4 3 2 1 0
11H 0 0 0 0 0 0 User_Cfg_Data_Not_Okay
0 0 User_Cfg_Finished
0 1 Cfg_Conflict
1 1 Not_Allowed
Figure 6.7: Coding of the User_Cfg_Data_Not/_Okay_Cmd
6.2.4 Slave_Diagnosis (SAP60)
6.2.4.1 Diagnostics Processing Sequence
Two buffers are available for diagnostics. The two buffers can have varying lengths. SPC3 always has one
diagnostics buffer assigned to it, which is sent for a diagnostics call-up. The user can pre-process new
diagnostics data in parallel in the other buffer. If the new diagnostics data are to be sent now, the user uses
the ‘New_Diag_Cmd’ to make the request to exchange the diagnostics buffers. The user receives
confirmation of the exchange of the buffers with the ‘Diag_Puffer_Changed Interrupt.’
When the buffers are exchanged, the internal ‘Diag_Flag’ is also set. For an activated ‘Diag_Flag,’ SPC3
responds during the next Write_Read_Data with high-priority response data that signal the relevant master
that new diagnostics data are present at the slave. Then this master fetches the new diagnostics data with a
Slave_Diagnosis telegram. Then the ‘Diag_Flag” is reset again. If the user signals ‘Diag.Stat_Diag = 1,’
however (static diagnosis, see the structure of the diagnostics buffer), then ‘Diag_Flag’ still remains
activated after the relevant master has fetched the diagnosis. The user can poll the ‘Diag_Flag’ in the
status register to find out whether the master has already fetched the diagnostics data before the old data is
exchanged for the new data.
Status coding for the diagnostics buffers is stored in the‘Diag_bufferSM’ processor parameter. The user can
read this cell with the possible codings for both buffers: ‘User,’ ‘SPC3,’ or ‘SPC3_Send_Mode.’
Address
Bit Position Designation
Control
Register 7 6 5 4 3 2 0
0CH 0 0 0 0 D_Puf2 D_Puf1 Diag_Puffer_SM
X1 X2 X1 X2 See below for coding.
X1 X2 Coding
0 0 Each for the D_Buf2 or D_Buf1
0 1 User
1 0 SPC3
1 1 SPC3_Send_Mode
Figure 6.8: Diag_Buffer Assignment
The ‘New_Diag_Cmd’ is also a read access to a defined processor parameter with the signal as to which
diagnostics buffer belongs to the user after the exchange, or whether both buffers are currently assigned to
SPC3 (‘no Puffer’, ‘Diag_Puf1’, ‘Diag_Puf2’).