Communication
SIMOCODE pro
GWA 4NEB 631 6050-22 DS 03
12-21
12.6 Evaluating diagnostics data
The way in which the diagnostics data is read out depends in which DP
master system you have integrated SIMOCODE pro and how the integration
was carried out (see Chapter 12.5 "Integration of SIMOCODE pro in the DP
master systems").
12.6.1 SIMOCODE pro integrated with GSD
DP master with DPV1 alarm support (DPV1 alarm mode)
(e.g. all newer SIMATIC S7-300/400-DP master systems)
The diagnostics data is transmitted and evaluated via diagnostic alarms in
DP master systems with DPV1 alarm support.
A precondition is that the alarms in the PROFIBUS configuration tool
(diagnostic alarms, process alarms) are enabled.
You can ascertain in which DP alarm mode the integration has been carried
out and whether the alarms are enabled using the configuration tool in the
properties of the DP slave. In SIMATIC STEP7 this is carried out in HW
Config via the properties of the DP slave.
• Response and process in STEP7
A diagnostic alarm (OB 82) is triggered in the CPU for every new device fault,
whereas a process alarm (OB 40) is triggered for all new process faults,
warnings and status information. If OB 82 or OB 40 are not programmed, the
CPU goes into "STOP" mode.
• Alarms from a DPV1 slave received with STEP7
The alarms are read directly in OB 82 or OB 40 with the SFB 54 "RALRM".
The data region which is addressed with the SFB 54 via the "AINFO"
parameter contains the alarm information described in Section "Diagnostic
alarm - configuration" and Section "Process alarm - configuration". The first
byte which is read corresponds to byte 28.
Note
The interface of the SFB 54 "RALRM" is identical to the FB "RALRM" as
defined in the "PROFIBUS Guideline PROFIBUS Communication and Proxy
Function Blocks according to IEC 61131-3" standard.
You will find further information about SFB 54 in the STEP7 online help.
DP master without DPV1 alarm support (DPV0 alarm mode)
(e.g. all older SIMATIC S7-300/400-DP master systems)
SIMOCODE pro diagnostics data can be evaluated via device-specific
diagnostics (status information) and channel-related diagnostics (as part of
extended diagnostics, see Chapter 12.4.3 "Configuration of the slave
diagnostics") in DP master systems without DPV1 alarm support.
You can ascertain in which DP alarm mode the integration has been carried
out using the configuration tool in the properties of the DP slave.
Device-specific diagnostics contain detailed information about faults,
warnings and status information which are recorded by the process via
SIMOCODE pro. Information concerning hardware faults is transmitted via
channel-related diagnostics.
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