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S7-300 Automation System, Hardware and Installation: CPU 31xC and CPU 31x
A5E00105492-03
11-23
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Table 11-13 Structure of station status 1 (byte 0)
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0 DP slave cannot be addressed by DP master. • Is the correct DP address set on the DP
slave?
• Is the bus connector in place?
• Does the DP slave have power?
• Correct configuration of the RS485
Repeater?
• Perform a reset on the DP slave.
1 DP slave is not ready for data exchange. • Wait for the slave to complete start-up.
2 Configuration data sent by DP master to the DP
slave is inconsistent with slave configuration.
• Was the software set for the correct
station type or DP slave configuration?
3 Diagnostic interrupt, generated by a RUN to
STOP transition on the CPU or by the SFB 75
Diagnostic interrupt, generated by a STOP to
RUN transition on the CPU or by the SFB 75
• You can read the diagnostic data.
4 Function not supported; e.g. changing the DP
address at software level
• Check configuration data.
5 This bit is always “0”. • -
6 DP slave type inconsistent with software
configuration.
• Was the software set for the right station
type? (parameter assignment error)
7 DP slave was configured by a DP master other
than the master currently accessing the slave.
• The bit is always 1 if, for example, you are
currently accessing the DP slave via PG or
a different DP master.
The configuring master's DP address is
located in the ”Master PROFIBUS address”
diagnostics byte.
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Table 11-14 Structure of station status 2 (byte 1)
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0 The DP slave requires new parameters and configuration.
1 A diagnostic message was received. The DP slave cannot resume operation until the error
has been cleared (static diagnostic message).
2 This bit is always ”1” if a DP slave exists with this DP address.
3 The watchdog monitor is enabled on this DP slave.
4 DP slave has received control command "FREEZE".
5 DP slave has received control command "SYNC".
6 This bit is always "0".
7 DP slave is disabled, that is, it has been excluded from cyclic processing.