12 diagnostics – Lenze E94AYCPM User Manual
Page 84
12
Diagnostics
12.2
Diagnostics with the »Engineer«
84
Lenze · E94AYCPM communication module (PROFIBUS®) · Communication Manual · DMS 12.0 EN · 11/2012 · TD17
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Querying the current bus status
/
indicate the current PROFIBUS state in bit-coded form:
From software version 01.21, the current DP states are displayed in C13868 / C14868 (see fig. [11-
1], chapter Short-time interruption of PROFIBUS communication
).
Bit assignment
Description
Bit 3
Bit 2
Bit 1
Bit 0
Reserved
Bit 5
Bit 4
Status of the DP state machine (DP-STATE)
0
0
WAIT_PRM
The slave waits for a parameter data telegram after
acceleration. Other types of telegrams will not be processed.
Data exchange is not yet possible.
0
1
WAIT_CFG
The slave waits for the configuration telegram that specifies
the number of input and output bytes. The master informs
the slave about the number of I/O bytes that will be
transferred.
1
0
DATA_EXCH
If the parameter settings as well as the configuration have
been accepted by the firmware and by the application, the
slave state changes to DATA_EXCH ("Data Exchange",
exchange of user data with the master).
1
1
Not possible
Bit 7
Bit 6
Status of the watchdog state machine (WD-STATE)
0
0
BAUD_SEARCH
The PROFIBUS slave is able to detect the baud rate
automatically.
0
1
BAUD_CONTROL
After recognising the correct baud rate, the slave status
changes to BAUD_CONTROL and the baud rate is monitored.
1
0
DP_CONTROL
The DP_CONTROL state serves for response monitoring of
the PROFIBUS master.
1
1
Not possible
Bit 11 Bit 10 Bit 9
Bit 8
Detected PROFIBUS baud rate
0
0
0
0
12 Mbps
0
0
0
1
6 Mbps
0
0
1
0
3 Mbps
0
0
1
1
1.5 Mbps
0
1
0
0
500 kbps
0
1
0
1
187.5 kbps
0
1
1
0
93.75 kbps
0
1
1
1
45.45 kbps
1
0
0
0
19.2 kbps
1
0
0
1
9.6 kbps
Bit 15 Bit 14 Bit 13 Bit 12
Reserved