3. Diagnosis
3-12
Festo Festo P .BE CP FB13-E-EN en 9910c
3.3.2 Diagnostic information
The following diagnostic information can be requested by the
DP master from the CP system via the function Slave_Diag.
The CP system replies with an octet string of length 15. The
procedure for reading out this diagnostic information with a
SIMATIC S5/S7 system is described in chapter 3.4.2.
Structure Station status 1
Octet 1: Station status_1
Bit Meaning Explanation
0 Diag.Station_Non_Existent CP system no longer/not yet addressable. Possible
causes
– No operating volta ge
– Data cable interrupte d
– Fault in data cable
1 Diag.Station_Not_Ready CP system not yet ready for data exchange
2 Diag.Cfg_Fault The configuration data received from the master do not
agree with those ascertained by the CP system.
3 Diag.Ext_Diag There is a device- related diagnosis. Possible causes
– Cable fracture on input/out put module
– Short circuit/overload at electric outputs
– V
valves
<20.4 V
– V
valves
<10 V
– V
sensor
<10 V
4 Diag.Not_Supported log. “1”: CP system does not support the function re-
quested.
5 Diag.Invalid_Slave_Response always log. “0” (set by CP system)
6 Diag.Prm_Fault Last parametrizing telegram faulty
7 Diag.Master_Lock always log. “0” (set by CP system)
heavy print = valve terminal related bits
Fig. 3/4: Diagnostic bits station status_1
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