Module Number And Diagnostic Status; Error Number - Festo CPX System Manual

B. Parameters and data of the CPX terminal
System diagnostic data: Module number and diagnostic status
Function no. 1937
Description Function no. 1937 specifies whether there is diagnostic data and contains, where
applicable, the number of the first module on which a fault has occurred. With
the aid of the module number of the faulty module you can ascertain the function
numbers of the relevant diagnostic data.
Bit Bit 0 ... 5: Module number of the first
Bit 6:
Bit 7:
Values Bits 0...5: 0...47 (module number)
Bit 6:
Note Function no. 1938 contains the relevant error number.
See Fig. 5/7 and Fig. 5/9 for examples.
Tab. B/40: Module number and diagnostic status
System diagnostic data: Error number
Function no. 1938
Description Contains the current error number
Bit Bit 0 ... 7 : error number
Values 0 ... 255
Note See section 5.2.3 for possible error messages.
Function no. 1937 specifies whether there is diagnostic data and contains, where
applicable, the number of the first module on which the fault occurred.
Tab. B/41: Error number
Festo P.BE−CPX−SYS−EN en 0902e
faulty module
Diagnostic status
Reserved
1 = there is diagnostic data
0 = there is no diagnostic data

: error number

[First faulty module]
[Fault number]
B−33