Festo CPX-CMAX-C1-1 User Manual

4. Faults and diagnostics
4−31
Festo P.BE−CPX−CMA X−CONTROL−EN en 0908NH
4.3 Diagnostic parameters
4.3.1 Latest diagnostic status
The CMAX offers various parameters for the current diagnos
tic messages.
PNU
Brief description
220 Active fault messages bit−encoded
221 Active warning messages, bit−encoded
224 Currently indicated fault ’Exx’ on the display
225 Currently active fault level
226 Current warning to be indicated in the FCT
227 Error status, bit−encoded for FCT
Tab.4/4: Diagnostic parameters
Parameter
Description
Bit−encoded messages
PNU 220
PNU 221
Each parameter is a bitfield consisting of three uint32 values and thus
contains 3x 32 bits = 96 bit memory capacity. Each of these bits in this
array represents an error number. If it is set, the corresponding fault
message is active.
Example:
PNU 220:01 = 0x00000001 Bit 0 set E01 active
PNU 220:02 = 0x00000040 Bit 38 (32+ 6) set E39 active
PNU 220:03 = 0x00030000 Bit 80 (32 + 32 + 16) set E81 active
Bit 81 (32 + 32 + 17) set E82 active
This representation is optimized for evaluation by a PLC, since this bit en
coding can be used directly to activate an MMI.
PNU 220: contains current faults
PNU 221: contains current warnings
Message on the dis
play
PNU 224
PNU 226
The PNU 224 contains the fault number currently being shown on the dis
play. This makes synchronisation between the display in the FCT and the
CMAX possible. It is always the fault that occurred first that is displayed.
The PNU 226 contains the warning number the FCT is supposed to display.
The warning is not shown on the CMAX display.

Festo CPX-CMAX-C1-1 Specifications

General

Brand	Festo
Model	CPX-CMAX-C1-1
Category	Controller
Language	English