Behaviour After Lost Connection To The Device; Operating Mode "Automatic Configuration - Festo CPX-CTEL4-M12-5POL Manual

4. Diagnostics and error handling
4.7

Behaviour after lost connection to the device

4.7.1 Operating mode "Automatic configuration"

Festo P.BE-CPX-CTEL-EN en 1205NH
With an interruption of the communication between the CTEL
master module and a device (e.g. through a wire break), the
CTEL master module puts out various diagnostic/error mes-
sages. These are (also) dependent on the selected operating
mode and the setting of the parameter "I-port configuration".
When communication with the device is interrupted, the CTEL
master module issues the error "I-port device missing/failed"
(CPX error number 57).
If input bytes are assigned for the separated module in the
CPX system, these are automatically set to "0".
For existing output bytes, their last known status is saved.
After an interruption is determined, the relevant I-port is
queried cyclically and checked for a connection-capable
device.
If a device is recognised, the following procedures are then
possible:
– The exact same device (same serial number) is recog-
nised that was connected to the CTEL master module
prior to the interruption.
In this case, the error in the module is reset and the sys-
tem can be further operated immediately.
– An identically constructed device (same number of I/Os,
different serial number) is recognised.
In this case, the error in the module is also reset and the sys-
tem can be immediately operated further.
– Another device is recognised.
An "I-port configuration error" is reported on the dia-
gnostics channel of the corresponding I-port.
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