Festo CTEU-CO, Manual, Functions And Maintenance

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1. Commissioning
1-8
Festo P.BE-CTEU-CO-OP+MAINT-EN en 1101NH
1.3.2 Rules for internal I/O mapping
The following rules are applied when using the PDOs:
– The telegrams are filled in ascending order.
– Mapping can be used individually via both PDOs.
– The inputs and outputs are factory-arranged according to
the standard mapping function.
– The I/Os are arranged according to the standard mapping
function when a device is connected and the bus node is
switched on.
– Process data allocation between the bus node and valve
terminal remains in effect even if the two modules are
separated, provided that the bus node remains under
voltage during the separation. Otherwise the mapping
information of connected devices is deleted.
1.3.3 I/O linking by COB-IDs
COB-IDs are made up of the function code (see Tab. 1/3) and
the address of the respective fieldbus station (Node ID):
10 9 8 7 6 5 4 3 2 1 0
Function Code Node ID
Tab. 1/2: Configuration of COB-IDs