Festo CPX-FB33 Operating Instructions Manual page 19

Parameterisation
Bus node parameters
Filter for combining channel alarms (channel
bundling)
– Only available for bus nodes from Rev 20.
Analogue process value representation/byte
sequence
Tab. 15: Bus node parameters
Also consider the set bus node parameters in the user programs, in particular the byte sequence.
If the bus node of an earlier revision is used, the parameters are displayed in the software, but cannot
be set.
Festo — CPX(-M)-FB33/34/35/43/44/45 — 2022-05f
Description/setting options
– Inactive:
Channel alarms are reported individually via
the network.
– Active:
Channel alarms, e.g. as a result of short circuit
or undervoltage, are summarised and trans-
mitted as a common message over the net-
work; the error is also displayed by the corre-
sponding flashing LED on the bus node.
Special bus node parameter in Intel/Motorola
format - defines the representation of process
values of the analogue modules - setting
options:
– Byte Order Intel, LSB-MSB, "Little Endian";
Factory setting: process values are displayed
in Intel format. The least significant bit is on
the right and the most significant bit on the
left.
– Byte order Motorola, MSB-LSB, "Big Endian":
process values are displayed in Motorola
format. The most significant bit is on the right
and the least significant bit on the left.
This parameter can also be set via the I/O diag-
nostic interface using function number 4402 in
bit 7:
– Value "0": Intel, LSB-MSB; factory setting
– Value "1": Motorola, MSB-LSB
The setting of the byte sequence depends on
the control system and the associated user pro-
grams: select the byte sequence used in the con-
trol system.
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