9. Fieldbus interface | 9.2 - Scale protocol | 168
9.2.7 Special note for DeviceNet and EtherNet/IP
With these fieldbus types, the sequence of the bytes (only applicable for
words and individual bytes) is inverted.
With long words, this problem does not arise due to compensation by the
firmware.
Sequence of data bytes 0–3:
Standard sequence Sequence for Device
Net and EtherNet/IP
Byte 0 Read data 0
(MSB)
Byte 0 Read data 3 (LSB)
Byte 1 Read data 1 Byte 1 Read data 2
Byte 2 Read data 2 Byte 2 Read data 1
Byte 3 Read data 3 (LSB) Byte3 Read data 0
(MSB)
Consequently, the sequence on the PLC side must be changed when using
the "DeviceNet" and "EtherNet/IP" fieldbus types.
To Next Page
Loading...
