Minebea Intec PR5900 - Special Note for Devicenet and Ethernet IP

Negative values are output in the second complement.
8.2.7 Special note for DeviceNet and EtherNet IP
With these eldbus 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 rmware.
Sequence of data bytes 03:
Standard sequence Sequence for DeviceNet 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" eldbus types.
8.3 SPM protocol
8.3.1 Data exchange range
Overview
Byte 0 1, 2 3 4 5, 6 7
8
MOSI rdfun rdadr rdlen wrfun wradr wrlen
wrdata
MISO rdfun rdadr rdlen wrfun wradr wrlen
rddata
Write window (MOSI)
Field Size Function
rdfun 1 byte Selects the function for reading data.
Only read function codes are permitted.
rdaddr 2 bytes (MSB:LSB) Provides the address for reading.
rdlen 1 byte Provides the number of elements to be read (bits/by-
tes/words).
wrfun 1 byte Selects the function for writing data.
Only write function codes are permitted.
wraddr 2 bytes (MSB:LSB) Provides the address for writing.
wrlen 1 byte Provides the number of elements to be written (bits/
bytes/words).
wrdata
1FB-Size-8
Contains the data to be written
8 Fieldbus interface Process Controller Maxxis 5 PR 5900
EN-357 Minebea Intec