Rockwell Automation 1760-DNET Pico DeviceNet Communications Module User Manual - Manual (Page 93)

Publication 1760-UM003A-EN-P - September 2005
Pico GFX Control Commands 7-13
If required, refer to the more detailed description of the marker
allocation in the Pico GFX manual. Only a small extract of this manual
is shown at this point in order to illustrate the allocation principle.
Table 6.85 Byte 0 to 2 (master) or: Byte 1 to 3 slave: Len, Type, Index
Operand Len Type Index
Marker bit M1…M96 01
hex
0B
hex
01 to 60
hex
Marker byte MB1…MB96 01
hex
0C
hex
01 to 60
hex
Marker word MW1…MW96 02
hex
0D
hex
01 to 60
hex
Marker double word MD1…MD96 04
hex
0E
hex
01 to 60
hex
ATTENTION
The function blocks and DW markers (32-bit values)
of Pico GFX operate with signed values.
Table 6.86
Applies
to MD,
MW,
MB, M Left = Most
significant bit,
byte, word Right = Least
significant bit,
byte, word
32 bit MD1
16 bit MW2 MW1
8 bit MB4 MB3 MB2 MB1
1 bit M32 to M25 M24 to M17 M16 to M9 M8 to M1
32 bit MD2
16 bit MW4 MW3
8 bit MB8 MB7 MB6 MB5
1 bit M64 to M57 M56 to M49 M48 to M41 M40 to M33
TIP
The relevant marker values are transferred in Intel
format. In other words, the first byte is the low byte
(Byte 4) and the last byte the high byte.