Rockwell Automation 1760-DNET Pico DeviceNet Communications Module User Manual User Manual
Page 41
Publication 1760-UM003A-EN-P - September 2005
Direct Data Exchange with Pico/GFX (Polled I/O Connection) 5-5
0 = status ’0’ 1 = status ’1’
Explanation:
Value 14
hex
= 00010100
bin
:
Byte 0 must always contain this value if data are to be written to the
Pico/GFX basic unit via the 1760-DNET gateway.
Value 34
hex
= 00110100
bin
:
This value sets the Pico status from STOP to RUN. It is only
interpreted as command and therefore does not permit an additional
transfer of data. The index value 14
hex
must be used in this situation.
Value 44
hex
= 01000100
bin
:
This value sets the "Pico" status from RUN to STOP. It is also used only
as command and is therefore based on the same operating principle
as the RUN command.
Value 00
hex
= 00000000
bin
:
If this value is written to the control byte, the gateway overwrites the
R data with zero. This function is of interest only if a master is to be
set to STOP mode and as resultant measure transfers zero values to all
I/O in order to ensure safety state.
Table 5.14 Byte 0: Operating mode
Pico Operating Mode
Bit
7
6
5
4
3
2
1
0
Index for setting the
basic unit to safety
state
0
0
0
0
0
0
0
0
Index for transferring
valid data
0
0
0
1
0
1
0
0
RUN command
0
0
1
1
0
1
0
0
STOP command
0
1
0
0
0
1
0
0
TIP
Even if the I/O of a control relay can be assigned
directly to a specific memory area of the master
programmable controller, it is nonetheless important
to conform with the correct data structure format
(e.g.: input data byte 0 = 14hex).