High true or low true logic – Rockwell Automation 2706 DL40 HARDWARE USER MANUAL User Manual
Page 63
Chapter 6
Other Operating Modes
6 – 17
Where the Strobe Lines Mnemonic is an abbreviation for the state of the four
strobe lines MS0, MS1, MS2, MS3. The interpretation of these lines is
dependent on the Run Mode selected by the user with the Offline
Programmer Software.
The Data Lines State will be a pattern of sixteen 1s and 0s indicating the
voltage state of the data inputs D0–D15.
Voltage Range
High True Logic
Low True Logic
0 – 0.8 VDC
0 (OFF)
1 (ON)
0.8 – 3.5 VDC
Indeterminate
Indeterminate
3.5 – 25 VDC
1 (ON)
0 (OFF)
You select the type of logic to use when programming the DL40 with the
Offline Programmer Software.
The Strobe Lines Mnemonic will occupy the first three positions of the
display (starting from the left). This will be followed by a space character
and then the state of D15, D14, D13 and so on until the state of D0 which
will be in the far right position of the display. The following table shows the
mnemonics that will be displayed for the strobe lines for different Run
Modes.
High True or Low True Logic
Run Mode
MS3
MS2
MSl
MS0
Mnemonic
Msg/Var/Slave
0
0
0
0
NUL
0
0
0
1
MSG
0
0
1
0
SLV
0
0
1
1
SGN
1
0
0
0
D1 (Variable 1)
1
0
0
1
D2 (Variable 2)
1
0
1
0
D3 (Variable 3)
1
0
1
1
D4 (Variable 4)
1
1
0
0
D5 (Variable 5)
1
1
0
1
D6 (Variable 6)
1
1
1
0
D7 (Variable 7)
1
1
1
1
D8 (Variable 8)
0
1
1
0
D9 (Variable 9)
0
1
1
1
D10(Variable 10)
0
1
0
0
NV(Not Valid)
0
1
0
1
INV(Invalid)
Message List
➀
X
X
0
0
NUL
X
X
0
1
PRl
X
X
1
0
ADD
X
X
1
1
DEL
➀
x = Ignored