Siemens SIMATIC S5 - Page 189

I
Programming Instructions
R 02/92
I
9.6.4 Reading the Absolute Value (Actual Value)
I...
,.:.,.
.
.:.,.:
.
. .
.
To read and evaluate actual absolute values, parameterized tracks or initial and end setpoints, a
prompt for updating bytes 4,5, and 6 of the output register must be given.
Byte 4 must provide an L read prompt.
L = Read
~111 = Setpoint display
= Actual value display
Anf = Initial setpoint
End = End setpoint
VZ = Sign
7
7
15
—
23
31
6
3
6
14
22
30
*
321
B
321
11 10 9
19 18 17
27 26 25
Bit
Byte O
1
2
3
4
7654 3 21 0
NV IR
I
Anf= O
1.
Track No.
End= 1
0-31
I
Setpoint 10 1
!
S9tpoint 10
0
I
Sdpoint 10
3
I sebi~lo 2 I
-
0
i’
o
8
16
24
kiiiika
4 Absolute 10 1 Absolute 10 0
5 Absolute 10 3 Absolute 10 Z
When byte 4 is switched to the data bus, the following
bit patterns are ossible for prompting the absolute
P
values in the fol owing read cycle: Read the current
actual value of a channel via any track number.
For channel 1 track number O to 15 (any)
For channel 2 track number 16 to 31 (an )
Y
Example: Channel 2 (track number = 16
Note: Initial bit must be “O”.
5
Read Byte 7
N
SP Bit=O
Y
1
Write Byte 4
I
I
Read byte 7
Software-based deletion:
If the read bit = “1”, the actual value bit = “1” and the end bit = “1”, all
parameterized data is deleted. Even when the track identifier changes, no
interrunt is triaaered.
9 – 68
IP 241 Equipment Manual
@ SiemenS AG 1969, Order No.: 6ES5 998-0KD21
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com