Siemens SIMATIC TD 200, Руководство пользователя

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D-7
SIMATIC TD 200 Operator Interface
C79000-G7076-C272-01
Byte 0
Byte 1
Byte 2
Byte 3
Byte 4
Byte 5
Byte 6
Byte 7
Byte 8
Byte 9
Message 1 - Priority 1 - (Highest)
7 6 5 4 3 2 1 0
9 10 11 12 13 14 15 16
17
25
33
41
49
57
65
73
18
26
34
42
50
58
66
74
19
27
35
43
51
59
67
75
20
28
36
44
52
60
68
76
21
29
37
45
53
61
69
77
22
30
38
46
54
62
70
78
23
31
39
47
55
63
71
79
24
32
40
48
56
64
72
80
MSB LSB
1 2 3 4 5 6 7 8
Message 80 - Priority 80 - (Lowest)
Figure D-5 Message-Enable Bits for up to 80 Messages
M Area Address Byte 5
You must reserve eight internal memory bits (M bits) for the TD 200 to use when a
function key is pressed. Your program can inspect these bits and take the
appropriate action when a key is pressed. One M bit is set by the TD 200 each
time the corresponding function key is pressed.
Note
The TD 200 does not automatically reset the function key M bits after they are set.
If you use these bits within your program, you must then reset them from within
your program.
Byte 5 of the TD 200 parameter block defines the address of the byte of M bits.
Valid address values for specific CPUs are defined in the
SIMATIC S7-200
Programmable Controller System Manual.
Figure D-6 shows a referenced byte (MBn) and shows which bit of the byte is set
by each function key.
!
Warning
The TD 200 sets an M bit each time a function key is pressed. If you do not intend
to use function keys, and therefore do not assign an M byte address for function
keys, the TD 200 defaults to byte M0 for the function keys. If your program uses
bits in M0, and a user presses any function key, the TD 200 sets the
corresponding bit in M0, overwriting the value assigned to that bit by your
program.
Inadvertent changes to M bits could cause your program to behave unexpectedly.
Unpredictable controller operation could cause death or serious injury to
personnel, and/or damage to equipment.
Always reserve an M area address, even when your program does not utilize
function keys.
TD 200 Parameters and Messages