Siemens SIMATIC TD 200, Руководство пользователя

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D-3
SIMATIC TD 200 Operator Interface
C79000-G7076-C272-01
The default location of the parameter block is VW0, but you can store the
parameter block (or the offset to the parameter block) in any V memory location
between VW0 and VW999. (Use the Setup menu to change the default location of
the parameter block. See Section 3.8.) If you change the location of the parameter
block, the TD 200 looks to that location for either the parameter block or the offset
to the parameter block.
If the parameter block identifier cannot be found, the error message
NO PARAMETER BLOCK
is displayed. The TD 200 continues to monitor VW0 (or
the V memory location entered by means of the Setup menu) for either a valid
parameter block ID or an offset to a parameter block with a valid parameter block
ID.
Note
The TD 200 defaults to address 1 and attempts to communicate to a CPU at
address 2. See Section 3.8 to change the network addresses if other addresses
are used.
Description of the Parameter Block Format
The parameter block consists of 10 or 12 bytes of memory which define the modes
of operation and point to the location in CPU memory where the actual messages
are stored, as shown in Figure D-2. When you power up the TD 200, it looks for a
parameter block identifier in the CPU at VW0, either the ASCII characters “TD” or
an offset to the parameter block location, and it reads the data contained in the
block.
Byte 0 Byte 1 Byte 2 Byte 3 Byte 4 Byte 5 Byte 6 Byte 7 Byte 8 Byte 9
Parameter
Block ID
TD 200
Configuration
No. of
Msgs. M Area
Address
Message
Address
Language Display
Update Rate
Display Mode:
20 or 40 characters per message
Disable/Enable Force Function
Disable/Enable Time-of-Day Clock Menu
CPU Memory
“T” “D”
Select Bar Graph
characters
Disable/Enable Edit Password (stored in bytes 10 and 11 of
extended parameter block)
Points to messages
B L L L U U U U C P T F D
Byte 10 Byte 11
7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0
Byte 12 Byte 13
Character
Set
(optional)
Disable/Enable alternate character sets selected in bytes 12 and 13 of
extended parameter block.
Password
(optional)
Message
Enable
Address
Figure D-2 TD 200 Parameter Block
TD 200 Parameters and Messages