Toshiba MBP-100 Manual De Usuario

 

  

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• 

The number in the top portion of the MSTR block is the address of the first 
of six registers in the Control Block, and is generally configured as 
indicated in Table 7. 

4x 

Identifies which MSTR function is to be 
executed.  The MBP-100 supports 
read, write, global read, and global 
write. 

1 = Write Registers 
2 = Read Registers 
5 = Write Global Data 
6 = Read Global Data 

4x + 1 

Error code (Hex) 

Read Only 

4x + 2 

Number of consecutive registers to 
read or write (n) 

1 <= n <= # data registers 

4x + 3 

Starting register (s) 

1 <= s <= (65535-n) 

4x + 4 

Destination node address 

2 – 64 

4x + 5 

Master node address 

1 

 

There are small differences in the Control Block configuration depending 
on the selected MSTR function and whether or not network elements such 
as routers exist.  Specific examples of each MSTR function can be found in 
sections 16.3 through 16.6.  These examples assume a single network 
segment (no routers). 

 
• 

The number in the middle portion of the MSTR block is the address of the 
first register in the Data Area.  For write functions, the Data Area is the 
location of the source (write) data.  For read functions, the Data Area is the 
destination of the returned read data. 

 
• 

The number in the bottom portion of the MSTR block is the Number of 
Data Registers.  This number defines the maximum number of registers in 
the data area. Register “4x + 2” in the Control Block must be less than or 
equal to this number.  Also, each individual MSTR function has a maximum 
value for this number, which is discussed in sections 16.3 through 16.6.