Milltronics ACCUMASS BW500, Инструкция по эксплуатации

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PL-565 Accumass BW500 Page 125
Communic
a
tions
Modbus Register Map (cont’d)
Format (R40,062)
This value determines the format of all unsigned, double-register integers (UINT32),
except for those in the direct parameter access .
0 indicates that the most significant byte (MSB) is given first
1 indicates that the least significant byte (LSB) is given first
For more information on this data format see page 131
Device Identifier (R40,064)
This value identifies the Milltronics device type and is “2” for the BW500.
Handshaking Area (Parameter Access)
Built into BW500 is an advanced handshaking area that can be used to read and
write 32 bit parameters.
Mapping
Parameter Read and Write (40,090 – 40,095) is a series of six registers that are used
for reading and writing parameter values to and from the BW500. The first three
registers are always unsigned integers representing parameters and index values.
The second three registers are the format and value(s) of the parameter.
All parameters normally accessed through the hand-held programmer are available
through these registers.
Address Description
40,090 Parameter (integer)
40,091 Primary Index (integer)
40,092 Secondary Index (integer)
40,093 Format word (bit mapped)
40,094 Read value, word 1
40,095 Read value, word 2
40,096 Write value, word 1
40,097 Write value, word 2
Reading Parameters
To read parameters through Modbus follow these steps:
1. Send the parameter, its primary index, and its secondary index (usually 0) and format
to registers 40,090, to 40,093.
2. Wait until you can read the above values from the registers (40,090 to 40,093).
3. Read the value from registers 40,094 and 40,095.