K-Patents SeedMaster 2 - Manual (Page 86)

11 COMMUNICATION 86
86
Exponent:
Bit30..Bit23 the value is the exponent of the number+127. The range is -126…127
Mantissa : Bit22..Bit0 normalized, highest bit means ½, the next one ¼ and so on.
Value of the real number can be calculated using the formula below:
Value= (-1)*S * (1+Bit22*2
-1+Bit21
*2
-2+Bit20
*2
-3+…...+Bit0
*2
-23)
*2
Exponent-127
Remark: The -0 is „not a number”.
11.4 Register set
SeedMaster 2 can handle 2 crystallizers simultaneously.
There are dedicated “read” and “write” data tables for both crystallizers, using two identical register sets for
communication. One table (read only, or RO) stores measured and calculated data. The other table (read
and write, RW) serves for writing parameters or to input data into SeedMaster 2.
The register sets are identical, so the addresses can be calculated as follows:
Address= base address + offset address
SeedMaster 2 register set
Base addresses
(decimal)
Type Name
0 Crystallizer 1 Read only O1 RO
128 Crystallizer 1 Read-Write O1 RW
256 Crystallizer 2 Read only O2 RO
384 Crystallizer 2 Read-Write O2 RW
Offset address
(decimal)
Register name Type O1 RO O1 RW O2 RO O2 RW
0 Concentration (syrup, m. l.) Real 0 128 256 384
2 Temperature Real 2 130 258 386
4 Massecuite density Real 4 132 260 388
6 Massecuite solids content Real 6 134 262 390
8 Motor consumption Real 8 136 264 392
10 Crystal content (laboratory) Real 10 138 266 394
12 Level Real 12 140 268 396