Seneca Z-KEY User Manual page 54

USER MANUAL – Z-KEY
Data Type
Select the TAG variable type from:
16 BITS UNSIGNED: 1 modbus register, from 0 to 65535
16 BITS SIGNED: 1 modbus register, from -32768 to +32767
32 BITS UNSIGNED MSW : 2 modbus registers with the lower address Modbus register that hold the Most
Significant Word, from 0 to 4294967295
32 BITS UNSIGNED LSW : 2 modbus registers with the lower address Modbus register that hold the Less
Significant Word, from 0 to 4294967295
32 BITS SIGNED MSW : 2 modbus registers with the lower address Modbus register that hold the Most
Significant Word, from -2147483648 to +2147483647
32 BITS SIGNED LSW : 2 modbus registers with the lower address Modbus register that hold the Less
Significant Word, from -2147483648 to +2147483647
FLOAT MSW : 2 modbus registers with the lower address Modbus register that hold the Most Significant
Word, Floating point single precision (IEEE 758-2008)
FLOAT LSW : 2 modbus registers with the lower address Modbus register that hold the Less Significant
Word, Floating point single precision (IEEE 758-2008)
BIT : 1 Boolean coil or Discrete input register
this field is automatically filled if you have select a Seneca Device into the "Device" field.
WARNING!
All 32 bits values are stored into 2 consecutive registers, for example:
TAG Totalizer 1 in unsigned 32 bits MSW type is stored into registers 40016 and 40017:
The most significant word is the register 40016, the less significant word is the 40017.
������������������1=������(40017)+(������(40016)×2 )=
So the 32bits value is obtained by the following relation:
16
������(40017)+(������(40016)×65536)
The Tags setup can be imported/exported from/to a ".cgi" file:
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