Yokogawa JUXTA VJ Series Limit Alarms - Manual (Page 43)

<5. MODBUS Communication >
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IM 77J01J11-01E 3rd Edition : Oct. 15, 2007-00
5.1.2 Specifying D Registers
Specification of D registers using commercially available SCADA or other software
and specification of D registers for messages used in a customer-created communi-
cation program are different. Take note of this.
1) When using commercially available SCADA or other software, specify a "reference
number" in which "D," the first character of a D register number, is replaced by "4."
2) For a customer-created communication program, specify a value in hexadecimal that
is obtained by subtracting 40001 from a reference number.
Example: Specifying a value (alarm 1 (D0014))
1) For messages when using commercially available SCADA or other software, specify
the reference number "40014."
2) For messages in the customer-created communication program, specify "000D," the
hexadecimal number of value 13 obtained by subtracting 40001 from the reference
number.