Endress+Hauser WirelessHART Fieldgate SWG70, Руководство по эксплуатации

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WirelessHART Fieldgate SWG70 Engineering
E Hauser 71
10.3.2 Input Status
Input Status allows the Modbus mapping of a device with single or multiple binary inputs.
As Fieldgate SWG70 supports extended registers, values are normally assigned to the regis-
ters with the reference addresses 100001 to 165536. The reference addresses are obtained
by adding the register number to 100,000. The dialog checks for completeness of entries
(line turns red if not correctly filled out) as well as double assignment to the registers (line
turns yellow).
The algorithm assumes that the discrete device delivers a maximum of 256 packed discrete
values, each comprising 16 bits of an unsigned Integer16 (UINT16). Each bit represents a
unique input status. Fieldgate first splits the data into two bytes. and reserves 8 registers for
each byte, i.e. one for each bit contained.
• Least significant byte (Bits 0 - 7) maps e.g. to registers 100001 - 100008
• Most significant byte (Bits 8 - 15) maps e.g. to registers 100009 - 100016
The value entered after the byte selection determines which of the packed discrete values is
to be mapped, e.g. 0 will map the first set of packed discrete values and 15 the sixteenth set
of packed discrete values. More information is to be found in Appendix 16.2.2.
NOTICE!
• Some HART devices map their binary values and status as PV in HART CMD 3. In this case
the value and status information will be found in the appropriate Input or Holding
Register. See Chapter 10.3.3 "Input Register" on page 75.
• If a device status is mapped as UINT8 in the input status register, the status will only be
found in one of the bit registers, e.g. in bit 0. The UINT8 is stored as a 16-bit value, the
MSB is populated with "0", see Appendix 16.1.3.
1. Click on Engineering => Modbus Mapping => Input Status to open the dialog:
2. Click on Generate to open the Generate tab.