Endress+Hauser EngyVolt RV15, Руководство по эксплуатации

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Appendix EngyVolt RV15
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11.4.12 Diagnostics
MODBUS Protocol code 08 provides a number of diagnostic sub-functions. Only the “Return Query
Data” sub-function (sub-function 0) is supported on EngyVolt devices.
Example:
The following query will send a diagnostic “return query data” query with the data elements set to
Hex(AA) and Hex(55) and will expect these to be returned in the response:
Field name Example (Hex)
Slave address 01
Function 08
Sub-function High 00
Sub-function Low 00
Data byte 1 AA
Data byte 2 55
Error check Low 5E
Error check High 94
Exactly one register of data (two bytes) must be sent with this function.
The following response indicates the correct reply to the query, i.e. the same bytes as the query.
Field name Example (Hex)
Slave address 01
Function 08
Sub-function High 00
Sub-function Low 00
Data byte 1 AA
Data byte 2 55
Error check Low 5E
Error check High 94
11.5 RS485 Implementation of Johnson Controls Metasys
These notes briefly explain Metasys and EngyVolt device integration. Use these notes with the
Metasys Technical Manual, which provides information on installing and commissioning Metasys
N2 Vendor devices.
11.5.1 Application details
The EngyVolt multifunctional electrical energy meter is an N2 Vendor device that connects directly
with the Metasys N2 Bus. This implementation assigns key electrical parameters to ADF points, each
with override capability.
Components requirements:
• EngyVolt device with RS485 card and N2 port available.
• N2 bus cable
Metasys release requirements
• Metasys Software Release 12.04 or later
• NCM-361-8 or Metasys Extended Architecture NAE35,NAE45,NAE55