Siemens 9410DC, Руководство пользователя, Страница: 58 / 172

9410 series Communications
Prerequisite Description
Modbus slave
devices All Modbus slave devices must be communicating and appropriately configured.
Protocol • Modbus mastering serial devices: the master’s serial port protocol must be set
to Modbus master.
• Modbus mastering Ethernet devices: the master must be communicating to the
slave devices over Ethernet port 502.
NOTE: Having more than one Modbus master on a serial Modbus network may
cause communication conflicts.
Mastered devices The Modbus master device must have the slave device information entered for
mastering.
Modbus map
Your meter’s default Modbus register information (map) is available for download from
www.usa.siemens.com/pds.
The Modbus register information includes:
• registers and mapped values
• formats and scaling
• additional details where applicable
NOTE: Your meter’s Modbus registers are specified differently than previous devices
using ION architecture. If you are configuring Modbus slave information on your meter,
confirm you are using the appropriate Modbus register addressing. Refer to your
meter’s Modbus map for more information.
Your meter has a fixed (static) register map which contains the most common metering
values. This map is defined by a series of Data Mapping modules, which also
determine the values shown on your device’s display and webpages. The Data
Mapping modules are named based on the type of information they map to Modbus:
Data Mapping module Description
Data Mapping Dmd Modules Maps kW, kVA and kVAR demand data such as kW
sd del (sliding demand kilowatts delivered) as well
as current demand such as I a sd (sliding demand
phase A current).
Data Mapping Egy Modules Maps kWh, kVAh and kVARh delivered and
received data, including conditional, quadrant and
incremental energies.
Data Mapping EN Modules Maps present interval EN50160 power quality
compliance data.
Data Mapping EN Prev Modules Maps previous interval EN50160 power quality
compliance data.
Data Mapping I/O Modules Maps input metering data, alarms, resets and reset
counts.
Data Mapping Meas Modules Maps measured data from the standard and high-
speed Power Meter module.
The Cfg Modbus Map Enable setup register may
exist in this module.
Data Mapping PQ Modules Maps power quality data such as Crest Factor, K
Factor and total harmonic distortion, including IEC
61000-4-30 power quality compliance data.
Data Mapping Stats Modules Maps statistical low, mean and high data values,
such as I a mean (phase A current average value).
Data Mapping TOU Modules Maps time-of-use (TOU) data, such as seasons,
rates, and per-season demand such as kW sd rec
A (sliding demand kilowatts received in season A).
58 7EN05-0336-01