F.12
SEL-734 Meter Instruction Manual Date Code 20090730
Modbus RTU Communications Protocol
Modbus RTU Communications Protocol
180 00B4 Reset Max/Min Metering Requires valid password
write. See Modbus Pass-
word Control and Parame-
ter Modification on
page F.9.
181 00B5 Reset Max/Min Crest Factor Metering Requires valid password
write. See Modbus Pass-
word Control and Parame-
ter Modification on
page F.9.
182 00B6 Reset (Peak) Demand Metering Requires valid password
write. See Modbus Pass-
word Control and Parame-
ter Modification on
page F.9.
183 00B7 Select Load Profile Recorder See Note 1 for LDP1 or
LDP2 selection.
184–255 00B8–00FF Reserved
Status
Elements
Each word resides in the Most Significant Byte of the register. See Meter Word specification for bit definition
(see Table 9.4 on page 9.5).
256 0100 Front-Panel LEDS, Row 0 BITMAP
257–303 0101–012F Row 1–Row 47 BITMAP
304–383 0130–017F Reserved
Communication Counters
This region contains counters for various communication errors or conditions.
384 0180 Number of messages received Number of messages
received
UINT
385 0181 Messages sent to other devices Number of messages sent
by the master not addressed
to the meter
UINT
386 0182 Invalid address Number or read request
messages with invalid re3ad
addresses received
UINT
387 0183 Bad CRC Number of messages
received with an invalid
CRC
UINT
388 0184 UART error Number of messages with
UART errors received
UINT
389 0185 Illegal Function code/Op code Number of messages with
illegal function codes
received (Does not incre-
ment with MV90 protocol)
UINT
390 0186 Illegal register Number of messages
received that request an
operation on an illegal regis-
ter
UINT
391 0187 Illegal write Number of invalid write
requests received
UINT
392 0188 Bad packet format Number of messages with
illegal size received (Does
not increment with MV90
protocol)
UINT
Table F.23 Modbus Register Map (Sheet 2 of 19)
Address Field Notes Min Max Conversion
Courtesy of NationalSwitchgear.com
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