Modbus Register Map; Reading History Data Using Modbus; Table E.32 Modbus Register Map - Sel 751A Instruction Manual

E.26 Modbus RTU Communications

Modbus Register Map

Reading History Data
Using Modbus
Modbus Register Map

Table E.32 Modbus Register Map

Modbus Register
Address
0 (R)
User Map Register
1 (R/W) USER REG #1
125 (R/W) USER REG #125
User Map Register Values
126 (R)
250 (R)
Reserved Area 1
251–260 (R)
General Settings
261 (R/W) PHASE ROTATION
262 (R/W) RATED FREQ.
263 (R/W) DATE FORMAT
264 (R/W) EVE MSG PTS EN
Group Selection
265 (R/W) GRP CHG DELAY
SEL-751A Relay
Through use of the Modbus Register Map
complete history of the last five events via Modbus. The history contains the
date and time stamp, type of event that triggered the report, currents, and
voltages at the time of the event. Please refer to the Historical Data section in
the map.
To use Modbus to download history data, write the event number (1–5) to the
EVENT LOG SEL register at address 1747. Then read the history of the
specific event number you requested from the registers shown in the Historical
Data section of the Modbus Register Map
Table E.32
range, and scaling information. The table also shows the parameter number
for access using the DeviceNet interface. The DeviceNet parameter number is
obtained by adding 100 to the Modbus register address.
a
(Sheet 1 of 56)
Name/Enums
b
c
Reserved
•
•
•
USER REG#1 VAL
•
•
•
USER REG#125 VAL
c
Reserved
0 = ABC
1 = ACB
0 = 50 Hz
1 = 60 Hz
0 = MDY
1 = YMD
2 = DMY
0 = N, 1–32
Instruction Manual
lists the data available in the Modbus interface and its description,
Units Min
0
610
610
0
0
0
0
Hz 0
0
0
sec 0
(Table E.32), you can download a
(Table E.32).
DeviceNet
Scale
Max Default
Parameter
Factor
Numbers
100 1
1947 650 1
1947 1947 1
65535 0 1
65535 0 1
0 0 351–360
1 0
1 1 1
2 0 1
32 0 1
400 3 1
Date Code 20100129
101
225
226
350
361
362
363
364
365