Schweitzer Engineering Laboratories SEL-787 - Table E.32 Modbus Register Map

E.22
SEL-787 Relay Instruction Manual Date Code 20081022
Modbus RTU Communications
Modbus Register Map
Reading History Data
Using Modbus
Through use of the Modbus Register Map (Table E.32), you can download a
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 1083. 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).
Instructi on Manual
Modbus Register Map
Table E.32 lists the data available in the Modbus interface and its description,
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.
Table E.32 Modbus Register Map
a
(Sheet 1 of 38)
Modbus Register
Address
b
Name / Enums Units Min Max Def
Scale
Fa c tor
DeviceNet
Parameter
Numbers
0(R) Reserved
c
01001
User Map Register
1 (R/W) USER REG #1 644 1249 684 1 101
•
•
•
125 (R/W) USER REG #125 644 1249 1249 1 225
User Map Reg Val
126–250 (R) USER REG#1 VAL–USER REG#125
VA L
0 65535 0 1 226–350
251–260 (R) Reserved
c
0 0 0 351–360
General Settings
261 (R/W) PHASE ROTATION 0 1 0 361
0=ABC
1=ACB
262 (R/W) RATED FREQ. Hz 0 1 1 362
0=50
1=60
263 (R/W) DATE FORMAT 0 2 0 363
0=MDY
1=YMD
2=DMY
264 (R/W) EVE MSG PTS EN 0 32 0 1 364
Group Selection
265 (R/W) GRP CHG DELAY sec 0 400 3 1 365