User-Defined Modbus Data Region; Reading Event Data Using Modbus - Siemens SIMPRO-100 Instruction Manual

C
™
Modbus RTU Communications Protocol
C.15 User-Defined
Modbus Data Region
The SIMPRO-100 Relay Modbus Register Map
defines an area of 125 contiguous addresses
whose contents are defined by 125 user settable
addresses. This feature allows you to take 125
discrete values from anywhere in the Modbus
Register Map and place them in contiguous
registers that you can then read in a single
command. The SIMPRO-PC software provides a
convenient method to define the User Map
Addresses, download the configuration to a
particular relay, and store the configuration for
use with other relays.
To apply the user-defined data region, follow the
steps listed below:
1. Define the list of desired quantities (up to
125). Arrange the quantities in any order that
is convenient for you to use.
2. Refer to Table C.19 on page 187, and list the
address of each quantity.
3. Set the SIMPRO-100 Relay User Map
Addresses (00D0h – 014Ch) equal to the
addresses of the desired quantities using the
SIMPRO-PC software and a PC connected to
the front-panel serial port.
4. Use Modbus Function Code 03h or 04h to
read the desired quantities from addresses
0050h – 00CCh (User Map Values) at the
rear-panel EIA-485 port.
168
C.16 Reading Event Data
Using Modbus
The Modbus Register Map provides a feature that
allows you to download complete event data via
Modbus. The SIMPRO-100 Relay stores the
latest 14 full-length event reports in nonvolatile
memory. Chapter 9, page 117 contains a
complete description of the event data.
Download event summary data by writing an
event number to 0371h, then reading the desired
data from addresses 0372h through 0395h.
To download analog event data using Modbus,
you need to select both the event number (write
to 03A1h) and the analog channel number (write
to 03A92h), then read the 4-sample per cycle
event data from addresses 03A3h through
03DEh. Table C.18 shows the channel
assignments.
Set 0392h
Equal To
1 IA
2 IB
3 IC
4 IG
5 IN
6 VA
7 VB
8 VC
9 Relay Word Rows 1 & 2
10 Relay Word Rows 3 & 4
11 Relay Word Rows 5 & 6
12 Relay Word Rows 7 & 8
13 Relay Word Rows 9 & 10
14 Relay Word Row 11 & reserved
Table C.18 Assign Event Report Channel Using
Address 0392h
SIMPRO-100
To Read Data
From Channel
PRIM-2400C