Siemens 7SR45 Argus User Manual page 89

The following table shows the fields in the time as they are returned.
Byte
0
Content ms L
5.2.8
STR32 and STR64
5.2.8.1 BITSTRING
A Bit-String (or Bit-Array) is a method of compactly storing a number of bits of data. In this
instance we store up to 16 bit values, for example the states of binary inputs, in a single 16 bit
register. The first bit value is stored in the Least Significant Bit (LSB) of the register. The 16th
value would be in the Most Significant Bit (MSB). Bit values can only be zero or one. Any
unused bits will be set to zero.
In this MODBUS implementation the 16 bit value is stored in a 16 bit register in Big-Endian
format. As an example, assume bits 1, 3, 9 and 12 are set. The binary representation of this
would be 0000100100000101
the register 30001, it would look as follows:
Address
30001
On reception this register should be interpreted as a 16 bit integer.
5.2.9
POINTS LIST
The information shown below is the default configuration. This can be modified using the
Communications Configuration Editor tool, refer section 9 for details.
5.2.9.1 Coils (Read Write Binary values)
Address
00001
00002
00003
00004
00100
00101
00102
00155
00156
00157
00158
00240
© 2018 Siemens Protection Devices Limited
1 2
ms H Mi
giving a hex representation of 0905h. Assume this is stored in
2
Value
0905
Description
Binary Output 1
Binary Output 2
Binary Output 3
Binary Output 4
LED Reset (Write only)
Settings Group 1
Settings Group 2
Remote mode
Service mode
Local mode
Local & Remote
Battery Data Reset (Write-Only)
Chapter 4 - 7SR45 Data Communications Definitions
3 4
Ho Da Mo
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Ye L Ye H
Chapter 4 Page 15 of 20