ProSoft Technology 5201-DFNT-104C - Manual (Page 62)

IEC-60870-5-104 Protocol Implementation 104C Version 3 ♦ ProLinx Gateway
Protocol Manual IEC 60870-5-104 Client (Firmware v3.xx)
Page 62 of 139 ProSoft Technology, Inc.
August 4, 2011
C_SE_NA and C_SE_NB
The Control Normalized Value Set Point Command information object and the
Control Scaled Value Set Point Command information object use one word with
word addressing. For example, if you configured the following information
objects:
The following table describes how these information objects would be used.
Inf. Object Address Module Database Address
1100 Word 2000 (Word address 2000)
The Control Normalized Measured information objects use a data representation
defined by the protocol specification to represent fractional decimal values. The
following table describes the value for each bit as a reciprocal power of two (2),
that is two (2) raised to the power of a negative exponent (-1 through -15). Bit 15
is the Sign Bit.
Bit 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Value
Hex(h)
Decimal
Sign
4000h
2
-1
2000h
2
-2
1000h
2
-3
800
h
2
-4
400
h
2
-5
200
h
2
-6
100
h
2
-7
80
h
2
-8
40
h
2
-9
20
h
2
-10
10
h
2
-11
8h
2
-12
4h
2
-13
2h
2
-14
1h
2
-15
4000h
0.5
0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0
2000h
0.25
0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0
1000h
0.125
0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0
6000h
0.75
0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0
3210h
0.395751953125
0 0 1 1 0 0 1 0 0 0 0 1 0 0 0 0