ProSoft Technology MVI46-103M - Manual (Page 18)

MVI46-103M ♦ SLC Platform Functional Overview
IEC 60870-5-103 Master Communication Module
Page 18 of 187 ProSoft Technology, Inc.
September 12, 2006
lists the data types supported by the module and their associated storage
representation:
Type
ID Description Data Representation
1 Time-tagged messages with each data
point represented by two bits. Dual-bit status (7.2.6.5 with 00b
(0 decimal) = not used
01b (1 decimal) = Off,
10b (2 decimal) = On and
11b (3 decimal) = not used
2 Time-tagged messages with relative time
with each point represented by two bits. Dual-bit status (7.2.6.5 with 00b
(0 decimal) = not used
01b (1 decimal) = Off,
10b (2 decimal) = On and
11b (3 decimal) = not used
3 Measurands with quality descriptor. The
lower 3 bits of the values represented in
this data type contain status information.
The upper 13 bits of the value contained a
signed, 12-bit number. This data type will
return from 1 to 4 values. The number of
words received is dependant on the
information object number and the slave
device. Measurand with quality descriptor (7.2.6.8)
Bit 0: 0 = No overflow, 1 = Overflow
Bit 1: 0 = Valid, 1 = Invalid
Bit 2: Reserved
Bits 3-25: Value from –1..+1-2
12
4 Time-tagged measurands with relative time
with the value in the packet represented by
a single floating point number.* Short floating-point number stored in IEEE
STD 754 format (Fraction, Exponent, Sign)
(7.2.6.20)
5 Identification data composed of 12
characters of data. Each point in defined of
this data type should reserve 12 bytes (6-
word addresses) in the database for the
data received. Byte data as defined in 7.2.6.2. First 8
bytes are characters 1 to 8 and last 4
bytes are manufacture bytes either
decimal (0-255) or as ASCII characters.
9 Measurands with quality descriptor. The
lower 3 bits of the values represented in
this data type contain status information.
The upper 13 bits of the value contained a
signed, 12-bit number. This data type will
return from 1 to 9 values (some slaves
may return up to 16 values). The number
of words received is dependant on the
information object number and the slave
device. Measurand with quality descriptor (7.2.6.8)
Bit 0: 0 = No overflow, 1 = Overflow
Bit 1: 0 = Valid, 1 = Invalid
Bit 2: Reserved
Bits 3-25: Value from –1..+1-2
12
20 General command to control a dual-point
object. Each command issued by the
module uses the values of two adjacent
bits in the database or an override value
specified by the user command. Dual-bit status (7.2.6.4 with 00b
(0 decimal) = not used
01b (1 decimal) = Off,
10b (2 decimal) = On and
11b (3 decimal) = not used
* The words should be swapped in the ladder logic.