ProSoft Technology MVI69-103M - Manual (Page 76)

MVI69-103M ♦ CompactLogix or MicroLogix Platform Reference
IEC 60870-5-103 Master Communication Module
Page 76 of 131 ProSoft Technology, Inc.
November 3, 2008
Type ID Description Data Representation
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 to 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 to 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 to 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.
As shown in the previous table, all bit types are addressed as bits in the modules
database.
Addressing the Data Types
The following table shows an example of how to address the data types in the
MVI69-103M:
Data Type Address Type Length Example
1 Bit 2 bits Address 160 refers to first and second bits from
word 10.
2 Bit 2 bits Address 160 refers to first and second bits from
word 10.
3 Word 4 words Address 50 refers to word 50, 51, 52, and 53.
4 Double-word 2 words Address 40 refers to two consecutive words
starting at word 80.
5 Bit 12 bits Address 180 refers to 12 consecutive bits starting
at the LSB of word 90.