FCM 300 / FCD 300 / VLT
®
2800 / DP V1 PROFIBUS
Profibus
DP
■ Object and data types supported by FCM
300, FCD 300 and VLT 2800
Data types supported by FCM 300, FCD 300 and
VLT 2800
Data
type
Object
code
Short
name
Description
3 5 12 Integer 16
55 Unsigned8
6 5 O2 Unsigned 16
7 5 O4 Unsigned 32
10 5 Byte string
13 5 Time difference
1)
33 5 N2 Standardized
value (16 bit)
1)
35 5 V2 Bit sequence
1)
1)
See elaboration below
Time difference
Thedatatypetimedifferenceisatime
indication in milliseconds.
Notation: Time d ifference
Value range: 0
i (2
32
-1) milliseconds
Coding: The time is presented as a binary
value of 32 bits (4 byte s). Thge
first four (MSB) bits are always
zero.
Tim e difference is thus a byte
string of 4 bytes.
Data coding of th e data type time difference
Bit Byte 1 Byte 2 Byte 3 Byte 4
80ms2
23
ms 2
15
ms 2
7
ms MSB
70ms2
22
ms 2
14
ms 2
6
ms MSB
60ms2
21
ms 2
13
ms 2
5
ms MSB
50ms2
20
ms 2
12
ms 2
4
ms MSB
42
27
ms 2
19
ms 2
11
ms 2
3
ms
32
26
ms 2
18
ms 2
10
ms 2
2
ms
22
25
ms 2
17
ms 2
9
ms 2
1
ms
12
24
ms 2
16
ms 2
8
ms 2
0
ms
Standardized value
A liniary value.
0% = 0 (0h), 100% is 2
14
(4000h)
Data type N 2
Range -200%...2000% -2
-14
Resolution 2
-14
=0.0061%
Length 2 bytes
Notation: 2’s complement notation.
MSB is 1st bit after sign bit in 1st byte.
Sign bit = 0 = positive number
Sign bit = 1 = nega tive number
Bit 8 7 6 5 4 3 2 1
Byte 1 SIGN 2
0
2
-1
2
-2
2
-3
2
-4
2
-5
2
-6
Byte 2 2
-7
2
-8
2
-9
2
-10
2
-11
2
-12
2
-13
2
-14
Bit seque nce
16 boolean values for control and presentation of user functions
.
Notation is binary
Bit 8 7 6 5 4 3 2 1
Byte 1 15 14 13 12 11 10 9 8
Byte 2 7 6 5 4 3 2 1 0
■ Spontaneous messages
The Spontaneous message is a ctivate d by the active
parameters i.e. 538, 540, or 953 and will be carried
with the PCV response, stating PNU and PVA of the
changed active parameter that triggered the message.
Spontaneous messages are generated w hen the value
is changed in one of the abovementioned parameters.
It means that a message will be sent when a warning
comes, and when a warning disappears.
Simultaneously the frequency converter will toggle the
SPM bit (11) of PCA word (see section PCA handling).
The Spontaneous messages will be transmitted
until the master has acknowledged reception of
the message by c h anging the SPM bit.
NB!:
Spontaneous messages are only active
when parameter 917 is "ON"!
Example of SPM execution
In the frequency converter the SPMs are temporarily
stored in a FIFO buffer. This means that up to 16
consecutive SPMs can be retained. If only one SPM
has entered the FIFO, the frequency converter will
resume normal communication as soon as the SPM has
been acknowledged by the master (and the condition
causing the SPM been rectified). If more SPMs are
in the FIFO, these will be transmitted consecutively
upon acknowledgement. If more SPMs are triggered
when the FIFO is full, these will be ignored.
MG.90.A5.02 - VLT is a registered Danfoss trademark
23
To Next Page
Loading...
Need help?
General
