Vlt Response Time; General Purpose Discrete I/O; I/O Assembly Instances - Danfoss VLT 5000 Operating Instructions Manual

VLT Response Time

The update time via the DeviceNet connection
can be divided into two parts:
1. The communication time, which is the time it
takes to transmit data from the master to the
slave (VLT with DeviceNet option).
2. The internal update time, which is the time it takes
to transmit data between the VLT 5000 control
card and the DeviceNet option card.
Communication time (t
com
transmission speed (baudrate) and the type of master

General Purpose Discrete I/O

The General Purpose Discrete I/O device I/O
assemblies consist of:
• five predefined input assemblies with single
status bits
• one product–specific input assembly with
a single status bit

I/O Assembly Instances

The I/O Assembly Instance definitions in this section
define the format of the "data" attribute (attribute 3)
for I/O Assembly Instances. I/O Assemblies support
a hierarchy of motor control devices. The device
hierarchy includes motor starters, soft starters, AC
and DC drives, and servo drives. Assembly Instances
are numbered within the hierarchy so that each
device type is assigned a range of Assembly Instance
Parameter Decimal
904
PP03 20
PP01 100
PP02 101
PP04 102
MG.50.H4.02 - VLT is a registered Danfoss trademark
) depends on the actual
WRITE
CTW SPEED
RPM
CTW REF
CTW REF 915.1
915.1 915.2 915.3
®
VLT 5000/ 5000 FLUX/ 6000 HVAC/
8000 AQUA DeviceNet
in use. More data or lower transmission speed
will increase the communication time.
The internal update time (t
data in question as there are different channels for
the data transfer where time critical data e.g. control
word has highest priority. The internal update time for
the different types of data are stated below.
Data
Control word/Main reference (part of
PPO)
Status word/Actual output frequency
(part of PPO)
Parameter read via PCD-part of PPO
Parameter write via PCD-part of PPO
Parameter read/write via explicite
message
• five predefine input assemblies with multiple
status bits
• one product–specific input assembly with
multiple status bits
• five predefined output assemblies
• one product–specific output assembly
numbers, with higher functionality devices supporting
higher instance numbers. Devices in the hierarchy
can choose to support instance numbers that are
lower than theirs in the hierarchy. For example an AC
drive may choose to support some I/O Assemblies
in the starter profile to make it easier to interchange
starters and drives within the system.
Decimal
70 STW
150 STW
915.2 151 STW
915.4 152 916.1
) depends on the type of
int
Update
time, t
int
2 msec
2 msec
2 msec
83 msec
22 msec
READ
AC
REF
MAV
MAV 916.1 916.2
916.2 916.3 916.4
13