Application Examples; Example: Working With Instance 101/151 Process - Danfoss VLT DeviceNet MCA 104 Programming Manual

Application Examples

7 Application Examples
7.1 Example: Working with Instance
101/151 Process
This example shows how to work with I/O instance
101/151, which consists of control word/status word and
reference/main actual value. The instance 101/151 also has
2 extra words, which can be programmed to monitor
process signals, as shown in Illustration 7.1.
DeviceNet master
7 7
Sensor
Reversing
Illustration 7.1 Instance 101/151 Process
The application requires monitoring of the motor torque
and digital input, so PCD 3 is set up to read the actual
motor torque. PCD 4 is set up to monitor the state of an
external sensor via the process signal digital input. The
sensor is connected to digital input 18.
An external device is also controlled via control word bit
11 and the built-in relay of the frequency converter.
Reversing is permitted only when the reversing bit 15 in
the control word and the digital input 19 are set to high.
For safety reasons the frequency converter stops the motor
when:
•
The DeviceNet cable is broken.
•
The master has a system failure.
•
The PLC is in stop mode.
38
VLT
DeviceNet
Relay 04–05
N
230 V AC
19
18 20
0–24 V DC
Danfoss A/S © 12/2015 All rights reserved.
®
DeviceNet MCA 104
Parameter
Parameter 4-10 Motor
Speed Direction
Parameter 5-10 Termin
al 18 Digital Input
Parameter 5-11 Termin
al 19 Digital Input
Parameter 5-40 Functio
n Relay
Parameter 8-03 Control
Word Timeout Time
Parameter 8-04 Control
Word Timeout Function
Parameter 8-10 Control
Word Profile
Parameter 8-50 Coastin
g Select
Parameter 8-51 Quick
Ext. Device
Stop Select
Parameter 8-52 DC
Brake Select
Parameter 8-53 Start
Select
Parameter 8-54 Reversi
ng Select
Parameter 8-55 Set-up
Select
Parameter 8-56 Preset
Reference Select
Parameter 10-01 Baud
Rate Select
Parameter 10-02 MAC
ID
Parameter 10-10 Proces
s Data Type Selection
Parameter 10-12 Proces
s Data Config Read
Table 7.1 Function and Setting of the Parameters
Function Setting
Motor speed range/ [2] Both
direction directions
Digital input 18 [0] No operation
Digital input 19 [10] Reversing
Function relay [36] Control word
bit 11
[37] Control word
bit 12
Control word timeout 1.0 s
time
Control word timeout [2] Stop
function
Control word profile FC Profile
Coasting select [1] Bus
Quick-stop select [1] Bus
DC-brake select [1] Bus
Start select [1] Bus
Reversing select [2] Logic AND
Set-up select [1] Bus
Preset reference [1] Bus
select
Baud rate select Set to match
other DeviceNet
stations
MAC ID Set desired
station address
Process data type [1] Instance
selection 101/151
Process Data Config PCD 3: Torque
Read PCD 4: Digital
input
MG92F102