Danfoss VLT AutomationDrive FC 360 Programming Manual page 48

Application Examples
Example 1: conveyor application
The conveyor belt can accept to lose the communication
for up to 1 s. When communication is lost, the conveyor
has to stop.
ID
801 Control site
802 Control source
803 Control timeout time
804 Control timeout function
Table 7.7 Configuration of Example 1
7 7
Illustration 7.9 Example of Setting the Update Time and Number of Accepted Lost I/O Cycles
The PROFINET interface will issue the warning 34, 48
milliseconds after the communication is lost. The frequency
converter issues warning 17, if the communication is still
missing after 1.0 s. At this time the frequency converter
commands the motor to stop via the setting in
parameter 8-04 Control Timeout Function, the frequency
converter ramps the motor down to stop. When the
communication is re-established the frequency converter
removes the warning 17, and execute the last valid control
word it has received before timeout occurred. It is the PLC
programs responsibility to regain control of the motor by
sending an active control word with the desired command
to control the motor.
46
PROFINET
Name Set-up 1
Digital and control word
FC port
1.0
Stop
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The I/O controller is programmed so that it is sending the
CTW every 16 milliseconds, and that the I/O controller and
PROFINET interface allows up to 3 I/O cycles to be lost
before activating warnings, alarms, and so forth. For the
PROFINET interface, this means that it issues the warning
34 if it does not receive I/O data for more than 48
milliseconds.
Example 2: pump application
The pump can accept loss of communication for up to 3 s.
Relay 1 is controlled via bit 11 in the control word to
open/close a valve. When communication is lost, the pump
has to stop, and it may not restart before a reset on the
display or via the control word is activated. For the valve,
relay 1 has to go into "off" state and close the valve.
ID Name
540 Function Relay
801 Control site
802 Control source
803 Control timeout time
804 Control timeout function
Table 7.8 Configuration of Example 2
The I/O controller is programmed so that it is sending the
CTW every 64 milliseconds, and that the I/O controller and
PROFINET interface allows up to 6 I/O cycles to be lost
before activating warnings, alarms, and so forth. For the
PROFINET interface, this means that it issues the warning
34 if it does not receive I/O data for more than 384
milliseconds.
Set-up 1
Bus control, timeout: off
Digital and control word
Option A
3.0
Stop and trip
MG06G102