Packet Structures; Ensuring Safe And Successful Control; Control Commands (Write Only) - Danfoss VLT Compact Starter MCD 201 Installation Manual

Packet Structures

7 Packet Structures
NOTICE
All references to registers refer to the registers within the
module unless otherwise stated.
NOTICE
Some soft starters do not support all functions.

7.1 Ensuring Safe and Successful Control

Data written to the Ethernet Module remains in its
registers until the data is overwritten or the module is
reinitialized. The Ethernet Module does not transfer
successive duplicate commands to the soft starter.

7.2 Control Commands (Write Only)

NOTICE
To operate reliably, only 1 bit in byte 0 may be set at a time. Set all other bits to 0.
Byte Bit Function
0 = Stop command.
0
1 = Start command.
0 = Enable start or stop command.
1
0 1 = Quick stop (coast to stop) and disable start command.
0 = Enable start or stop command.
2
1 = Reset command and disable start command.
3–7 Reserved.
0 = Use soft starter remote input to select motor set.
1 = Use primary motor when starting.
0–1
1
2 = Use secondary motor when starting.
3 = Reserved.
2–7 Reserved.
Table 7.1 Structures Used for Sending Control Commands to the Soft Starter
1) Ensure that the programmable input is not set to Motor set select before using this function.
MG17M202
Installation Guide
NOTICE
If the soft starter is started via fieldbus communications
but stopped via the LCP or a remote input, an identical
start command cannot be used to restart the soft starter.
To operate safely and successfully in an environment
where the soft starter may also be controlled via the LCP
or the remote inputs (and fieldbus communications), a
control command should be immediately followed by a
status query to confirm that the command has been
actioned.
1)
1)
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