Safe Fieldbus; Safe Torque Off (Sto) - Danfoss iC7 Series Operating Manual

Operating Guide | iC7-Automation Functional Safety

Safe Fieldbus

4.4.4
Table 20: General Functional Safety Parameters
(1)
Parameter name
Safe fieldbus address (A)
Safe fieldbus configuration (B)
1) Parameters are identified with letters in the Safety configuration section in MyDrive® Insight. The letter is given in parentheses after the parameter name for each parameter in this
table.

Safe Torque Off (STO)

4.4.5
The Safe Torque Off (STO) safety function allows the drive output to be disabled so that the drive cannot generate torque to the motor
shaft.
STO corresponds to an uncontrolled stop in accordance with stop category 0 of IEC 60204-1. The events that can activate the STO
function are:
An external request.
l
A violation of another safety function.
l
A fault detected by the internal diagnostics.
l
The drive always initiates in a safe state, which is cleared automatically after the startup is completed.
When parameter Restart behavior for release of STO is configured to require an acknowledgment, acknowledgment is
l
required also when the device is powered up, and not only when a safety function has been disengaged.
Table 21: STO Parameters
(1)
Parameter name
Activation configuration (A)
Restart behavior for release of
STO (B)
Digital input assignment for
STO restart acknowledge (C)
Danfoss A/S © 2024.08
Selections
1–65535
FALSE/TRUE
(Checkbox Enablednot ticked/
ticked).
NOTICE
Selections
De-energized (Function always
on)
Safe Input (X31/X32)
Energized (Function always
off )
Direct restart
Nonsafe Acknowledge re-
quired
Safe Acknowledge required
Not selected
Safe Input (X31/X32)
Functional Safety for Frequency Converters, Upgradable (+BEF2)
Default value
1
FALSE
(Checkbox Enabled not ticked.)
Default value
Safe Input (X31/X32)
Direct restart
Not selected
AQ319741840653en-000401 / 136R0268 |
Description
The address of the device in
the safe fieldbus subsystem.
Specifies if safe fieldbus is en-
abled.
Description
Specifies the safe digital input,
which can be associated to the
activation of the safety func-
tion.
Specifies the restart behavior
for STO.
Specifies the safe digital input,
which can be associated to the
STO restart acknowledgment.
33