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4.4.9 Functions, Alarms, and Warnings
Table 2: Overview of Functions, Alarms, and Warnings
Function
Number PTC
Relay
Description
No function
[0]
–
–
No function.
Safe stop alarm
[1]*
–
Safe stop [A68]
(1)
Coasts the drive when Safe Torque Off is activated. Manual
reset from LCP, digital input, or fieldbus.
Safe stop warn-
ing
[3]
–
Safe stop
[W68]W = warn-
ing
Coasts the drive when Safe Torque Off is activated (terminal
37 off). When Safe Torque Off circuit is re-established, the
drive continues without manual reset.
PTC 1 alarm
[4]
PTC 1 safe stop
[A71]
–
Coasts the drive when Safe Torque Off is activated. Manual
reset from LCP, digital input, or fieldbus.
PTC 1 Warning
[5]
PTC 1 safe stop
[W1]
–
Coasts the drive when Safe Torque Off is activated (terminal
37 off). When Safe Torque Off circuit is re-established, the
drive continues without manual reset, unless a digital input
set to
[80] PTC Card 1
is still enabled.
PTC 1 & Relay A
[6]
PTC 1 safe stop
[A71]
Safe stop [A68]
This option is used when the PTC option gates with a stop
button through a safety relay to terminal 37. Coasts the drive
when Safe Torque Off is activated. Manual reset from LCP,
digital input, or fieldbus.
PTC 1 & Relay W
[7]
PTC 1 safe stop
[W71]
Safe stop [W68]
This option is used when the PTC option gates with a stop
button through a safety relay to terminal 37. Coasts the drive
when Safe Torque Off is activated (terminal 37 off). When
Safe Torque Off circuit is re-established, the drive continues
without manual reset, unless a digital input set to
[80] PTC
Card 1
is still enabled.
PTC 1 & Relay
[8]
PTC 1 safe stop
[A71]
Safe stop [W68]
This option makes it possible to use a combination of alarm
and warning.
PTC 1 & Relay
W/A
[9]
PTC 1 safe stop
[W71]
Safe stop [A68]
This option makes it possible to use a combination of alarm
and warning.
A dangerous failure related to Safe Torque Off issues
alarm 72, Dangerous failure
.
1
A = alarm, W = warning. For further information, see the section
Alarms and Warnings
in the drive-specific operating guide or design guide.
AQ267038105120en-000101 / 130R0104 | 23
Danfoss A/S © 2022.08
Commissioning
VLT® PTC Thermistor Card MCB 112
Operating Guide