Danfoss VLT Safety Option MCB 150 User Manual

8 Warnings and Alarms
8.1 Fault Types and Messages
This chapter provides troubleshooting tables for diagnosing fault conditions associated with the safety option.
The safety option differentiates between fatal error and alarm.
Table 23: Fault Types
Fault
type
Description Effect on the
system
Reset condition
Fatal er-
ror
Severe exceptional error caused by the program run in the
safety option. Cyclic program sequence is no longer possi-
ble for safety-related reasons. The last active function is
shown. The system is in stop mode.
Output S37 is
switched off
Reset possible by power cycling the
drive or restart the safety option via
parameter 42-90 Restart Safe Option.
Alarm Functional fault, caused by an external process. Both sys-
tems continue to run cyclically and serve all requests from
the communication interfaces. Sensing of the external
process is also maintained.
Output S37 is
switched off
Reset possible via parameterizable in-
put DI2, reset on LCP/DI or via field-
bus or via parameter 42-90 Restart
Safe Option.
Table 24: LED Status Indicators
Color Mode Description
Green Flashing System OK, configuration validated.
Green Permanent System OK, input or output activated.
Yellow Flashing System OK, configuration not yet validated.
Red Flashing Alarm.
Red Permanent Fatal error.
All external failures can be removed by giving a reset signal (via LCP, DI2a, and digital inputs on control card or via fieldbus depending
on configuration). All internal failures can be removed by power cycle, parameter 42-90 Restart Safe Option and configuration.
8.1.1 Messages
Any errors on the safety option are indicated on the drive display with different messages.
The following options are available for detailed diagnosis and fault detection:
• LEDs on the front of the safety option provide information on operating states. The LEDs are used to indicate the status of the
option, that is active safety functions, failures, and warnings, if any.
• LCP text or information via bus display the status of the safety functions (for example SS1a).
The following is shown in online mode in the MCT 10 Set-up Software:
• Status of the safety option input and output errors, messages, and the corresponding remedies are shown in the expanded
diagnosis system of the MCT 10 Set-up Software.
Warnings and Alarms
Installation Guide | VLT® Safety Option MCB 150/151
AQ279747441421en-000101 / 130R0292 | 81
Danfoss A/S © 2018.09

Danfoss VLT Safety Option MCB 150 Specifications

General

Brand	Danfoss
Model	VLT Safety Option MCB 150
Category	Control Unit
Language	English