Warnings And Alarms; Fault Types And Messages; Messages - Danfoss VLT Safety Option MCB 150 Installation Manual

Installation Guide | VLT® Safety Option MCB 150/151

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 Description
type
Fatal er- Severe exceptional error caused by the program run in the
ror 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.
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.
Table 24: LED Status Indicators
Color Mode
Green Flashing
Green Permanent
Yellow Flashing
Red Flashing
Red Permanent
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.
Danfoss A/S © 2018.09
Description
System OK, configuration validated.
System OK, input or output activated.
System OK, configuration not yet validated.
Alarm.
Fatal error.
Effect on the Reset condition
system
Output S37 is Reset possible by power cycling the
switched off drive or restart the safety option via
parameter 42-90 Restart Safe Option.
Output S37 is Reset possible via parameterizable in-
switched off put DI2, reset on LCP/DI or via field-
bus or via parameter 42-90 Restart
Safe Option.
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Warnings and Alarms