Fault Management; Overview Of Faults - Danfoss MCB140 Original Operating Instructions

Monitoring module to protect individuals in the hazardous area of machinery and equipment
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6.5. Fault management

Any faults detected by the system are divided into 3 categories based on their significance and impact:
Fault category 0
Following debugging, it then automatically returns to normal operation and the outputs are enabled again in
accordance with the current system state.
In order to detect any sporadic faults, the fault code readout remains enabled until it is reset by pressing Enter.
Fault category 1
Following debugging and resetting by pressing Enter, it then returns to normal operation.
Fault category 2
In order to delete the saved faults once they have been debugged, the module must be disconnected from the
operating voltage for approx. 1 s. If a fault occurs which cannot be debugged by the user, then the module must be
sent back to the manufacturer in order for it to be repaired.
Irrespective of the category, faults may only be reset if the drive is at a standstill.

6.6. Overview of faults

Category Number
0
1
0
2
0
3
1
4...6
1
7
1
8
1
9
2
10...11
2
12...13
2
14...15
2
16...17
2
18
2
19
1
20
1
21
1
22
1
23
1
24
2
25
1
26
2
27
1
28
1
29
1
30
30...43
2
44...55
Table 20: Overview of faults
Safety technology: MCB14x
Fault cause
SLS speed exceeded
SMS speed exceeded
Protective device open despite interlock in place
Crossover between input channels
Speed difference between channel 1 and channel 2 greater than 20%
Standstill at Pr_x and >4x zero speed at Pr_y
Pr_1 and Pr_2 disabled at standstill
Ramp output shorted or defective
STO_O output shorted or defective
ExC shorted or defective
SSO output shorted or defective
Outputs cannot be destaged or fed by 24V
Module temperature > 85°C
Contactor (auxiliary contact) does not open in the event ExC output is enabled
DOOR input disabled and 24 V at Door_1 or Door_2 terminals
SLS input disabled and 24 V at SLS_1 or SLS_2 terminals
P104 setting "single channel", but 24 V at SS1_1, SLS_1 or DOOR_1
P201 setting "single channel", but 24 V or pulses at Pr_1
Enter key permanently pressed
P106 setting "emergency", but 24 V at FBC terminal
Operating voltage < +21 V DC or > +28 VDC
SLS and/or DOOR actively parameterised without Motor Feedback (P201=0
Wire break in 2-wire initiator (P201=1-2dr)
No initiator pulses for P201=1-EnA after "start-up delay" (P204) has elapsed
Reserve
Internal faults
Document No.: MG34Y104
Rev.: 06
23 October 2012
Page 19 of 25

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