Baumuller b maXX BM2500, Operating Manual

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Description of the Software Modules and Parameters
Parameter manual b maXX BM3000
Document no.: 5.12001.07
537
of 820
4
The conditions of the limit switches are checked for plausibility. If the limit switch statuses
return an overall status that is not logical, the error 905 "Error Limit Switch Monitoring" will
be generated.
The causes for that could be:
n
Both hardware limit switches are active at the same time.
n
Positive software limit switch and negative hardware limit switch are active at the
same time.
n
Negative software limit switch and positive hardware limit switch are active at the
same time.
Possible causes:
n
Software limit switches are set incorrectly, e.g. values for positive and negative limit
switches are switched.
n
Hardware limit switches are wired incorrectly.
n
Errors on the wiring for hardware limit switches.
Effect of Error 905 "Error Limit Switch Monitoring":
A parameterized error action is carried out. If the entry for error response is "no re-
sponse", the response will occur depending on the operating mode and without pulse
block, which means the current operating mode will remain active.
– Position target entry: Always stop including error message 905.
– Manual operation: Always stop including error message 905.
– Position control with synchr. position set value entry:

In the case of an error the error message 905 is only generated, if
Z
136.2
–
Mode
bit 4 = 1 (drive internal stop) or bit 5 = 0 (error message is activated). For further de-
tails, refer to
Z
136.2
–
.
– Speed control and speed set value 1:

In the case of an error the error message 905 is only generated, if
Z
110.2
–
Mode
bit 9 = 0 (error message is activated) . For further details, refer to
Z
110.2
–
.
However, before the error is reset, the wiring of the hardware limit switches and parame-
terization of the software limit switches must be checked.
121.3
Negative SW limit switch
This parameter limits the permitted traversing range with active software limit switch mon-
itoring in the negative direction (= negative output speed).
It indicates the lowest target position that can be approached in operating mode position
target entry.
7 ... 6 Reserved
8 1: At least one hardware limit switch is active
9 1: At least one software limit switch is active
15 … 10 Reserved
Bit Meaning