The use of limit switches can help protect against some hazards (for example, collision with mechanical stop caused by incorrect reference values).
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LOSS OF CONTROL |
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oEnsure that limit switches are installed as determined by your risk assessment. oVerify correct connection of the limit switches. oVerify that the limit switches are sufficiently distant from the mechanical end to allow an adequate stopping distance. oVerify correct parameterization and function of the limit switches. |
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Failure to follow these instructions can result in death, serious injury, or equipment damage. |
Movements can be monitored using limit switches. A positive limit switch and a negative limit switch can be used for monitoring.
If the positive or negative limit switch are tripped, the movement stops. An error message is generated and the operating state switches to 7 Quick Stop Active.
The error message can be reset by means of a “Fault Reset”. The operating state switches back to 6 Operation Enabled.
The movement can continue, however, only in the opposite direction. For example, if the positive limit switch was triggered, further movement is only possible in negative direction. In the case of further movement in positive direction, a new error message is generated and the operating state switches back to 7 Quick Stop Active.
The parameters IOsigLIMP and IOsigLIMN are used to set the type of limit switch.
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Parameter name HMI menu HMI name |
Description |
Unit Minimum value Factory setting Maximum value |
Data type R/W Persistent Expert |
Parameter address via fieldbus |
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Signal evaluation for positive limit switch. 0 / Inactive: Inactive 1 / Normally Closed: Normally closed NC 2 / Normally Open: Normally open NO Type: Unsigned decimal - 2 bytes Write access via Sercos: CP2, CP3, CP4 Setting can only be modified if power stage is disabled. Modified settings become effective the next time the power stage is enabled. |
- 0 1 2 |
UINT16 R/W per. - |
Modbus 1568 IDN P-0-3006.0.16 |
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Signal evaluation for negative limit switch. 0 / Inactive: Inactive 1 / Normally Closed: Normally closed NC 2 / Normally Open: Normally open NO Type: Unsigned decimal - 2 bytes Write access via Sercos: CP2, CP3, CP4 Setting can only be modified if power stage is disabled. Modified settings become effective the next time the power stage is enabled. |
- 0 1 2 |
UINT16 R/W per. - |
Modbus 1566 IDN P-0-3006.0.15 |
The signal input functions “Positive Limit Switch (LIMP)” and “Negative Limit Switch (LIMN)” must have been parameterized, see chapter Digital Inputs and Outputs.
