Parameters/address space
4.9 Safety functions
ET 200SP F-TM Count 1x1Vpp sin/cos HF (6ES7136-6CB00-0CA0)
56 Equipment Manual, V1.0, 01/2021, A5E47073911-AA
Examples of how the function can be used
The machine operator must be able to enter the
machine after the protective door has been opened
and slowly move a horizontal conveyor with an
acknowledgment button in the danger zone.
• Enable SLS in the counter via your safety
program in the F-CPU.
• The counter monitors the velocity of the
A spindle drive, depending on the selection of the
cutting tool, must not exceed a specific maximum
• Enable SLS in the counter via your safety
program in the F-CPU.
4.9.2.2 Configuring SLS
In STEP 7 do the following to configure SLS:
• Configure the "Measured Value" to be "Velocity" and specify the desired values for the
following:
– "Update time"
– "Time base for velocity measurement"
– "Counts per unit for velocity measurement"
• Configure "Safety Function - Limited Speed"
• Configure the "Speed limit"
• Download this project to the F-CPU
SLS speed can only be configured if the measured value is set to velocity.
4.9.2.3 Enabling SLS
In your safety program, set the "Enable Safe Speed" bit to 1 to begin SLS monitoring.
From that point, if the module ever detects a speed in either direction that exceeds the
configured "Speed limit", the "Safe Speed Event" bit is set to 1.
4.9.2.4 Responding to SLS
Your safety program examines the "Safe Speed Event" bit and takes appropriate action when
the bit is seen as 1. Once set, the "Safe Speed Event" bit remains set until either of the
following actions occur:
• Your safety program sets the "Reset Safe Speed" bit to 1
• A power cycle
• A new STEP 7 hardware configuration is downloaded
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