Ssm - Safe Speed Monitor; Introduction To The Ssm Function - Danfoss Vacon OPTEA Operating Manual

VACON® NXP Advanced Safety Options
Operating Guide
Logical level
SSR Request
Speed
SSR Max Limit
SSR Min Limit
SSR Active
SSR Reached
SQS Active
& STO Active
SQS Reached
& STO Reached
Reset
Illustration 62: The SSR Signals in a Violation Case. The SQS-STO Function as a Violation Response.

6.3.5 SSM - Safe Speed Monitor

6.3.5.1 Introduction to the SSM Function

The Safe Speed Monitor (SSM) safety function provides a safe output for signaling if the motor speed is within the set limits. It is
possible to parameterize the maximum speed and the minimum speed.
The only response to the speed going outside the limits is the deactivation of the safe output. No other safety function is activated.
When the SSM function is set to "Always active", an acknowledgment is not necessary. When the SSM function is not "Always ac-
tive", the acknowledgment is used normally, as specified in chapter
The parameters of the SSM safety function are described in
Danfoss A/S © 2021.06
SSR td2
SSR t1
6.1.5.1 Acknowledgment of a Safety
8.11 SSM Parameters.
Safety Functions
t
Violation
t
t
t
t
t
t
Function.
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