Closed-Loop Control With Optbm; Closed-Loop Control With Optbn; Speed Measurement; Safety Speed Sensors - Danfoss Vacon OPTEA Operating Manual

VACON® NXP Advanced Safety Options
Operating Guide

3.5.7 Closed-loop Control with OPTBM

The OPTBM board can be used to realize closed-loop control. To use closed-loop control with OPTBM, check that the OPTBM revi-
sion supports closed-loop control, and that the OPTBM board is installed in slot C.
When using closed-loop control with OPTBM, consider the following features or differences compared to the other encoder boards
used for closed-loop control.
• The value of Pulse/revolution (normally shown as P7.3.1.1) used for closed-loop control is copied from the parameterization of
the Advanced Safety Option. It cannot be edited independently.
• The parameter Reading Rate (shown as P7.3.1.3.1) can be edited normally.
• Parameter Invert Direction (normally shown as P7.3.1.2) is not supported or shown. Value "0 = No" is always used.
• Parameter Encoder Type (normally shown as P7.3.1.4) is not supported or shown. Value "1 = A, B = speed" is always used.
• The qualifier input ENC1Q is not included in OPTBM.
• The fast digital input DIC4 is not included in OPTBM.
• The encoder must use differential signals. Single-ended encoders are not supported.

3.5.8 Closed-loop Control with OPTBN

The OPTBN board can be used to realize closed-loop control. To use closed-loop control with OPTBN, check that the OPTBN revision
supports closed-loop control, and that the OPTBN board is installed in slot C.
When using closed-loop control with OPTBN, consider the following features or differences compared to the other encoder boards
used for closed-loop control.
• The value of Pulse/revolution (normally shown as P7.3.1.1) used for closed-loop control is copied from the parameterization of
the Advanced Safety Option. It cannot be edited independently.
• The parameter Reading Rate (shown as P7.3.1.3.1) can be edited normally.
• Parameter Invert Direction (normally shown as P7.3.1.2) is not supported or shown. Value "0 = No" is always used.
• The parameter Interpolation (normally shown as P7.3.1.4) is not supported. Value "0 = No" is always used.

3.6 Speed Measurement

3.6.1 Safety Speed Sensors

The speed measurement methods supported by the Advanced safety option board:
• Sin/Cos encoder
• Digital pulse encoder (TTL or HTL)
• Proximity sensor
For parametric information, see
When certified speed sensors are used, the sensors can be used to implement safety functions up to the safety level stated in the
certificate. To use these speed sensors, make sure that the sensor monitoring executed by the option board fulfills the requirements
that the sensor has for the speed monitoring device. For the monitoring executed by the Advanced safety option board, see
Encoder Signal Verification.

3.6.2 Standard Speed Sensors and Combinations

The speed measurement methods supported by the Advanced safety option board:
• Sin/Cos encoder
• Digital pulse encoder (TTL or HTL)
• Proximity sensor
For parametric information, see
The option board can be used with standard speed sensors. The table below shows the maximum achievable safety levels for com-
binations of different speed sensors without certificate.
In addition to speed sensors, it is possible use estimated speed from the control board of the AC drive as a second channel for speed
measurement diagnostics.
Calculate and take into account the relevant safety values for the encoder when assessing the fulfillment of the requirements for the
targeted safety level(s). The relevant safety values include these values:
Danfoss A/S © 2021.06
8.1.3 Speed Measurement Parameters.
8.1.3 Speed Measurement Parameters.
Overview of the System
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