Scaling System; Brief Description; Functional Description - Bosch rexroth ctrlX SAFETY SafeMotion Applications Manual

ctrlX SAFETY "SafeMotion"
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Scaling system

Not all encoders are approved for "safe encoder evaluation". Therefore, only
the data of approved encoder types are applied. The command "C8400" can
only be executed in the configuration mode (SCM) if the safety technology
password (P-0-3230.0.1) is set.
After the encoder configuration has been successfully applied, the SMO
encoder parameters have to be verified.
If the encoder configuration cannot be applied, command errors C840x is gen-
erated depending on the error cause.
The parameterization of the safe encoder evaluation is subject to a fixed order,
because there are dependencies between the parameters:
● First of all, the encoder has to be parameterized in the standard firmware in
● Subsequently, the physical data of the safe encoder have to be parameter-
● Finally, define the encoder mechanical system (P‑0‑3252.1.2, P‑0‑3252.1.3
The complete function is only achieved by parameterizing the entire mechanics
and the scaling.
7.3 Scaling system
7.3.1

Brief description

Scaling defines the input format of a parameter; i.e. the relation between the
input value and the physical unit is established.
An operating data (numerical value) can only be evaluated as a physical value,
when the numerical value is connected to a physical unit and the position of
the decimal point (decimal places). The data thereby is "scaled" in a qualitative
and quantitative way.
For "SafeMotion" there are independent scaling and mechanics parameters that
can be selected independently of the scaling parameters of the standard firm-
ware. These independent safety technology scaling parameters are processed,
stored and verified in accordance with the requirements on safety-related sys-
tems.
For example, for applications with switchable gearboxes and load-side scaling
of the standard drive, it might be useful to select differing scaling settings for
"SafeMotion". In this case, "SafeMotion" can be configured with "data reference
to motor shaft"; it is then independent of the gearbox and the scaling of the
standard drive.
7.3.2

Functional description

The scaling of "SafeMotion" is independent of the standard scaling of the drive;
the scaling settings can be different.
There are two options for setting the scaling:
● Preferred scaling: Predefined settings for "unit", "time unit" and "exponent".
● Parameter scaling: Settings to be defined by the user for "unit", "time unit"
"Unit" and "time unit" are physical values. The "exponent" defines the number
of decimal places of the scaled values.
Bosch Rexroth AG
order to activate the power supply at the encoder interface.
ized (P‑0‑3242.x.1, P‑0‑3242.x.2 and P‑0‑3242.x.4 & P‑0‑3242.x.6 as well as
P‑0‑3242.x.9 and P‑0‑3242.x.10 ); the "encoder property" determines the
unit of the "encoder resolution".
and P‑0‑3252.1.4).
and "exponent".
R911404905, Edition 02