TR-Electronic CDV582 - TR Safety Scaling Parameter

Parameter description
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Page 66 of 91 TR-ECE-BA-GB-0163 v03 10/07/2020
9.1.19 TR Safety – Scaling parameter
Risk of physical injury and material damage due to shifting of the zero
point when the measuring system is switched on again after positioning
in de-energized state!
If the scaling parameter settings listed below deviate from the default settings,
the zero point of the multi-
turn measuring system may be lost if more than the
permissible revolutions are performed in the de-energized state!
• SIL2 – measuring system: Make sure that positioning operations in de-
energized state take place within 3200 revolutions on a multiturn measuring
system.
• SIL3 – measuring system: Make sure that positioning operations in de-
energized state take place within 320 revolutions on a multiturn measuring
system.
•
If this cannot be ensured, the issued position must first be verified with the
desired mechanical position before the applica
tion can be started.
Too high revolutions ar
e indicated by the cyclic process input data in
TR Safety – Status, Bit 7 Scaling Error
= 1 when the measuring
system is restarted in case the actual revolutions exceed the permissible
revolutions. After positive verification, the Scaling Error
bit can be
cleared by executing the preset adjustment function, see Chapter 10
on
Page 74.
The physical resolution of the measuring system can be changed by using the scaling parameters
– TR Safety – Measuring Range
– TR Safety – Revolutions Numerator
– TR Safety – Revolutions Denominator
The measuring system supports the gear function for rotary axes.
This means that the number of steps per revolution and the quotient of Revolutions numerator
/ Revolutions denominator can be a decimal number.
The output actual position value is offset by a zero-point correction, the set counting direction and the
entered gearbox parameter.
MEASURING RANGE
Defines the total number of steps of the measuring system, before the measuring system restarts at 0.
UDINT
Lower limit
2 steps
Upper limit
536 870 912 steps (30 bits)
Default 536870912
The actual upper limit value to be entered for the measuring range in steps depends on the
measuring system design and can be calculated using the formula below. As the value "0" is already
counted as a step, the end value = measuring range in steps – 1.