Displaying Current Values (Job 15) - Siemens simatic et 200s Operating Instructions Manual

1PosUniversal/Digital
7.6 Functions of the 1PosU
7.6.17

Displaying Current Values (JOB 15)

Definition
You can display the following values in the feedback interface as feedback values:
● Residual distance
● Actual speed
● Causes of errors for POS_ERR and JOB_ERR
The residual distance is set by the 1PosU as the default for the feedback value.
The 1PosU continuously displays the actual value in the feedback interface irrespective of
the selected feedback value.
This moves the operating range to another part of the axis and synchronizes the axis.
The selected feedback value remains valid until the parameter assignment of the 1PosU is
changed.
Displaying Current Values and the Latch Function
If you activate the latch function, the 1PosU sets a feedback value of 0 and displays the
actual value at the edge at the D12 digital input.
You can only activate JOB 15 again after the latch function has terminated.
Residual distance
The 1PosU calculates the distance to the destination as the residual distance in the absolute
positioning and relative positioning MODEs. As long as the actual value is before the
destination, the residual distance remains positive. It becomes negative once the destination
is overshot. The residual distance is 0 in the other MODEs.
The 1PosU displays the residual distance with a sign between -8 388 608 and 8 388 607
increments. Negative values are displayed in twos complement. If the actual residual
distance is beyond these limits, the limit value is displayed.
Actual speed
The 1PosU calculates the actual speed as an encoder value change in increments per 10
ms. It displays these between 0 and 16 777 215.
Causes of errors for POS_ERR and JOB_ERR
The 1PosU displays the causes of errors for POS_ERR and JOB_ERR as well as the MODE
and JOB entered in the control interface.
Effect on the MODEs
MODEs are not affected by JOB 15.
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Operating Instructions, 05/2007, A5E00124871-04
ET 200S Positioning