TR-Electronic CDV582 - Miscellaneous Faults

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11/21/2019 TR - ECE - BA - GB - 0139 - 02 Page 87 of 154
6.3.6 Preset adjustment function
Risk of death, serious physical injury and/or damage to property if the
drive system starts uncontrolled while executing the Preset Adjustment
function!
 The relevant drive systems must be locked to prevent automatic start-
up
 We recommend to protect triggering of the preset adjustment function
via the F Host by taking additional safety measures, such as key-
operated switch, password, etc.
 It is absolutely necessary to follow the operational sequence described
below, particularly to evaluate the status bits by means of the F Host,
in order to check whether the preset adjustment function has been
executed successfully or unsuccessfully
 The new position must be checked after execution of the preset
function
The preset adjustment function is used to set the currently output actual position value to any actual
position value within the scaled measuring range. This allows to electronically set the displayed
position to a machine reference position.
6.3.6.1 Procedure
 Requirement: The measuring system is in cyclical data exchange mode.
 Ensure that the parameter Preset affects S_XIST32 is set to enable, and that the
acknowledgment bits 2
2
Activation of preset function and 2
6
Preset triggering in
the status word S_ZSW1_ENC are cleared (SP1, Figure 14).
 Set the register S_PRESET32 in the output data of safety telegram 36 (BP/XP) or 37 (BP/XP)
to the desired preset value.
 In the control word S_STW1_ENC, set bit 2
0
Activation of preset function to 1. The
activation is acknowledged in the status word S_ZSW1_ENC by setting bit 2
2
(SP2, Figure 14).
 The preset value is applied when the edge of bit 2
6
Preset triggering rises in the control
word S_STW1_ENC. The measuring system then checks whether all prerequisites for execution of
the preset adjustment function are fulfilled. If yes, the preset value is written as a new actual
position value and acknowledged in the status word S_ZSW1_ENC by setting bit 2
6
Acknowledgment, Preset triggering (SP3, Figure 14). If no, execution is rejected and an
error message is output via the status word S_ZSW1_ENC by setting bit 2
5
Preset error.
 After editing the preset adjustment function, bit 2
6
Preset triggering must be reset to 0 in
the control word S_STW1_ENC. Bit 2
6
Acknowledgment, Preset triggering is then
automatically reset to 0 in the status word S_ZSW1_ENC, indicating that the preset execution has
been completed (SP4, Figure 14).
 To execute a new preset control cycle, bit 2
0
Activation of preset function must be
reset to 0 in the control word S_STW1_ENC. Bit 2
2
Acknowledgment, Activation of
preset function is then automatically reset to 0 in the status word S_ZSW1_ENC
(SP1, Figure 14).
 Finally, the F Host must check that the new position corresponds to the new command position.