Slot Parameter Handling (Control Interface) - Siemens SIMATIC ET 200SP Manual

6.2

SLOT parameter handling (control interface)

SLOT and MODE_SLOT
SLOT has the following modes.
● Single-update mode (MODE_SLOT = 0)
Use this mode if some parameters have to be changed sometimes, prior to starting the
output sequence. Using the SLOT parameter is an alternative to sending a new
parameterization record to the module. A pulse operation change made with the SLOT
parameter does not reset the module. A pulse operation change made by sending a new
parameterization record does reset the module.
– The value in SLOT is used each time the value in LD_SLOT changes.
– An acknowledge bit is toggled in the feedback interface STS_LD_SLOT.
– The interpretation of the SLOT is defined by the value of LD_SLOT (see the following
– If the LD_SLOT value is invalid, a parameter error is triggered ERR_LD, and the user
– The changes done in this mode can be read back from the module in the
– The changes done in this mode are not permanently stored in the CPU. A restart of
● Permanent-update mode (MODE_SLOT = 1)
Use this mode, if in addition to the main controlled parameter, another parameter has to
be controlled continuously by the program.
– The value in SLOT is transferred each module cycle.
– No acknowledge bit is available.
– The interpretation of SLOT is defined by the value of LD_SLOT (see the following
– If the value in SLOT is not valid, then the error ERR_SLOT_VAL occurs. The error is
– Using this mode, the value is not updated in the parameterization record. If LD_SLOT
– The permanent update mode can be stopped by setting LD_SLOT to 0 and
Technology module TM Pulse 2x24V (6ES7138‑6DB00‑0BB1)
Manual, 09/2015, A5E35061186-AA
table).
has to reset the error using the RES_ERROR control bit to reactivate SLOT.
parameterization record.
the CPU resets the parameters to the values specified in the hardware configuration.
table).
automatically reset once a valid value is loaded. Note that the ratio values are not
checked, if the value is higher than the format allows, a ratio of 100% will be used by
the module.
is changed in this mode, the last valid value controlled previously is retained.
MODE_SLOT to 0. By stopping permanent update mode, changes made to
parameters during permanent update mode are retained.
Program control and feedback interface
6.2 SLOT parameter handling (control interface)
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