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6.9 Acyclic data transmission (parameterization)
Via the acyclic parameter data transmission, parameters of the devices can be changed or selected.
Cyclical and acyclical services can be used in the network simultaneously.
Read data record “RDREC”:
For reading access to a data record, the slot, index and length of the data record must be entered. At step
7 and when using the SFB 52 the Logical Address of the slot is to be entered instead of the slot. As such
the device at slot X1 is to be activated as the device at slot 1.
Write data record “WRREC”:
For writing access to a data record, the slot, index, length of the data record and the new value must be
entered. At step 7 and when using the SFB 53 the Logical Address of the slot is to be entered instead of
the slot.
Error code Meaning
DE80B000 The unit does not recognize the parameter (invalid index)
DE80B100 The length entry of the parameter is incorrect
DE80B200 The projected slot is not occupied
DE80B300 The actual unit type does not match the set unit type
Error code Meaning
DF80B000 The unit does not recognize the parameter (invalid index)
DF80B100 The length entry of the parameter is incorrect
DF80B200 The projected slot is not occupied
DF80B300 The actual unit type does not match the set unit type
DF80B600 The parameter cannot be changed
DF80B700 Invalid range of values of a parameter
You will find the parameter tables (acyclic) of each of the device types in Appendix 17 (A).