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.
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 |
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 |
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).
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