CHAPTER 6 CONTROL FROM LONWORKS
19
6.1.6 Read value from an address
The address set in nciRdAdr will be polled and result will be written to nvoParam as often as value on
address changes or the workload on the host application and nciMinOutTime allows.
If nciRdAdr is set to 0x0070 it will not load the network with information not wanted or needed for the moment.
This is recommended to minimalize network load. Addresses in the 0xFFFF**** area can not be read.
0x08000070 is an area in SJ300/L300P where access is inhibited. There are other areas in SJ300/L300P
were access is inhibited but if such address is set it to nciRdAdr the option board will try to read it anyway.
See appendix 1 for a list of valid addresses.
Default value: 0x08000070 (Access Inhibited in SJ300/L300P)
Address wanted
NciRdAdr
NvoParam
0x08000070
0x0070
Zero or latest polled value , not updated
Other access inhibited area
Other access inhibited
area
Polled from SJ300, continuously updated
Valid address
Valid address
Polled from SJ300, continuously updated
6.1.7 Reset fault
If an error has occured SJ300/L300P will trip. By removing the reason for tripping and setting nviObjRequest
to RQ_CLEAR_ALARM it can be reset.
6.1.8 Prioritation between nciMinOutTm and nciSendHrtBt
The nciMinOutTm will have prioritation over nciSendHrtBt. This will mean that heartbeats will not be sent as
often as specified in nciSendHrtBt if nciMinOutTm has a longer time set.
6.2 Save data in SJ300/L300P EEPROM
To store parameter values set from option board in SJ300/L300 between power-cycles they have to be saved
in SJ300/L300P EEPROM.
Setting nciWriAdr to 0xFFFF (65535 decimal) and writing any value to nciWriValue will save parameters to
SJ300/L300P EEPROM.
NOTE : The inverter will be stopped using the normal stop ramp before saving, so it’s recommended to send
the save command only when inverter already is stopped.
The values set from option board will now remain the same after a boot sequence of the inverter.
There is no need to use the saving to EEPROM function when parameters are set from the digital operator
since they always are saved between power-cycles.
6.3 Optionboard Error handling
If there is no response from SJ300/L300P on the serial channel in three messages in a row communication is
believed to be down.
Communication with LON is considered down if heartbeats aren’t received within nciRcvHrtBt time.
This will make SJ300/L300P trip.
