initializing a constant pv at startup

["Tran, Phi Dung via Tech-talk" <tech-talk@aps.anl.gov>]

Hi,

I am using a soft channel $(P) in one IOC to control three real motors in another IOC.

I attempted to initialize a PV, $(P)-DSI, at startup. Then, this PV should remain constant.

When $(P)-DM was processed, it has this NPP input link field to the $(P)-DSI,

field(INPB,"$(P)-DSI.VAL NPP NMS").

My $(P)-DSI was also processed to be the same as $(DOWNSTREAMMTR).VAL.  Therefore, the $(P)-DSI did not remain constant.  How do I fix problem by replacing CPP?  I tried PP and got zero for default.

Below are my records and trace

record(calc,"$(P)-DSI"){

    field(DESC,"initial downstream")

    field(INPA,"$(DOWNSTREAMMTR).VAL CPP MS")

    field(CALC,"a")

    field(PINI,"YES") #move motors

}

record(calcout,"$(P)-DM"){

    field(INPA,"$(P).VAL NPP MS")

    field(INPB,"$(P)-DSI.VAL NPP NMS")

    field(CALC,"a+b")

    field(OUT,"$(DOWNSTREAMMTR).VAL PP MS ")

}

ca:ptran1@xf19id2-ws3.nsls2.bnl.local: dbProcess of 'XF:19IDC-ES-G0{Ymove}Mtr'

ca:ptran1@xf19id2-ws3.nsls2.bnl.local: dbProcess of 'XF:19IDC-ES-G0{Ymove}Mtr-FF'

ca:ptran1@xf19id2-ws3.nsls2.bnl.local: dbProcess of 'XF:19IDC-ES-G0{Ymove}Mtr-OM'

ca:ptran1@xf19id2-ws3.nsls2.bnl.local: dbProcess of 'XF:19IDC-ES-G0{Ymove}Mtr-IM'

ca:ptran1@xf19id2-ws3.nsls2.bnl.local: dbProcess of 'XF:19IDC-ES-G0{Ymove}Mtr-DM'

scanOnce: dbProcess of 'XF:19IDC-ES-G0{Ymove}Mtr-OBI'

scanOnce: dbProcess of 'XF:19IDC-ES-G0{Ymove}Mtr-IBI'

scanOnce: dbProcess of 'XF:19IDC-ES-G0{Ymove}Mtr-DSI'

Thanks,

Phi

Attachment: galil0_Ymove_ib_ob_ds.db
Description: galil0_Ymove_ib_ob_ds.db