Experimental Physics and
Industrial Control System

[email protected] · Wed, 10 Sep 2014 10:30:53 +0200

Dear Ralph,

Thanks for the comment.

> The "cainfo" command line tool will tell you if you can connect
> successfully, and if you have the necessary access rights. (Which you
> should have if caput does not show errors.)
>

The outuput of cainfo is
LEBT:LEBT:PS:STH1:OPER:CurrSP
    State:            connected
    Host:             10.30.0.10:5064
    Access:           read, write
    Native data type: DBF_DOUBLE
    Request type:     DBR_DOUBLE
    Element count:    1

> Some records have mechanisms (like the DRVH/DRVL drive limits of the ao
> record or the OMSL mode selection of many output records) that would
> reject certain values written to the PV. Some fields of some record
> types cannot be written to at all through Channel Access (see the Record
> Reference Manual for details on that).
>
> What value are you trying to write to which field of what record type?
>

THis is the current setpoint of a power suplly.
The IOC db file contains this information
record(ai,"LEBT:PS:STH1:OPER:CurrSP"){
  field(INP,"LV:LEBT:PS:STH1:OPER:CurrSP CP")
  field(DESC,"PS EXT Voltage")
  field(DESC, "LEBT STH1 Current SP")
}

I guess that I am trying to change the INP field which has no access
permission according to the Record Reference Manual, isn't it?
In this case how is possible that the value can be changed with the CSS GUI?
Should have the record a VAL field?

Sorry if they are trivial questions; but I new to EPICS.

Zunbeltz

> Cheers,
> ~Ralph
>
>
>

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System