Experimental Physics and
Industrial Control System

Gerrit,

One should not initialize the VAL field of a stringin record by setting the INP field to a string
(or the VAL field of a stringout record by setting DOL), as the field value might be interpreted as
a record name and the link as a channel access link.

Keep in mind that on records where INP expects a number, a constant value is used to initialize VAL, but
a constant INP link is only processed at record initialization. Writing a new value to INP via channel access
or dbput will not update the VAL field.

Another issue I have been running into with this is the order of record
initialisation. The string in this record is needed by other records and
thus should be initialised first. But from what I have read on the web so
far I understand there is no mechanism to guarantee that within one
database. However, I probably could put records like this in a separate
database and load that one in st.cmd first?

For this (within one IOC) you can use the PHAS field of a record. Records with smaller PHAS values are processed before records with higher values.

Replies:

Re: record with constant input link Gerrit Kühn via Tech-talk

References:

record with constant input link Gerrit Kühn via Tech-talk

Re: record with constant input link Simon Rose via Tech-talk

Re: record with constant input link Gerrit Kühn via Tech-talk

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