Experimental Physics and
Industrial Control System

Christian Pauly <[email protected]> · Wed, 02 Dec 2015 19:52:27 +0100

Hi

I have a question regarding Streamdevice and the initialization of the

hardware on ioc startup.

I would liko to control an Agilent 33250A Pulse generator using stream

device.

In order to put the device in a well defined ground state on startup of

the IOC, i would like to send a RESET command ("*RST") first.

Afterwards i would like to put the device in a well-defined initial

configuration (which might be different then the reset state) by using

the @init directive in different protocol functions (as described in the

streamdevice docu).

The best would be, to have a separate protocoll function with @init

section, which is only used for initial reset+configuration, and which

is for sure processed before all others.

However, after some trying and reading the manual, i understand that the

individual @init sections from different protocol functions are

processed in a more or less random, non-defined order.

How can i make sure, that a "*RST" command is executed first, before

later the individual protocol routines @init sections are used to read

the device status into the control records

(here i dont care any more about the sequence)?

I dont want to shift all initialization into the db record definition

using a initialization record ("PINI 1"), since then the individual

@init sections, used to fill the records with the actual device status

at startup, would be processed before the *RST command, and the records

would not reflect the real device status at startup.

Is there any standard concept for this problem ?

Thanks for any advice,

Christian

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System