Experimental Physics and
Industrial Control System

Ron Sluiter <[email protected]> · Wed, 01 Jul 2009 09:58:08 -0500

Hello Austen,

Thanks for clarify this.  Dirk Zimoch (PSI) discovered this "bug" and sent

me a fix late last year. I assumed at the time that it was a "bug", but

based

on your communication with OMS, the problem was due to a change in
the communication protocol.

Dirk Zimoch's fix for this problem is in R6-4-2 and above of the motor
record distribution.

Since there is an initialization problems with MAXv ver:1.29 firmware and
a problem with ver:1.30 firmware reading DPRAM encoder position data
when using mixed motor types (i.e., PSE and PSO), I recommend (and the
latest version of the EPICS driver fully supports) MAXv firmware ver:1.31
and later.

Best regards,
Ron

Rose, AJ (Austen) wrote:

All,

Please note that the content of the attached e-mail.

The effect of this (for firmware versions V1.30, and later) is that the
HOME flag is 'lost' when in PSE or PSM mode when the QA and EA commands
are executed as a pair (as done in the ALL_INFO message) in drvMAXv.cc,
lines 101, 304. And the problem code is at lines 643...645, where the
HOME flag gets over-written with a ','.

Regards,

Austen Rose
Senior Software Engineer
+44 (0)1235 77(8495)

Diamond Light Source Ltd

Diamond House

Harwell Science and Innovation Campus

Didcot

Oxfordshire OX11 0DE

United Kingdom

From: Reto RT. Toengi [mailto:[email protected]]

Sent: 01 July 2009 02:07

To: Rose, AJ (Austen)
Cc: Pro-Dex Beaverton Support Group
Subject: FW: re[2]: Home input on MAXv cards

Austen,

The investigation revealed that all our command responses terminate with
a <LF> (0x0A). There is no tailing NULL.

In FW 1.29 and older a bug added a NULL after the <LF> for the commands
RA, QA, EA and RL.

In FW 1.30 and newer this NULL was removed for RA, QA and EA.
Unfortunately the RL command has still that problem. We intend to fix
this for the next firmware release.

I am not sure if this connects to your original problem of not seeing
encoder at home. Have you hardwired the encoder signal and issued the
query?

Reto Toengi

Engineer

Pro-Dex Oregon Micro Systems

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System