Experimental Physics and
Industrial Control System

"Mark Rivers" <[email protected]> · Sun, 7 Nov 2010 11:51:48 -0600

Release 2-1 of the EPICS "modbus" module is now available.  This is from
the release notes:

- Bug fix. Non-automatic connection to the Modbus server uses
pasynCommonSyncIO->connectDevice(). The pasynUser being used for that
operation was being created with pasynOctetSyncIO->connect(). That was
always an error, it must be created with pasynCommonSyncIO->connect().
This error became serious with asyn R4-14, and non-automatic connection
no longer worked. 

- Previous releases of modbus recommended setting NoAutoConnect=1 when
configuring the TCP or serial port. That was probably because of
problems in connection management in earlier versions of asyn. With asyn
R4-14 this is no longer necessary, and NoAutoConnect=0, the normal
default, can be used with no problems. The example scripts Koyo1.cmd and
Koyo2.cmd in the iocBoot directory have been changed to enable automatic
connection to the IP or serial driver.

Thanks to Zen Szalata of SLAC for finding this bug.

The release notes are here:
http://cars.uchicago.edu/software/epics/modbusReleaseNotes.html

The documentation is here:
http://cars.uchicago.edu/software/epics/modbusDoc.html

The tar file is here:
http://cars.uchicago.edu/software/pub/modbusR2-1.tgz

Please let me know of any problems or questions.

Cheers,
Mark

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System