Experimental Physics and
Industrial Control System

I suspect that error is harmless.  The Modbus driver may be calling
asynCommon->connect() again when the port is already connected, but that
should not matter.

Mark


-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Stephen Lewis
Sent: Tuesday, November 24, 2009 5:49 PM
To: EPICS
Subject: (Another) Modbus problem

Like Emma, I am having a connect problem, however, it was all working  
in another place, so I suspect the serial cable between the Digi  
terminal server is the problem.  Nevertheless, here are the relevant  
software details:

EPICS 3.14.19
RTEMS 4.7
asyn R4-9

in st.cmd:
==========
drvAsynIPPortConfigure("ET-701"."ts-fee-801:2105 TCP",0,0,0)

immediate response:
===================
ts-fee-801:2105 TCP: Link already open!

When the IOC is terminated the Digi shows no connections; when the IOC  
is started the Digi shows the connection is there.  The Digi port is  
of type "TCP".

What 'link' is being referred to here?


Stephen Lewis
[email protected]
650.926.3791
650.926.7963
   ___o 	
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(_)/  (_)

References:

(Another) Modbus problem Stephen Lewis

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