RE: Question about the connection refused

[lzfneu <lzfneu@live.com>]

Hi Mark,

Actually,  I need to read the dose rate from a radiation monitor counter by using epics.

I installed the asyn4-29 and modbusR2-8 packages. 

As a new user in epics, I edited the modbus ioc example in iocTest folder and the file named Koyo1.cmd:

I changed the IPaddress to the actual IPaddress of radiation monitor counter.

drvAsynIPPortConfigure ("Koyo1","192.168.1.125:502",0,0,1)

after starting the ioc:
> $ modbusApp Koyo1.cmd

the first error occurs in command:  

# write 32 bits (Y0-Y37). Function code = 5

drvModbusAsynConfigure("K1_Yn_Out_Bit", "Koyo1", 0, 5, 04000, 040, 0, 1, "Koyo")

2016/03/25 11:33:29.067 drvModbusAsyn::doModbusIO port K1_Yn_Out_Bit error calling writeRead, error =192.168.1.235:502 timeout: Resource temporarily unavailable, nwrite=6/6, nread=0

and the sequenct errors were:

# Write 8 words (128 bits).  Function code=6.

drvModbusAsynConfigure("K1_Yn_Out_Word", "Koyo1", 0, 6, 040500, 010, 0, 100, "koyo")

drvModbusAsyn 

2016/03/25 11:33:34.073 drvModbusAsyn::doModbusIO port K1_Xn_Bit error calling writeRead, error=192.168.1.125:502 timeout: Resource temporarily unavailable, nwrite=6/6, nread=0

2016/03/25 11:33:39.078 drvModbusAsyn::doModbusIO port K1_Xn_Word error calling writeRead, error=192.168.1.125:502 timeout: Resource temporarily unavailable, nwrite=6/6, nread=0

2016/03/25 11:33:44.084 drvModbusAsyn::doModbusIO port K1_Yn_In_Bit error calling writeRead, error=192.168.1.125:502 timeout: Resource temporarily unavailable, nwrite=6/6, nread=0

I have to stop the output in the terminal window. 

I performed the ping 192.168.1.125:502 command and found that the computer and radiation monitor counter connected well.

It seems the read and write error occurs when they communicate with each other.

I am confused and really don't know how to do next. Could you plesase help me and thanks in advance.

Best regards,

Zhefu

> From: rivers@cars.uchicago.edu
> To: lzfneu@live.com; tech-talk@aps.anl.gov
> Subject: RE: Question about the softioc connection refused ?
> Date: Sat, 19 Mar 2016 12:55:02 +0000
>
> Hi Zhefu
>
> > I edited the Koyo1.cmd file to change the ip address in function with two conditions:
> > 1) drvAsynIPPortConfigure("Koyo1","127.0.0.1:5065",0,0,1)
> > where 127.0.0.1:5065 is my localhost ip address.
>
> This is not correct. You have specified port 5065 for the drvAsynIPPort driver that is supposed to connect to a Modbus server. Port 5065 is not used for Modbus, it is used for EPICS channel access.
>
> You cannot run the test application in the Modbus directory unless you actually have a Modbus server that you can connect to. Do you actually have a Modbus server? If so, then you specify its IP address and port 502 in the drvAsynIPPortConfigure command.
>
> Mark
>
>
> ________________________________
> From: tech-talk-bounces@aps.anl.gov [tech-talk-bounces@aps.anl.gov] on behalf of lzfneu [lzfneu@live.com]
> Sent: Saturday, March 19, 2016 7:26 AM
> To: tech-talk@aps.anl.gov
> Subject: Question about the softioc connection refused ?
>
> hi,
>
> I have encountered another softioc connection problem:
>
> I have insatlled modbus-R2-8, and want to run test example (file named Koyo1.cmd) in the iocTest folder.
>
> I edited the Koyo1.cmd file to change the ip address in function with two conditions:
>
> 1) drvAsynIPPortConfigure("Koyo1","127.0.0.1:5065",0,0,1)
> where 127.0.0.1:5065 is my localhost ip address.
>
> 2) drvAsynIPPortConfigure("Koyo1","192.168.1.255:5065",0,0,1)
> where 192.168.1.255:5065 is my broadcast ip address that obtained by command ifconfig.
>
> after starting the ioc:
> $ modbusApp Koyo1.cmd
>
> the results are both two ip address cannot connect the Koyo1, the error messages are shown below:
>
> 1) drvAsynIPPortConfigure("Koyo1","127.0.0.1:5065",0,0,1)
> 2016/03/19 19:40:19.158 Can't connect to 127.0.0.1:5065: Connection refused Koyo1 -1 autoConnect could not connect
>
> 2) drvAsynIPPortConfigure("Koyo1","192.168.1.255:5065",0,0,1)
> 2016/03/19 20:19:49.083 Can't connect to 192.168.1.255:5065: Network is unreachable Koyo1 -1 autoConnect could not connect
>
> I am new in epics, could you plesase help me and thanks in advance.
>
> Best regards
>
> Zhefu
>