回覆: Only one network interface of three NF CA5351 Current Amplifiers is accessible

[Chiang, Liang-Chih [江良志] via Tech-talk <tech-talk at aps.anl.gov>]

Hi,

The 3 devices use static IP address within a private LAN.

IP address: 192.168.2.xxx

subnet mask:  255.255.255.0

The IP setting menu of the device:

https://www.dropbox.com/s/9ima7xrw3n9yubx/2021-02-26%2011.56.51%20NF%20CA%205351%20IP%20setting.jpg?dl=0

> "accessible"

From another computer in the same private LAN, use "ping" command.

>   Have you tried pinging all 3 devices when only 1 is “accessible”?

Yes.

I ping all 3 devices continuously.

Only one of them replies to ping.

> What do you need to do to get back to the bad state?

I don't know.

The bad state happened twice in the last 3 months.

1.

I developed an EPICS support module for the device (using asyn and streamdevice),

and it works. That is, I can remotely control the device via IOC server/PVs.

For some reason, the devices and the IOC server must be power-off for several days.

After power-on the devices and IOC server, the devices got into the bad state.

2.

I don't quite exactly know the operations to get into the bad state,

because I was not there while the endstation scientists operating the beamline equipments.

But it seems to involve power-off/on the devices and unplugging/replugging the signal cable of the devices.

Best regards.

---

寄件者: Mark Rivers <rivers at cars.uchicago.edu>
寄件日期: 2022年3月22日 下午 11:24
收件者: Chiang, Liang-Chih [江良志]
副本: tech-talk at aps.anl.gov
主旨: RE: Only one network interface of three NF CA5351 Current Amplifiers is accessible

 

Can you give some more information:

-          Have you configured these for static IP addresses or DHCP?

-          When you say “accessible” how are you defining this?  Have you tried pinging all 3 devices when only 1 is “accessible”?

-          You can get it into a state where “everything is fine”.  What do you need to do to get back to the bad state?

 

Mark

 

 

From: Tech-talk <tech-talk-bounces at aps.anl.gov> On Behalf Of Chiang, Liang-Chih [???] via Tech-talk
Sent: Monday, March 21, 2022 10:53 PM
To: tech-talk at aps.anl.gov
Subject: Only one network interface of three NF CA5351 Current Amplifiers is accessible

 

Hello,

 

I have three NF CA5351 Current Amplifiers and use Ethernet/LAN to access them remotely.

(product webpage: https://www.nfcorp.co.jp/english/pro/mi/loc/pre/ca5351/index.html  )

 

For some reason which I don't know, they would behave erroneously.

Only one of them is accessible remotely, and after several seconds, the accessible one will change.

That is,

only no. 1 is accessible,

 several seconds passed,

only no. 2 is accessible,

several seconds passed,

only no. 3 is accessible,

several seconds passed,

...repeat the above sequence...

 

I try rebooting the devices, doesn't work.

 

The solution I found is:

Unplug the network cable,

change the IP address of the device,

change the IP address back to the original setting,

plug the network cable.

 

Then everything is fine.

 

Does anyone have any idea about this bizarre behavior?

 

 

Best regards.

 

 

LiangChih Chiang

NSRRC Beamline group

email: chiang.lc at nsrrc.org.tw