Experimental Physics and
Industrial Control System

高振华 via Tech-talk <tech-talk at aps.anl.gov> · Tue, 25 May 2021 15:26:48 +0800 (GMT+08:00)

Hi Mark,
Thanks,two questions remain:
 1. Is the Dbpf command placed after iocInit written to the PLC after the IOC is started and before the scanner
    mechanism starts scanning processing?
 2. Is it performed as the first write to the PLC with the start of the IOC?

Best regards.
Gao Zhenhua

> -----原始邮件-----
> 发件人: "Mark Rivers" <rivers at cars.uchicago.edu>
> 发送时间: 2021-05-25 09:00:06 (星期二)
> 收件人: "高振华" <gaozh at ihep.ac.cn>
> 抄送: "tech-talk at aps.anl.gov" <tech-talk at aps.anl.gov>
> 主题: Re: How to set bo PV to zero when starting Modbus IOC
> 
> Hi Zhenhua,
> 
> The value in the database file will be replaced by the value read from the device. 
> 
> There are 2 ways to force the value to zero when the IOC start up:
> 
> - Add the PV to autosave and set the value to 0 before the IOC reboots. The value in autosave will be written to the device if PINI=1.
> - Put a dbpf command after iocInit which writes zero to the PV.
> 
> Mark
> 
> 
> Sent from my iPhone
> 
> > On May 24, 2021, at 7:39 PM, 高振华 <gaozh at ihep.ac.cn> wrote:
> > 
> > Hi Mark,
> > I tried to set BO PV to zero when starting Modbus R2-11 IOC, but failed. PINI worked, but VAL didn't work.When IOC is started, what is written to PLC is the value that has just been read.
> > Can't the Modbus R2-11 driver set BO PV to zero when IOC starts?
> > 
> > Best regards.
> > Gao Zhenhua
> > 
> > --
> > BSRF(Beijing Synchrotron Radiation Facility)
> > Email:gaozh at ihep.ac.cn
> > 
> > 
> > 

--

祝好！
高振华

电话：010-88235426
Email:gaozh at ihep.ac.cn

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System