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 <[email protected]> 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:[email protected]
>
>
>
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