Modbus and SScan acquisition synchronisation and timestamp query

[Kuldeep Joshi via Tech-talk <tech-talk at aps.anl.gov>]

Hello,

I am having a device communicating over Modbus/TCP with four analog input channel

I am using these individual channels with ai records and SCAN in I/O Intr mode.

These four channels are used as detector PV's in SScan record.

I wanted to trigger the Detector acquisition only after all the four ai PV are processed (i.e. after I/o Intr processing of ai record).

Is there any way to do this and can I get the time stamp of the modbus read/write operation.

I am using EPICS 7 with modbus 3.3 asyn 4.42 streamdevice 2.8.22

Thank you in advance.

Regards,

Kuldeep