Active modbus read function upon request

[Philippe Laurent <laurent.philippe@ganil.fr>]

Hi Marc,

I would like to active some modbus port drivers upon request for retrieving Post Mortem datas.

It is possible to configure database such that the modbus read function is called only when a record is processing ?  (like write function)

If not, what is the best option to temporary desactive the modbus pooling ?

1. Dynamically start an IOC well configured
   
2. Just set an huge POLL DELAY on the modbus port
3. Disable the asyn port with asyn record, I observe that :
   1.  modbus pooling thread is always active 
      
   2. trace in ioc shell : drvModbusAsyn::doModbusIO port LBEC-DCCT31:PostMortemRd2 disconnect error=asynManager::queueLockPort queueRequest failed: port LBEC-DCCT31 disabled
4. Other
   

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