Experimental Physics and
Industrial Control System

Zenon Szalata <[email protected]> · Thu, 23 May 2013 08:13:30 -0700

I am using modbus 2.4. Part of the distribution there is

poll_delay.template file in the Db sub-directory. You can use it to

create a data base record for the port in question and then at any time

change the poll timeout for the associated thread poll routine. This

works for me.

Zen

On 05/23/13 06:25, Fabian S. wrote:

Hello,

the current modbus driver is working fine but the client is a bit slow.
Unfortunately there a many (~100) different addresses where I have to
read data from. In the end the client is quite busy because of all the
opened connections.

There is the opportunity to collect the data from a couple of addresses
just once or not so often. (initialized are all with 1000mSec)
At first I tried to reconfigure them with "asynSetOptions" but thats not
possible with modbusdriver. Second I tried to reinitialize them with a
greater polltime but they were already configured of course.

Is there a way to disconnect the driver and reinitialize them afterwards
or better of course any way to reset the poll time?

here is the used config as an example

## drvModbusAsynConfigure(portName,         tcpPortName, slaveAddress,
     modbusFunction, modbusStartAddress, modbusLength, dataType,
pollMsec, plcType);
drvModbusAsynConfigure("modbus_Errors_read",    "modbusdevice01",     1,
         4,          39268,          33,            0,      1000,     "none")
...
...

thanks in advance
Fabian

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System