Experimental Physics and
Industrial Control System

Hello,

I try to read a INT32_BE array from a modbus function into a Waveform using dtyp = asynInt32Array.

I get a array of long in the waveform, but the data are not correctly read from modbus.

It looks like, the driver constitutes a long with :

modbus index 0 + modbus index 1-> waveform data[0]
modbus index 1 + modbus index 2-> waveform data[1]
modbus index 2 + modbus index 3-> waveform data[2]
...
Instead of :

modbus index 0 + modbus index 1-> waveform data[0]
modbus index 2 + modbus index 3-> waveform data[2]
modbus index 3 + modbus index 4-> waveform data[3]

My record is :

record(waveform, $(EQPT):PostMortemRaw2) {
  field(DTYP, "asynInt32ArrayIn")
  field(DESC, "input modbus data")
  field(NELM, "50")
  field(FTVL, "LONG")
  field(SCAN, "I/O Intr")
  field(INP,  "@asyn($(EQPT):PostMortemRd2 0)INT32_BE")
}

My modbus function is :

drvAsynIPPortConfigure("LBEC-DCCT31","172.16.60.231:502",0,0,1)
modbusInterposeConfig("LBEC-DCCT31",0,300,2)
drvModbusAsynConfigure("LBEC-DCCT31:PostMortemRd2","LBEC-DCCT31",1,3,228,100,6,2000,"PLC")