Modbus issue

[illinols]

I am trying to read registers from a device using Modbus.
(Forte release)

The CLIENT_1 FB reports QO = TRUE and STATUS = OK, but no data appears on the output.
The request ID looks like this:

modbus[...**:502:1000:3::1:3]
protocol: tcp
ip: ***
port: 502
slaveId: 1
pollFrequency: 1000
readAddresses: 3 (h)

The same request works correctly from a Linux terminal and returns a value:

modpoll -m tcp -p 502 -a 1 -r 3 -t 4 -0 ...**

So the device and the Modbus TCP connection itself are working.
Could someone point out what might be wrong with the Modbus request?

console:
INFO: T#1828588613253415: Connection to Modbus server succeded
ERROR: T#1828589614819474: Error reading input status :: Slave device or server failure