SW-developer

We have 2 devices we are experimenting with to use in our systems for small scale Data Acquistion. Both units behave the same. We are reading Discrete in on PortA at 200Hz, every 5 milliseconds, however the read times on average take 200 microseconds with occasional jumps of up to 10 Milliseconds. Are we at the devices limit or is there an option in the hardware or the UL library that can be enabled to make the read time consistent? We are using the UL library and example code on Oracle Linux 8.