Rockwell Automation Logix5000 Controllers Tasks, Programs, and Routines Programming Manual - Manual (Page 44)

Chapter 2 Manage event tasks
The following table lists nominal hardware response times for 1756 I/O modules
with event tasks.
Cat. No. Nominal response time µs
25 °C
60 °C
Off → On On → Off Off → On On → Off
1756-IB16 265 582 265 638
1756-IB16D 303 613 305 673
1756-IB32/B 330 359 345 378
1756-IV16 257 435 254 489
1756-IV32 381 476 319 536
1756-OB16D 48 519 51 573
1756-OB16E 60 290 61 324
1756-OB32 38 160 49 179
1756-OV16E 67 260 65 326
1756-OV32E 65 174 66 210
Example – estimate throughput
The following example shows the throughput considerations for the system shown
in the following illustration. In this example, the throughput is the time from
when the input turns on to when the output turns on.
44 Rockwell Automation Publication 1756-PM005-EN-P - October 2014