I have cpu313c but in cpu I have no conter,DI8*DC24V,AI5/AO2*12bit,DI16/DO16*DC24V with firmware v2.0.8.By the way I also have done hardware update but no result.
The provided CPU nr does have an onboard counter. 3 actually.
In the HardwareConfig it is part of the CPU.
2. CPU
2.2 Digital IO
2.3 Analog IO
2.4 Counter