Omron Model Limit

hi team,
is there any restriction in ignition that only certain number of device can be connected at a time?
I am using Omron FINS TCP device. i have connected 20 devices . if some of the devices are connected others are going to reconnect Wait mode.
Omron Model used: CP1L
Ethernet Option board - CP1W-CIF41

Multiple posting for the same issue is prohibited by the forum rules.