User guide

Chapter 6
642
External Device Setup Manual
5 Restrictions
Note the following restrictions when performing 1: N communication.
• Maximum number of units to be connected
Using RS485 : 31 units
Using Ethernet : 16 units
(May vary depending on the PLC type. Refer to the manual of your PLC for details.)
• Maximum number of source devices at one time
The maximum number of devices (including O/I Link) that can be read at one time is 8192. Devices exceeding this limit cannot be read out.
• Precautions for using the Simulation Mode
When the communication setting on the HG1F/2F/2S/3F/4F is set to 1:1, the external device values are retained even after
the screen is changed. However, if set to 1:N, or when using the HG2G-S/-5S/-5F, HG3G/4G, Touch, the external device
values are not retained.