Yaskawa P7 Metasys N2 - Manual (Page 18)

Network Connection 2-4
Network Termination
A bus-terminating resistor of 110Ω is available on each drive terminal board and can be applied to the Metasys N2 communication bus
by setting switch S1-1 to the ON position. In a multi-node system, only those nodes at the end of a bus segment should have
terminating resistors. Before applying a terminating resistor as described above, care should be taken to understand the physical
layout of the network and where other resistors might already be applied. An overloaded or improperly terminated bus may not
function properly.
Figure 2.3 – Network Termination Resistor Setting
Table 2.1 - Terminating Resistor Switch Setting
Switch Location Function Setting Choices
S1-1 RS-422 and RS-485 Terminating Resistance
OFF: No terminating resistance
ON: Terminating resistance of 110
Ω