Cable Length And Terminating Resistance Settings - Omron SYSMAC CVM1 Series Operation Manual

Cable Length and Terminating Resistance Settings

Transmission Line
and Terminating
Resistance Switches
(WIRE and TER)
2-4

Cable Length and Terminating Resistance Settings

Cable Length
Node 0
Terminator ON
WIRE
4 ↔ 2
TER
ON ↔ OFF
PC LINK
Name Function
WIRE Transmission line
setting
TER Terminating resis-
tance setting
For details on setting these switches, refer to 3-3-5 Setting the Transmission
Line and Terminating Resistance.
Node 1
Terminator OFF Terminator OFF
I1
L2
L1
• The basic structure of the PC Link system has a main line with extending
branch lines. The total length of the cables in the PC Link system (includ-
ing the main line and branch lines) must not exceed 500 m.
L + L + L + ... L
1 2 3
• The individual branch lines must not exceed 10 m.
≤ 10 m, I ≤ 10 m, ... and I
I
1 2
Transmission Line Selector Switch
Terminating Resistance Setting Switch
Left side
Four-wire method
(Set when using electrical
and optical fiber cable.)
Terminator connected.
Node 2 Node n-1
Terminator OFF
I2
L3
≤ 500 m
+ I + I + ... I
n 1 2 n-1
≤ 10 m
n-1
Section 2-4
Right side
Two-wire method
(Set when using electrical
cable only.)
Terminator disconnected.
Node n
Terminator ON
I (n−1)
Ln
17