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3-12 3. n : 1 Connection (Multi-link 2)
• The V7 and V6 series can be used together. The V6 series can be the master station.
(However, when V606/V606i is the master station, the slave station must be
V606/V606i. Also, depending on the hardware version of the V6 series, multi-link 2
connection may not be supported. Refer to the V6 Hardware Specifications.)
Wiring
Connection
(a) Connection between PLC ↔ V7 master station
The communication parameter setting and connecting method are the same as
those for 1 : 1 connection. (Refer to “Chapter 5 Connection to PLCs.”)
(b)(c) Connection between V7 series master station ↔ V7 slave station
The connecting port for the V7 series master station depends on the selection for
[Multi-Link] (either [Modular Jack 1] or [Modular Jack 2]) on the V-SFT editor.
Selection of [Modular Jack 2] is recommended. ([Editor Port] is set as default for
[Modular Jack 1].) The connecting port of the V7 series slave station should be
CN1. It is recommended that CN1 be equipped with a terminal converter “TC485”
(set to 2-wire connection). The multi-link 2 master cable (b) (V6-MLT) is 3 m long. If
the distance (c) between the V7 series master station and the V7 series slave
station is longer than 3 m, use a terminal block and connect the cables.
(d)(e) Connection between V7 series slave station ↔ V7 slave station
Use the RS-485 2-wire connection. It is recommended that CN1 be equipped with a
terminal converter “TC485” (set to 2-wire connection).
(b)(c)(d)(e) The maximum length between V7 series should be 500 m.
* To avoid line-noise problems, connect one terminal only so that the shielded frame ground
of each cable will not be connected between the V7 series.
The shielded frame ground of V6-MLT must be connected to the V7 series master station.
* When the terminal converter “TC485” is not used, install jumpers between +RD/+SD and
−RD/−SD.
PLC
CN1CN1 MJ2
(a)
(b)
(c)
(d) (e)
CN1CN1
Communications between V7 series: RS-485 (2-wire), maximum length = 500 m
V7 master station
(= Local Port 1)
V7 slave station
(= Local Port 2)
V7 slave station
(= Local Port 3)
V7 slave station
(= Local Port 4)
Terminal block