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7-3-2 VS Computer Link Slave
RS- 485
VS
protocol
RS- 232
VS
protocol
When the VS PLC’s communication port has been set to the application type of the “VS Computer Link Slave”, the
human-machine interface (HMI) or supervisory control and data acquisition system (SCADA) can access the VS PLC’s
data through the “VS Compurter Link Protocol” (hereby referred to as VS Protocol).
A computer or HMI through the “VS Protocol” could communicate with the VS PLCs. The HMI or SCADA supplier base
on the “VS Protocol” to compile its driving programs, by way of that communicates with VS PLC’s to construct a
monitoring area network.
VS
protocol
VS
Slave
VS
Slave
VS
Slave
VS series
PLC
VS series
PLC
VS series
PLC
HMI
or
SCADA
HMI
or
SCADA
Selectable: 300/600/1200/2400/4800/9600/19200/34800/57600/115200 bps.
VS Compurter Link Protocol (hereby referred to as VS Protocol)
Half-duplex
Bits-per-character: 8 bits; parity check: None; stop bit: 1 bit
Up to 15 meters
Non-isolated: 50 m.; Isolated: 1 km.
1 Slave station only
Max. 255 stations (For more than 32, add
repeater(s) in the circuit is required)
CP2~CP5: VS-D232-EC
CP3, CP5: VS-D52A-EC(CH2)
CP1: Main Unit built-in
CP2~CP5: VS-D485-EC, VS-D485A-EC
CP2, CP4: VS-485-EC, VS-485A-EC, VS-D52A-EC(CH1)
CP3, CP5: VS-ENET-EC(CH2)
VS Series PLC (including VS1, VS2, VSM and VS3)
All the X, Y, M, S, T, C, D, R are included
Item
Specification
RS-485RS-232Communication Interface
Communication Protocol
Commection Method
Communication Paramete
Baud Rate
Distance
No. of Slave Stations
Linking Equipment
Available Model
Transferable Device
The VS PLC will respond to the communication requirement by any device (such as a computer, HMI,...) if that follows
the particular “VS Compurter Link Protocol” to give correct command. For the detail of the VS Protocol, please refer
to the section “7-4 VS Series PLC Communication Protocol” for details.
Usually, HMI or SCADA supplier base on the “VS Compurter Link Protocol” to compile driving program. Therefore, the
HMI or SCADA user just needs to select the correct communication type when planning the system, so that can
communicate with VS PLCs to construct a monitoring area network.
Some software or HMI may not be equipped with the driving program of the VS Series PLC. In this case, the
“MODBUD Slave” application type can be used to connect them. Please refer to the section “7-3-5 MODBUD Slave”
for details.